From 92135686929a336b141763f5e1985cc73c7eadcd Mon Sep 17 00:00:00 2001
From: Yongteng Lei <yongtengrey@outlook.com>
Date: Tue, 11 Nov 2025 17:36:48 +0800
Subject: [PATCH] Feat: add mechanism to check cancellation in Agent (#10766)

### What problem does this PR solve?

Add mechanism to check cancellation in Agent.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)
---
 agent/canvas.py                     | 36 +++++++++++++++++++++++++++--
 agent/component/agent_with_tools.py | 17 ++++++++++++++
 agent/component/base.py             | 14 +++++++++++
 agent/component/begin.py            |  6 +++++
 agent/component/categorize.py       | 11 +++++++++
 agent/component/fillup.py           |  7 ++++--
 agent/component/invoke.py           |  9 ++++++++
 agent/component/iteration.py        |  3 +++
 agent/component/iterationitem.py    | 10 +++++++-
 agent/component/llm.py              | 14 ++++++++++-
 agent/component/message.py          | 17 +++++++++++++-
 agent/component/string_transform.py | 10 ++++++++
 agent/component/switch.py           | 11 ++++++++-
 agent/tools/arxiv.py                | 16 ++++++++++++-
 agent/tools/base.py                 |  5 +++-
 agent/tools/code_exec.py            | 29 +++++++++++++++++++++++
 agent/tools/crawler.py              | 12 +++++++---
 agent/tools/deepl.py                |  7 ++++++
 agent/tools/duckduckgo.py           | 23 ++++++++++++++++++
 agent/tools/email.py                | 17 +++++++++++++-
 agent/tools/exesql.py               | 23 ++++++++++++++++++
 agent/tools/github.py               | 13 +++++++++++
 agent/tools/google.py               | 13 +++++++++++
 agent/tools/googlescholar.py        | 13 +++++++++++
 agent/tools/jin10.py                | 20 ++++++++++++++++
 agent/tools/pubmed.py               | 17 ++++++++++++++
 agent/tools/qweather.py             | 19 +++++++++++++++
 agent/tools/retrieval.py            | 15 +++++++++++-
 agent/tools/searxng.py              | 18 +++++++++++++++
 agent/tools/tavily.py               | 24 +++++++++++++++++++
 agent/tools/tushare.py              | 12 ++++++++++
 agent/tools/wencai.py               | 15 ++++++++++++
 agent/tools/wikipedia.py            | 12 ++++++++++
 agent/tools/yahoofinance.py         | 12 ++++++++++
 api/apps/canvas_app.py              |  9 +++++---
 rag/svr/task_executor.py            |  6 +++--
 36 files changed, 495 insertions(+), 20 deletions(-)

diff --git a/agent/canvas.py b/agent/canvas.py
index cdb9233c4..72dce5d33 100644
--- a/agent/canvas.py
+++ b/agent/canvas.py
@@ -26,7 +26,9 @@ from typing import Any, Union, Tuple
 from agent.component import component_class
 from agent.component.base import ComponentBase
 from api.db.services.file_service import FileService
+from api.db.services.task_service import has_canceled
 from common.misc_utils import get_uuid, hash_str2int
+from common.exceptions import TaskCanceledException
 from rag.prompts.generator import chunks_format
 from rag.utils.redis_conn import REDIS_CONN
 
@@ -126,6 +128,7 @@ class Graph:
             self.components[k]["obj"].reset()
         try:
             REDIS_CONN.delete(f"{self.task_id}-logs")
+            REDIS_CONN.delete(f"{self.task_id}-cancel")
         except Exception as e:
             logging.exception(e)
 
@@ -196,7 +199,7 @@ class Graph:
         if not rest:
             return root_val
         return self.get_variable_param_value(root_val,rest)
-    
+
     def get_variable_param_value(self, obj: Any, path: str) -> Any:
         cur = obj
         if not path:
@@ -215,6 +218,17 @@ class Graph:
                 cur = getattr(cur, key, None)
         return cur
 
+    def is_canceled(self) -> bool:
+        return has_canceled(self.task_id)
+
+    def cancel_task(self) -> bool:
+        try:
+            REDIS_CONN.set(f"{self.task_id}-cancel", "x")
+        except Exception as e:
+            logging.exception(e)
+            return False
+        return True
+
 
 class Canvas(Graph):
 
@@ -239,7 +253,7 @@ class Canvas(Graph):
             "sys.conversation_turns": 0,
             "sys.files": []
         }
-            
+
         self.retrieval = self.dsl["retrieval"]
         self.memory = self.dsl.get("memory", [])
 
@@ -311,10 +325,20 @@ class Canvas(Graph):
             self.path.append("begin")
             self.retrieval.append({"chunks": [], "doc_aggs": []})
 
+        if self.is_canceled():
+            msg = f"Task {self.task_id} has been canceled before starting."
+            logging.info(msg)
+            raise TaskCanceledException(msg)
+
         yield decorate("workflow_started", {"inputs": kwargs.get("inputs")})
         self.retrieval.append({"chunks": {}, "doc_aggs": {}})
 
         def _run_batch(f, t):
+            if self.is_canceled():
+                msg = f"Task {self.task_id} has been canceled during batch execution."
+                logging.info(msg)
+                raise TaskCanceledException(msg)
+
             with ThreadPoolExecutor(max_workers=5) as executor:
                 thr = []
                 i = f
@@ -473,6 +497,14 @@ class Canvas(Graph):
                            "created_at": st,
                        })
             self.history.append(("assistant", self.get_component_obj(self.path[-1]).output()))
+        elif "Task has been canceled" in self.error:
+            yield decorate("workflow_finished",
+                       {
+                           "inputs": kwargs.get("inputs"),
+                           "outputs": "Task has been canceled",
+                           "elapsed_time": time.perf_counter() - st,
+                           "created_at": st,
+                       })
 
     def is_reff(self, exp: str) -> bool:
         exp = exp.strip("{").strip("}")
diff --git a/agent/component/agent_with_tools.py b/agent/component/agent_with_tools.py
index 53c2ed9ad..98dfbc92f 100644
--- a/agent/component/agent_with_tools.py
+++ b/agent/component/agent_with_tools.py
@@ -139,6 +139,9 @@ class Agent(LLM, ToolBase):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 20*60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Agent processing"):
+            return
+
         if kwargs.get("user_prompt"):
             usr_pmt = ""
             if kwargs.get("reasoning"):
@@ -152,6 +155,8 @@ class Agent(LLM, ToolBase):
             self._param.prompts = [{"role": "user", "content": usr_pmt}]
 
         if not self.tools:
+            if self.check_if_canceled("Agent processing"):
+                return
             return LLM._invoke(self, **kwargs)
 
         prompt, msg, user_defined_prompt = self._prepare_prompt_variables()
@@ -171,6 +176,8 @@ class Agent(LLM, ToolBase):
         use_tools = []
         ans = ""
         for delta_ans, tk in self._react_with_tools_streamly(prompt, msg, use_tools, user_defined_prompt):
+            if self.check_if_canceled("Agent processing"):
+                return
             ans += delta_ans
 
         if ans.find("**ERROR**") >= 0:
@@ -191,12 +198,16 @@ class Agent(LLM, ToolBase):
         answer_without_toolcall = ""
         use_tools = []
         for delta_ans,_ in self._react_with_tools_streamly(prompt, msg, use_tools, user_defined_prompt):
+            if self.check_if_canceled("Agent streaming"):
+                return
+
             if delta_ans.find("**ERROR**") >= 0:
                 if self.get_exception_default_value():
                     self.set_output("content", self.get_exception_default_value())
                     yield self.get_exception_default_value()
                 else:
                     self.set_output("_ERROR", delta_ans)
+                    return
             answer_without_toolcall += delta_ans
             yield delta_ans
 
@@ -271,6 +282,8 @@ class Agent(LLM, ToolBase):
             st = timer()
             txt = ""
             for delta_ans in self._gen_citations(entire_txt):
+                if self.check_if_canceled("Agent streaming"):
+                    return
                 yield delta_ans, 0
                 txt += delta_ans
 
@@ -286,6 +299,8 @@ class Agent(LLM, ToolBase):
         task_desc = analyze_task(self.chat_mdl, prompt, user_request, tool_metas, user_defined_prompt)
         self.callback("analyze_task", {}, task_desc, elapsed_time=timer()-st)
         for _ in range(self._param.max_rounds + 1):
+            if self.check_if_canceled("Agent streaming"):
+                return
             response, tk = next_step(self.chat_mdl, hist, tool_metas, task_desc, user_defined_prompt)
             # self.callback("next_step", {}, str(response)[:256]+"...")
             token_count += tk
@@ -333,6 +348,8 @@ Instructions:
 6. Focus on delivering VALUE with the information already gathered
 Respond immediately with your final comprehensive answer.
         """
+        if self.check_if_canceled("Agent final instruction"):
+            return
         append_user_content(hist, final_instruction)
 
         for txt, tkcnt in complete():
diff --git a/agent/component/base.py b/agent/component/base.py
index cfec4ac1f..31ad46820 100644
--- a/agent/component/base.py
+++ b/agent/component/base.py
@@ -417,6 +417,20 @@ class ComponentBase(ABC):
         self._param = param
         self._param.check()
 
+    def is_canceled(self) -> bool:
+        return self._canvas.is_canceled()
+
+    def check_if_canceled(self, message: str = "") -> bool:
+        if self.is_canceled():
+            task_id = getattr(self._canvas, 'task_id', 'unknown')
+            log_message = f"Task {task_id} has been canceled"
+            if message:
+                log_message += f" during {message}"
+            logging.info(log_message)
+            self.set_output("_ERROR", "Task has been canceled")
+            return True
+        return False
+
     def invoke(self, **kwargs) -> dict[str, Any]:
         self.set_output("_created_time", time.perf_counter())
         try:
diff --git a/agent/component/begin.py b/agent/component/begin.py
index 159f0f5d7..b5985bb7a 100644
--- a/agent/component/begin.py
+++ b/agent/component/begin.py
@@ -37,7 +37,13 @@ class Begin(UserFillUp):
     component_name = "Begin"
 
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Begin processing"):
+            return
+
         for k, v in kwargs.get("inputs", {}).items():
+            if self.check_if_canceled("Begin processing"):
+                return
+
             if isinstance(v, dict) and v.get("type", "").lower().find("file") >=0:
                 if v.get("optional") and v.get("value", None) is None:
                     v = None
diff --git a/agent/component/categorize.py b/agent/component/categorize.py
index 3534225d9..1333889bb 100644
--- a/agent/component/categorize.py
+++ b/agent/component/categorize.py
@@ -98,6 +98,9 @@ class Categorize(LLM, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 10*60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Categorize processing"):
+            return
+
         msg = self._canvas.get_history(self._param.message_history_window_size)
         if not msg:
             msg = [{"role": "user", "content": ""}]
@@ -114,10 +117,18 @@ class Categorize(LLM, ABC):
 ---- Real Data ----
 {} →
 """.format(" | ".join(["{}: \"{}\"".format(c["role"].upper(), re.sub(r"\n", "", c["content"], flags=re.DOTALL)) for c in msg]))
+
+        if self.check_if_canceled("Categorize processing"):
+            return
+
         ans = chat_mdl.chat(self._param.sys_prompt, [{"role": "user", "content": user_prompt}], self._param.gen_conf())
         logging.info(f"input: {user_prompt}, answer: {str(ans)}")
         if ERROR_PREFIX in ans:
             raise Exception(ans)
+
+        if self.check_if_canceled("Categorize processing"):
+            return
+
         # Count the number of times each category appears in the answer.
         category_counts = {}
         for c in self._param.category_description.keys():
diff --git a/agent/component/fillup.py b/agent/component/fillup.py
index 7d27280c5..7428912d4 100644
--- a/agent/component/fillup.py
+++ b/agent/component/fillup.py
@@ -35,6 +35,9 @@ class UserFillUp(ComponentBase):
     component_name = "UserFillUp"
 
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("UserFillUp processing"):
+            return
+
         if self._param.enable_tips:
             content = self._param.tips
             for k, v in self.get_input_elements_from_text(self._param.tips).items():
@@ -58,9 +61,9 @@ class UserFillUp(ComponentBase):
 
             self.set_output("tips", content)
         for k, v in kwargs.get("inputs", {}).items():
+            if self.check_if_canceled("UserFillUp processing"):
+                return
             self.set_output(k, v)
 
     def thoughts(self) -> str:
         return "Waiting for your input..."
-
-
diff --git a/agent/component/invoke.py b/agent/component/invoke.py
index 00a39b905..61ebe2b39 100644
--- a/agent/component/invoke.py
+++ b/agent/component/invoke.py
@@ -56,6 +56,9 @@ class Invoke(ComponentBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 3)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Invoke processing"):
+            return
+
         args = {}
         for para in self._param.variables:
             if para.get("value"):
@@ -89,6 +92,9 @@ class Invoke(ComponentBase, ABC):
 
         last_e = ""
         for _ in range(self._param.max_retries + 1):
+            if self.check_if_canceled("Invoke processing"):
+                return
+
             try:
                 if method == "get":
                     response = requests.get(url=url, params=args, headers=headers, proxies=proxies, timeout=self._param.timeout)
@@ -121,6 +127,9 @@ class Invoke(ComponentBase, ABC):
 
                 return self.output("result")
             except Exception as e:
+                if self.check_if_canceled("Invoke processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"Http request error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/component/iteration.py b/agent/component/iteration.py
index a6065a281..a39147d8f 100644
--- a/agent/component/iteration.py
+++ b/agent/component/iteration.py
@@ -56,6 +56,9 @@ class Iteration(ComponentBase, ABC):
                 return cid
 
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Iteration processing"):
+            return
+
         arr = self._canvas.get_variable_value(self._param.items_ref)
         if not isinstance(arr, list):
             self.set_output("_ERROR", self._param.items_ref + " must be an array, but its type is "+str(type(arr)))
diff --git a/agent/component/iterationitem.py b/agent/component/iterationitem.py
index 6c4d0bae7..83713aedb 100644
--- a/agent/component/iterationitem.py
+++ b/agent/component/iterationitem.py
@@ -33,6 +33,9 @@ class IterationItem(ComponentBase, ABC):
         self._idx = 0
 
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("IterationItem processing"):
+            return
+
         parent = self.get_parent()
         arr = self._canvas.get_variable_value(parent._param.items_ref)
         if not isinstance(arr, list):
@@ -40,12 +43,17 @@ class IterationItem(ComponentBase, ABC):
             raise Exception(parent._param.items_ref + " must be an array, but its type is "+str(type(arr)))
 
         if self._idx > 0:
+            if self.check_if_canceled("IterationItem processing"):
+                return
             self.output_collation()
 
         if self._idx >= len(arr):
             self._idx = -1
             return
 
+        if self.check_if_canceled("IterationItem processing"):
+            return
+
         self.set_output("item", arr[self._idx])
         self.set_output("index", self._idx)
 
@@ -80,4 +88,4 @@ class IterationItem(ComponentBase, ABC):
         return self._idx == -1
 
     def thoughts(self) -> str:
-        return "Next turn..."
\ No newline at end of file
+        return "Next turn..."
diff --git a/agent/component/llm.py b/agent/component/llm.py
index c8383835b..6ce0f65a5 100644
--- a/agent/component/llm.py
+++ b/agent/component/llm.py
@@ -207,6 +207,9 @@ class LLM(ComponentBase):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 10*60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("LLM processing"):
+            return
+
         def clean_formated_answer(ans: str) -> str:
             ans = re.sub(r"^.*</think>", "", ans, flags=re.DOTALL)
             ans = re.sub(r"^.*```json", "", ans, flags=re.DOTALL)
@@ -223,6 +226,9 @@ class LLM(ComponentBase):
             schema=json.dumps(output_structure, ensure_ascii=False, indent=2)
             prompt += structured_output_prompt(schema)
             for _ in range(self._param.max_retries+1):
+                if self.check_if_canceled("LLM processing"):
+                    return
+
                 _, msg = message_fit_in([{"role": "system", "content": prompt}, *msg], int(self.chat_mdl.max_length * 0.97))
                 error = ""
                 ans = self._generate(msg)
@@ -248,6 +254,9 @@ class LLM(ComponentBase):
             return
 
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("LLM processing"):
+                return
+
             _, msg = message_fit_in([{"role": "system", "content": prompt}, *msg], int(self.chat_mdl.max_length * 0.97))
             error = ""
             ans = self._generate(msg)
@@ -269,6 +278,9 @@ class LLM(ComponentBase):
         _, msg = message_fit_in([{"role": "system", "content": prompt}, *msg], int(self.chat_mdl.max_length * 0.97))
         answer = ""
         for ans in self._generate_streamly(msg):
+            if self.check_if_canceled("LLM streaming"):
+                return
+
             if ans.find("**ERROR**") >= 0:
                 if self.get_exception_default_value():
                     self.set_output("content", self.get_exception_default_value())
@@ -287,4 +299,4 @@ class LLM(ComponentBase):
 
     def thoughts(self) -> str:
         _, msg,_ = self._prepare_prompt_variables()
-        return "⌛Give me a moment—starting from: \n\n" + re.sub(r"(User's query:|[\\]+)", '', msg[-1]['content'], flags=re.DOTALL) + "\n\nI’ll figure out our best next move."
\ No newline at end of file
+        return "⌛Give me a moment—starting from: \n\n" + re.sub(r"(User's query:|[\\]+)", '', msg[-1]['content'], flags=re.DOTALL) + "\n\nI’ll figure out our best next move."
diff --git a/agent/component/message.py b/agent/component/message.py
index 1a506325e..641198083 100644
--- a/agent/component/message.py
+++ b/agent/component/message.py
@@ -89,6 +89,9 @@ class Message(ComponentBase):
         all_content = ""
         cache = {}
         for r in re.finditer(self.variable_ref_patt, rand_cnt, flags=re.DOTALL):
+            if self.check_if_canceled("Message streaming"):
+                return
+
             all_content += rand_cnt[s: r.start()]
             yield rand_cnt[s: r.start()]
             s = r.end()
@@ -104,6 +107,9 @@ class Message(ComponentBase):
             if isinstance(v, partial):
                 cnt = ""
                 for t in v():
+                    if self.check_if_canceled("Message streaming"):
+                        return
+
                     all_content += t
                     cnt += t
                     yield t
@@ -111,7 +117,7 @@ class Message(ComponentBase):
                 continue
             elif not isinstance(v, str):
                 try:
-                    v = json.dumps(v, ensure_ascii=False, indent=2)
+                    v = json.dumps(v, ensure_ascii=False)
                 except Exception:
                     v = str(v)
             yield v
@@ -120,6 +126,9 @@ class Message(ComponentBase):
             cache[exp] = v
 
         if s < len(rand_cnt):
+            if self.check_if_canceled("Message streaming"):
+                return
+
             all_content += rand_cnt[s: ]
             yield rand_cnt[s: ]
 
@@ -133,6 +142,9 @@ class Message(ComponentBase):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 10*60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Message processing"):
+            return
+
         rand_cnt = random.choice(self._param.content)
         if self._param.stream and not self._is_jinjia2(rand_cnt):
             self.set_output("content", partial(self._stream, rand_cnt))
@@ -145,6 +157,9 @@ class Message(ComponentBase):
         except Exception:
             pass
 
+        if self.check_if_canceled("Message processing"):
+            return
+
         for n, v in kwargs.items():
             content = re.sub(n, v, content)
 
diff --git a/agent/component/string_transform.py b/agent/component/string_transform.py
index 08e44d2e0..444161f72 100644
--- a/agent/component/string_transform.py
+++ b/agent/component/string_transform.py
@@ -63,17 +63,24 @@ class StringTransform(Message, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 10*60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("StringTransform processing"):
+            return
+
         if self._param.method == "split":
             self._split(kwargs.get("line"))
         else:
             self._merge(kwargs)
 
     def _split(self, line:str|None = None):
+        if self.check_if_canceled("StringTransform split processing"):
+            return
+
         var = self._canvas.get_variable_value(self._param.split_ref) if not line else line
         if not var:
             var = ""
         assert isinstance(var, str), "The input variable is not a string: {}".format(type(var))
         self.set_input_value(self._param.split_ref, var)
+
         res = []
         for i,s in enumerate(re.split(r"(%s)"%("|".join([re.escape(d) for d in self._param.delimiters])), var, flags=re.DOTALL)):
             if i % 2 == 1:
@@ -82,6 +89,9 @@ class StringTransform(Message, ABC):
         self.set_output("result", res)
 
     def _merge(self, kwargs:dict[str, str] = {}):
+        if self.check_if_canceled("StringTransform merge processing"):
+            return
+
         script = self._param.script
         script, kwargs = self.get_kwargs(script, kwargs, self._param.delimiters[0])
 
diff --git a/agent/component/switch.py b/agent/component/switch.py
index 41c25c32f..85e6cd03b 100644
--- a/agent/component/switch.py
+++ b/agent/component/switch.py
@@ -63,9 +63,18 @@ class Switch(ComponentBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 3)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Switch processing"):
+            return
+
         for cond in self._param.conditions:
+            if self.check_if_canceled("Switch processing"):
+                return
+
             res = []
             for item in cond["items"]:
+                if self.check_if_canceled("Switch processing"):
+                    return
+
                 if not item["cpn_id"]:
                     continue
                 cpn_v = self._canvas.get_variable_value(item["cpn_id"])
@@ -128,4 +137,4 @@ class Switch(ComponentBase, ABC):
         raise ValueError('Not supported operator' + operator)
 
     def thoughts(self) -> str:
-        return "I’m weighing a few options and will pick the next step shortly."
\ No newline at end of file
+        return "I’m weighing a few options and will pick the next step shortly."
diff --git a/agent/tools/arxiv.py b/agent/tools/arxiv.py
index 74a810c74..10d502c56 100644
--- a/agent/tools/arxiv.py
+++ b/agent/tools/arxiv.py
@@ -63,12 +63,18 @@ class ArXiv(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("ArXiv processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("formalized_content", "")
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("ArXiv processing"):
+                return
+
             try:
                 sort_choices = {"relevance": arxiv.SortCriterion.Relevance,
                                 "lastUpdatedDate": arxiv.SortCriterion.LastUpdatedDate,
@@ -79,12 +85,20 @@ class ArXiv(ToolBase, ABC):
                     max_results=self._param.top_n,
                     sort_by=sort_choices[self._param.sort_by]
                 )
-                self._retrieve_chunks(list(arxiv_client.results(search)),
+                results = list(arxiv_client.results(search))
+
+                if self.check_if_canceled("ArXiv processing"):
+                    return
+
+                self._retrieve_chunks(results,
                                       get_title=lambda r: r.title,
                                       get_url=lambda r: r.pdf_url,
                                       get_content=lambda r: r.summary)
                 return self.output("formalized_content")
             except Exception as e:
+                if self.check_if_canceled("ArXiv processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"ArXiv error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/base.py b/agent/tools/base.py
index 93bde20aa..a3d569694 100644
--- a/agent/tools/base.py
+++ b/agent/tools/base.py
@@ -125,6 +125,9 @@ class ToolBase(ComponentBase):
         return self._param.get_meta()
 
     def invoke(self, **kwargs):
+        if self.check_if_canceled("Tool processing"):
+            return
+
         self.set_output("_created_time", time.perf_counter())
         try:
             res = self._invoke(**kwargs)
@@ -170,4 +173,4 @@ class ToolBase(ComponentBase):
         self.set_output("formalized_content", "\n".join(kb_prompt({"chunks": chunks, "doc_aggs": aggs}, 200000, True)))
 
     def thoughts(self) -> str:
-        return self._canvas.get_component_name(self._id) + " is running..."
\ No newline at end of file
+        return self._canvas.get_component_name(self._id) + " is running..."
diff --git a/agent/tools/code_exec.py b/agent/tools/code_exec.py
index 7145d8b89..adba4168e 100644
--- a/agent/tools/code_exec.py
+++ b/agent/tools/code_exec.py
@@ -131,10 +131,14 @@ class CodeExec(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 10*60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("CodeExec processing"):
+            return
+
         lang = kwargs.get("lang", self._param.lang)
         script = kwargs.get("script", self._param.script)
         arguments = {}
         for k, v in self._param.arguments.items():
+
             if kwargs.get(k):
                 arguments[k] = kwargs[k]
                 continue
@@ -149,15 +153,28 @@ class CodeExec(ToolBase, ABC):
     def _execute_code(self, language: str, code: str, arguments: dict):
         import requests
 
+        if self.check_if_canceled("CodeExec execution"):
+            return
+
         try:
             code_b64 = self._encode_code(code)
             code_req = CodeExecutionRequest(code_b64=code_b64, language=language, arguments=arguments).model_dump()
         except Exception as e:
+            if self.check_if_canceled("CodeExec execution"):
+                return
+
             self.set_output("_ERROR", "construct code request error: " + str(e))
 
         try:
+            if self.check_if_canceled("CodeExec execution"):
+                return "Task has been canceled"
+
             resp = requests.post(url=f"http://{settings.SANDBOX_HOST}:9385/run", json=code_req, timeout=int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 10*60)))
             logging.info(f"http://{settings.SANDBOX_HOST}:9385/run,  code_req: {code_req}, resp.status_code {resp.status_code}:")
+
+            if self.check_if_canceled("CodeExec execution"):
+                return "Task has been canceled"
+
             if resp.status_code != 200:
                 resp.raise_for_status()
             body = resp.json()
@@ -173,16 +190,25 @@ class CodeExec(ToolBase, ABC):
                 logging.info(f"http://{settings.SANDBOX_HOST}:9385/run -> {rt}")
                 if isinstance(rt, tuple):
                     for i, (k, o) in enumerate(self._param.outputs.items()):
+                        if self.check_if_canceled("CodeExec execution"):
+                            return
+
                         if k.find("_") == 0:
                             continue
                         o["value"] = rt[i]
                 elif isinstance(rt, dict):
                     for i, (k, o) in enumerate(self._param.outputs.items()):
+                        if self.check_if_canceled("CodeExec execution"):
+                            return
+
                         if k not in rt or k.find("_") == 0:
                             continue
                         o["value"] = rt[k]
                 else:
                     for i, (k, o) in enumerate(self._param.outputs.items()):
+                        if self.check_if_canceled("CodeExec execution"):
+                            return
+
                         if k.find("_") == 0:
                             continue
                         o["value"] = rt
@@ -190,6 +216,9 @@ class CodeExec(ToolBase, ABC):
                 self.set_output("_ERROR", "There is no response from sandbox")
 
         except Exception as e:
+            if self.check_if_canceled("CodeExec execution"):
+                return
+
             self.set_output("_ERROR", "Exception executing code: " + str(e))
 
         return self.output()
diff --git a/agent/tools/crawler.py b/agent/tools/crawler.py
index 869fae4a3..e4d049e1b 100644
--- a/agent/tools/crawler.py
+++ b/agent/tools/crawler.py
@@ -29,7 +29,7 @@ class CrawlerParam(ToolParamBase):
         super().__init__()
         self.proxy = None
         self.extract_type = "markdown"
-    
+
     def check(self):
         self.check_valid_value(self.extract_type, "Type of content from the crawler", ['html', 'markdown', 'content'])
 
@@ -47,18 +47,24 @@ class Crawler(ToolBase, ABC):
             result = asyncio.run(self.get_web(ans))
 
             return Crawler.be_output(result)
-            
+
         except Exception as e:
             return Crawler.be_output(f"An unexpected error occurred: {str(e)}")
 
     async def get_web(self, url):
+        if self.check_if_canceled("Crawler async operation"):
+            return
+
         proxy = self._param.proxy if self._param.proxy else None
         async with AsyncWebCrawler(verbose=True, proxy=proxy) as crawler:
             result = await crawler.arun(
                 url=url,
                 bypass_cache=True
             )
-            
+
+            if self.check_if_canceled("Crawler async operation"):
+                return
+
             if self._param.extract_type == 'html':
                 return result.cleaned_html
             elif self._param.extract_type == 'markdown':
diff --git a/agent/tools/deepl.py b/agent/tools/deepl.py
index 41d12341d..dc331aafe 100644
--- a/agent/tools/deepl.py
+++ b/agent/tools/deepl.py
@@ -46,11 +46,16 @@ class DeepL(ComponentBase, ABC):
     component_name = "DeepL"
 
     def _run(self, history, **kwargs):
+        if self.check_if_canceled("DeepL processing"):
+            return
         ans = self.get_input()
         ans = " - ".join(ans["content"]) if "content" in ans else ""
         if not ans:
             return DeepL.be_output("")
 
+        if self.check_if_canceled("DeepL processing"):
+            return
+
         try:
             translator = deepl.Translator(self._param.auth_key)
             result = translator.translate_text(ans, source_lang=self._param.source_lang,
@@ -58,4 +63,6 @@ class DeepL(ComponentBase, ABC):
 
             return DeepL.be_output(result.text)
         except Exception as e:
+            if self.check_if_canceled("DeepL processing"):
+                return
             DeepL.be_output("**Error**:" + str(e))
diff --git a/agent/tools/duckduckgo.py b/agent/tools/duckduckgo.py
index fcf5ee077..fd2ec1801 100644
--- a/agent/tools/duckduckgo.py
+++ b/agent/tools/duckduckgo.py
@@ -75,17 +75,30 @@ class DuckDuckGo(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("DuckDuckGo processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("formalized_content", "")
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("DuckDuckGo processing"):
+                return
+
             try:
                 if kwargs.get("topic", "general") == "general":
                     with DDGS() as ddgs:
+                        if self.check_if_canceled("DuckDuckGo processing"):
+                            return
+
                         # {'title': '', 'href': '', 'body': ''}
                         duck_res = ddgs.text(kwargs["query"], max_results=self._param.top_n)
+
+                        if self.check_if_canceled("DuckDuckGo processing"):
+                            return
+
                         self._retrieve_chunks(duck_res,
                                               get_title=lambda r: r["title"],
                                               get_url=lambda r: r.get("href", r.get("url")),
@@ -94,8 +107,15 @@ class DuckDuckGo(ToolBase, ABC):
                         return self.output("formalized_content")
                 else:
                     with DDGS() as ddgs:
+                        if self.check_if_canceled("DuckDuckGo processing"):
+                            return
+
                         # {'date': '', 'title': '', 'body': '', 'url': '', 'image': '', 'source': ''}
                         duck_res = ddgs.news(kwargs["query"], max_results=self._param.top_n)
+
+                        if self.check_if_canceled("DuckDuckGo processing"):
+                            return
+
                         self._retrieve_chunks(duck_res,
                                               get_title=lambda r: r["title"],
                                               get_url=lambda r: r.get("href", r.get("url")),
@@ -103,6 +123,9 @@ class DuckDuckGo(ToolBase, ABC):
                         self.set_output("json", duck_res)
                         return self.output("formalized_content")
             except Exception as e:
+                if self.check_if_canceled("DuckDuckGo processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"DuckDuckGo error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/email.py b/agent/tools/email.py
index 42d3e2878..e19fd69c6 100644
--- a/agent/tools/email.py
+++ b/agent/tools/email.py
@@ -101,19 +101,27 @@ class Email(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Email processing"):
+            return
+
         if not kwargs.get("to_email"):
             self.set_output("success", False)
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("Email processing"):
+                return
+
             try:
                 # Parse JSON string passed from upstream
                 email_data = kwargs
 
                 # Validate required fields
                 if "to_email" not in email_data:
-                    return Email.be_output("Missing required field: to_email")
+                    self.set_output("_ERROR", "Missing required field: to_email")
+                    self.set_output("success", False)
+                    return False
 
                 # Create email object
                 msg = MIMEMultipart('alternative')
@@ -133,6 +141,9 @@ class Email(ToolBase, ABC):
                 # Connect to SMTP server and send
                 logging.info(f"Connecting to SMTP server {self._param.smtp_server}:{self._param.smtp_port}")
 
+                if self.check_if_canceled("Email processing"):
+                    return
+
                 context = smtplib.ssl.create_default_context()
                 with smtplib.SMTP(self._param.smtp_server, self._param.smtp_port) as server:
                     server.ehlo()
@@ -149,6 +160,10 @@ class Email(ToolBase, ABC):
 
                     # Send email
                     logging.info(f"Sending email to recipients: {recipients}")
+
+                    if self.check_if_canceled("Email processing"):
+                        return
+
                     try:
                         server.send_message(msg, self._param.email, recipients)
                         success = True
diff --git a/agent/tools/exesql.py b/agent/tools/exesql.py
index b5917e730..012b00d84 100644
--- a/agent/tools/exesql.py
+++ b/agent/tools/exesql.py
@@ -81,6 +81,8 @@ class ExeSQL(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("ExeSQL processing"):
+            return
 
         def convert_decimals(obj):
             from decimal import Decimal
@@ -96,6 +98,9 @@ class ExeSQL(ToolBase, ABC):
         if not sql:
             raise Exception("SQL for `ExeSQL` MUST not be empty.")
 
+        if self.check_if_canceled("ExeSQL processing"):
+            return
+
         vars = self.get_input_elements_from_text(sql)
         args = {}
         for k, o in vars.items():
@@ -108,6 +113,9 @@ class ExeSQL(ToolBase, ABC):
             self.set_input_value(k, args[k])
         sql = self.string_format(sql, args)
 
+        if self.check_if_canceled("ExeSQL processing"):
+            return
+
         sqls = sql.split(";")
         if self._param.db_type in ["mysql", "mariadb"]:
             db = pymysql.connect(db=self._param.database, user=self._param.username, host=self._param.host,
@@ -181,6 +189,10 @@ class ExeSQL(ToolBase, ABC):
             sql_res = []
             formalized_content = []
             for single_sql in sqls:
+                if self.check_if_canceled("ExeSQL processing"):
+                    ibm_db.close(conn)
+                    return
+
                 single_sql = single_sql.replace("```", "").strip()
                 if not single_sql:
                     continue
@@ -190,6 +202,9 @@ class ExeSQL(ToolBase, ABC):
                 rows = []
                 row = ibm_db.fetch_assoc(stmt)
                 while row and len(rows) < self._param.max_records:
+                    if self.check_if_canceled("ExeSQL processing"):
+                        ibm_db.close(conn)
+                        return
                     rows.append(row)
                     row = ibm_db.fetch_assoc(stmt)
 
@@ -220,6 +235,11 @@ class ExeSQL(ToolBase, ABC):
         sql_res = []
         formalized_content = []
         for single_sql in sqls:
+            if self.check_if_canceled("ExeSQL processing"):
+                cursor.close()
+                db.close()
+                return
+
             single_sql = single_sql.replace('```','')
             if not single_sql:
                 continue
@@ -244,6 +264,9 @@ class ExeSQL(ToolBase, ABC):
             sql_res.append(convert_decimals(single_res.to_dict(orient='records')))
             formalized_content.append(single_res.to_markdown(index=False, floatfmt=".6f"))
 
+        cursor.close()
+        db.close()
+
         self.set_output("json", sql_res)
         self.set_output("formalized_content", "\n\n".join(formalized_content))
         return self.output("formalized_content")
diff --git a/agent/tools/github.py b/agent/tools/github.py
index 7b53f0b0b..f48ab0a2d 100644
--- a/agent/tools/github.py
+++ b/agent/tools/github.py
@@ -59,17 +59,27 @@ class GitHub(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("GitHub processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("formalized_content", "")
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("GitHub processing"):
+                return
+
             try:
                 url = 'https://api.github.com/search/repositories?q=' + kwargs["query"] + '&sort=stars&order=desc&per_page=' + str(
                     self._param.top_n)
                 headers = {"Content-Type": "application/vnd.github+json", "X-GitHub-Api-Version": '2022-11-28'}
                 response = requests.get(url=url, headers=headers).json()
+
+                if self.check_if_canceled("GitHub processing"):
+                    return
+
                 self._retrieve_chunks(response['items'],
                                       get_title=lambda r: r["name"],
                                       get_url=lambda r: r["html_url"],
@@ -77,6 +87,9 @@ class GitHub(ToolBase, ABC):
                 self.set_output("json", response['items'])
                 return self.output("formalized_content")
             except Exception as e:
+                if self.check_if_canceled("GitHub processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"GitHub error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/google.py b/agent/tools/google.py
index 3184aaaeb..312b5a1fe 100644
--- a/agent/tools/google.py
+++ b/agent/tools/google.py
@@ -118,6 +118,9 @@ class Google(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Google processing"):
+            return
+
         if not kwargs.get("q"):
             self.set_output("formalized_content", "")
             return ""
@@ -132,8 +135,15 @@ class Google(ToolBase, ABC):
         }
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("Google processing"):
+                return
+
             try:
                 search = GoogleSearch(params).get_dict()
+
+                if self.check_if_canceled("Google processing"):
+                    return
+
                 self._retrieve_chunks(search["organic_results"],
                                       get_title=lambda r: r["title"],
                                       get_url=lambda r: r["link"],
@@ -142,6 +152,9 @@ class Google(ToolBase, ABC):
                 self.set_output("json", search["organic_results"])
                 return self.output("formalized_content")
             except Exception as e:
+                if self.check_if_canceled("Google processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"Google error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/googlescholar.py b/agent/tools/googlescholar.py
index da7f6ef69..b5c4eb395 100644
--- a/agent/tools/googlescholar.py
+++ b/agent/tools/googlescholar.py
@@ -65,15 +65,25 @@ class GoogleScholar(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("GoogleScholar processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("formalized_content", "")
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("GoogleScholar processing"):
+                return
+
             try:
                 scholar_client = scholarly.search_pubs(kwargs["query"], patents=self._param.patents, year_low=self._param.year_low,
                                                        year_high=self._param.year_high, sort_by=self._param.sort_by)
+
+                if self.check_if_canceled("GoogleScholar processing"):
+                    return
+
                 self._retrieve_chunks(scholar_client,
                                       get_title=lambda r: r['bib']['title'],
                                       get_url=lambda r: r["pub_url"],
@@ -82,6 +92,9 @@ class GoogleScholar(ToolBase, ABC):
                 self.set_output("json", list(scholar_client))
                 return self.output("formalized_content")
             except Exception as e:
+                if self.check_if_canceled("GoogleScholar processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"GoogleScholar error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/jin10.py b/agent/tools/jin10.py
index 583a18286..b477dba81 100644
--- a/agent/tools/jin10.py
+++ b/agent/tools/jin10.py
@@ -50,6 +50,9 @@ class Jin10(ComponentBase, ABC):
     component_name = "Jin10"
 
     def _run(self, history, **kwargs):
+        if self.check_if_canceled("Jin10 processing"):
+            return
+
         ans = self.get_input()
         ans = " - ".join(ans["content"]) if "content" in ans else ""
         if not ans:
@@ -58,6 +61,9 @@ class Jin10(ComponentBase, ABC):
         jin10_res = []
         headers = {'secret-key': self._param.secret_key}
         try:
+            if self.check_if_canceled("Jin10 processing"):
+                return
+
             if self._param.type == "flash":
                 params = {
                     'category': self._param.flash_type,
@@ -69,6 +75,8 @@ class Jin10(ComponentBase, ABC):
                     headers=headers, data=json.dumps(params))
                 response = response.json()
                 for i in response['data']:
+                    if self.check_if_canceled("Jin10 processing"):
+                        return
                     jin10_res.append({"content": i['data']['content']})
             if self._param.type == "calendar":
                 params = {
@@ -79,6 +87,8 @@ class Jin10(ComponentBase, ABC):
                     headers=headers, data=json.dumps(params))
 
                 response = response.json()
+                if self.check_if_canceled("Jin10 processing"):
+                    return
                 jin10_res.append({"content": pd.DataFrame(response['data']).to_markdown()})
             if self._param.type == "symbols":
                 params = {
@@ -90,8 +100,12 @@ class Jin10(ComponentBase, ABC):
                     url='https://open-data-api.jin10.com/data-api/' + self._param.symbols_datatype + '?type=' + self._param.symbols_type,
                     headers=headers, data=json.dumps(params))
                 response = response.json()
+                if self.check_if_canceled("Jin10 processing"):
+                    return
                 if self._param.symbols_datatype == "symbols":
                     for i in response['data']:
+                        if self.check_if_canceled("Jin10 processing"):
+                            return
                         i['Commodity Code'] = i['c']
                         i['Stock Exchange'] = i['e']
                         i['Commodity Name'] = i['n']
@@ -99,6 +113,8 @@ class Jin10(ComponentBase, ABC):
                         del i['c'], i['e'], i['n'], i['t']
                 if self._param.symbols_datatype == "quotes":
                     for i in response['data']:
+                        if self.check_if_canceled("Jin10 processing"):
+                            return
                         i['Selling Price'] = i['a']
                         i['Buying Price'] = i['b']
                         i['Commodity Code'] = i['c']
@@ -120,8 +136,12 @@ class Jin10(ComponentBase, ABC):
                     url='https://open-data-api.jin10.com/data-api/news',
                     headers=headers, data=json.dumps(params))
                 response = response.json()
+                if self.check_if_canceled("Jin10 processing"):
+                    return
                 jin10_res.append({"content": pd.DataFrame(response['data']).to_markdown()})
         except Exception as e:
+            if self.check_if_canceled("Jin10 processing"):
+                return
             return Jin10.be_output("**ERROR**: " + str(e))
 
         if not jin10_res:
diff --git a/agent/tools/pubmed.py b/agent/tools/pubmed.py
index afa171768..05c222810 100644
--- a/agent/tools/pubmed.py
+++ b/agent/tools/pubmed.py
@@ -71,23 +71,40 @@ class PubMed(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("PubMed processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("formalized_content", "")
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("PubMed processing"):
+                return
+
             try:
                 Entrez.email = self._param.email
                 pubmedids = Entrez.read(Entrez.esearch(db='pubmed', retmax=self._param.top_n, term=kwargs["query"]))['IdList']
+
+                if self.check_if_canceled("PubMed processing"):
+                    return
+
                 pubmedcnt = ET.fromstring(re.sub(r'<(/?)b>|<(/?)i>', '', Entrez.efetch(db='pubmed', id=",".join(pubmedids),
                                                                                        retmode="xml").read().decode("utf-8")))
+
+                if self.check_if_canceled("PubMed processing"):
+                    return
+
                 self._retrieve_chunks(pubmedcnt.findall("PubmedArticle"),
                                       get_title=lambda child: child.find("MedlineCitation").find("Article").find("ArticleTitle").text,
                                       get_url=lambda child: "https://pubmed.ncbi.nlm.nih.gov/" + child.find("MedlineCitation").find("PMID").text,
                                       get_content=lambda child: self._format_pubmed_content(child),)
                 return self.output("formalized_content")
             except Exception as e:
+                if self.check_if_canceled("PubMed processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"PubMed error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/qweather.py b/agent/tools/qweather.py
index 2c38a8b7e..a597c2c5b 100644
--- a/agent/tools/qweather.py
+++ b/agent/tools/qweather.py
@@ -58,12 +58,18 @@ class QWeather(ComponentBase, ABC):
     component_name = "QWeather"
 
     def _run(self, history, **kwargs):
+        if self.check_if_canceled("Qweather processing"):
+            return
+
         ans = self.get_input()
         ans = "".join(ans["content"]) if "content" in ans else ""
         if not ans:
             return QWeather.be_output("")
 
         try:
+            if self.check_if_canceled("Qweather processing"):
+                return
+
             response = requests.get(
                 url="https://geoapi.qweather.com/v2/city/lookup?location=" + ans + "&key=" + self._param.web_apikey).json()
             if response["code"] == "200":
@@ -71,16 +77,23 @@ class QWeather(ComponentBase, ABC):
             else:
                 return QWeather.be_output("**Error**" + self._param.error_code[response["code"]])
 
+            if self.check_if_canceled("Qweather processing"):
+                return
+
             base_url = "https://api.qweather.com/v7/" if self._param.user_type == 'paid' else "https://devapi.qweather.com/v7/"
 
             if self._param.type == "weather":
                 url = base_url + "weather/" + self._param.time_period + "?location=" + location_id + "&key=" + self._param.web_apikey + "&lang=" + self._param.lang
                 response = requests.get(url=url).json()
+                if self.check_if_canceled("Qweather processing"):
+                    return
                 if response["code"] == "200":
                     if self._param.time_period == "now":
                         return QWeather.be_output(str(response["now"]))
                     else:
                         qweather_res = [{"content": str(i) + "\n"} for i in response["daily"]]
+                        if self.check_if_canceled("Qweather processing"):
+                            return
                         if not qweather_res:
                             return QWeather.be_output("")
 
@@ -92,6 +105,8 @@ class QWeather(ComponentBase, ABC):
             elif self._param.type == "indices":
                 url = base_url + "indices/1d?type=0&location=" + location_id + "&key=" + self._param.web_apikey + "&lang=" + self._param.lang
                 response = requests.get(url=url).json()
+                if self.check_if_canceled("Qweather processing"):
+                    return
                 if response["code"] == "200":
                     indices_res = response["daily"][0]["date"] + "\n" + "\n".join(
                         [i["name"] + ": " + i["category"] + ", " + i["text"] for i in response["daily"]])
@@ -103,9 +118,13 @@ class QWeather(ComponentBase, ABC):
             elif self._param.type == "airquality":
                 url = base_url + "air/now?location=" + location_id + "&key=" + self._param.web_apikey + "&lang=" + self._param.lang
                 response = requests.get(url=url).json()
+                if self.check_if_canceled("Qweather processing"):
+                    return
                 if response["code"] == "200":
                     return QWeather.be_output(str(response["now"]))
                 else:
                     return QWeather.be_output("**Error**" + self._param.error_code[response["code"]])
         except Exception as e:
+            if self.check_if_canceled("Qweather processing"):
+                return
             return QWeather.be_output("**Error**" + str(e))
diff --git a/agent/tools/retrieval.py b/agent/tools/retrieval.py
index 77b6145ed..ab388a08e 100644
--- a/agent/tools/retrieval.py
+++ b/agent/tools/retrieval.py
@@ -82,8 +82,12 @@ class Retrieval(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Retrieval processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("formalized_content", self._param.empty_response)
+            return
 
         kb_ids: list[str] = []
         for id in self._param.kb_ids:
@@ -122,7 +126,7 @@ class Retrieval(ToolBase, ABC):
         vars = self.get_input_elements_from_text(kwargs["query"])
         vars = {k:o["value"] for k,o in vars.items()}
         query = self.string_format(kwargs["query"], vars)
-        
+
         doc_ids=[]
         if self._param.meta_data_filter!={}:
             metas = DocumentService.get_meta_by_kbs(kb_ids)
@@ -184,9 +188,14 @@ class Retrieval(ToolBase, ABC):
                 rerank_mdl=rerank_mdl,
                 rank_feature=label_question(query, kbs),
             )
+            if self.check_if_canceled("Retrieval processing"):
+                return
+
             if self._param.toc_enhance:
                 chat_mdl = LLMBundle(self._canvas._tenant_id, LLMType.CHAT)
                 cks = settings.retriever.retrieval_by_toc(query, kbinfos["chunks"], [kb.tenant_id for kb in kbs], chat_mdl, self._param.top_n)
+                if self.check_if_canceled("Retrieval processing"):
+                    return
                 if cks:
                     kbinfos["chunks"] = cks
             if self._param.use_kg:
@@ -195,6 +204,8 @@ class Retrieval(ToolBase, ABC):
                                                        kb_ids,
                                                        embd_mdl,
                                                        LLMBundle(self._canvas.get_tenant_id(), LLMType.CHAT))
+                if self.check_if_canceled("Retrieval processing"):
+                    return
                 if ck["content_with_weight"]:
                     kbinfos["chunks"].insert(0, ck)
         else:
@@ -202,6 +213,8 @@ class Retrieval(ToolBase, ABC):
 
         if self._param.use_kg and kbs:
             ck = settings.kg_retriever.retrieval(query, [kb.tenant_id for kb in kbs], filtered_kb_ids, embd_mdl, LLMBundle(kbs[0].tenant_id, LLMType.CHAT))
+            if self.check_if_canceled("Retrieval processing"):
+                return
             if ck["content_with_weight"]:
                 ck["content"] = ck["content_with_weight"]
                 del ck["content_with_weight"]
diff --git a/agent/tools/searxng.py b/agent/tools/searxng.py
index 44ad18bae..fdc7bea52 100644
--- a/agent/tools/searxng.py
+++ b/agent/tools/searxng.py
@@ -79,6 +79,9 @@ class SearXNG(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("SearXNG processing"):
+            return
+
         # Gracefully handle try-run without inputs
         query = kwargs.get("query")
         if not query or not isinstance(query, str) or not query.strip():
@@ -93,6 +96,9 @@ class SearXNG(ToolBase, ABC):
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("SearXNG processing"):
+                return
+
             try:
                 search_params = {
                     'q': query,
@@ -110,6 +116,9 @@ class SearXNG(ToolBase, ABC):
                 )
                 response.raise_for_status()
 
+                if self.check_if_canceled("SearXNG processing"):
+                    return
+
                 data = response.json()
 
                 if not data or not isinstance(data, dict):
@@ -121,6 +130,9 @@ class SearXNG(ToolBase, ABC):
 
                 results = results[:self._param.top_n]
 
+                if self.check_if_canceled("SearXNG processing"):
+                    return
+
                 self._retrieve_chunks(results,
                                       get_title=lambda r: r.get("title", ""),
                                       get_url=lambda r: r.get("url", ""),
@@ -130,10 +142,16 @@ class SearXNG(ToolBase, ABC):
                 return self.output("formalized_content")
 
             except requests.RequestException as e:
+                if self.check_if_canceled("SearXNG processing"):
+                    return
+
                 last_e = f"Network error: {e}"
                 logging.exception(f"SearXNG network error: {e}")
                 time.sleep(self._param.delay_after_error)
             except Exception as e:
+                if self.check_if_canceled("SearXNG processing"):
+                    return
+
                 last_e = str(e)
                 logging.exception(f"SearXNG error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/tavily.py b/agent/tools/tavily.py
index 6912c3695..1f1fa0137 100644
--- a/agent/tools/tavily.py
+++ b/agent/tools/tavily.py
@@ -103,6 +103,9 @@ class TavilySearch(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("TavilySearch processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("formalized_content", "")
             return ""
@@ -113,10 +116,16 @@ class TavilySearch(ToolBase, ABC):
             if fld not in kwargs:
                 kwargs[fld] = getattr(self._param, fld)
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("TavilySearch processing"):
+                return
+
             try:
                 kwargs["include_images"] = False
                 kwargs["include_raw_content"] = False
                 res = self.tavily_client.search(**kwargs)
+                if self.check_if_canceled("TavilySearch processing"):
+                    return
+
                 self._retrieve_chunks(res["results"],
                                       get_title=lambda r: r["title"],
                                       get_url=lambda r: r["url"],
@@ -125,6 +134,9 @@ class TavilySearch(ToolBase, ABC):
                 self.set_output("json", res["results"])
                 return self.output("formalized_content")
             except Exception as e:
+                if self.check_if_canceled("TavilySearch processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"Tavily error: {e}")
                 time.sleep(self._param.delay_after_error)
@@ -201,6 +213,9 @@ class TavilyExtract(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 10*60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("TavilyExtract processing"):
+            return
+
         self.tavily_client = TavilyClient(api_key=self._param.api_key)
         last_e = None
         for fld in ["urls", "extract_depth", "format"]:
@@ -209,12 +224,21 @@ class TavilyExtract(ToolBase, ABC):
         if kwargs.get("urls") and isinstance(kwargs["urls"], str):
             kwargs["urls"] = kwargs["urls"].split(",")
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("TavilyExtract processing"):
+                return
+
             try:
                 kwargs["include_images"] = False
                 res = self.tavily_client.extract(**kwargs)
+                if self.check_if_canceled("TavilyExtract processing"):
+                    return
+
                 self.set_output("json", res["results"])
                 return self.output("json")
             except Exception as e:
+                if self.check_if_canceled("TavilyExtract processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"Tavily error: {e}")
         if last_e:
diff --git a/agent/tools/tushare.py b/agent/tools/tushare.py
index bb9d34fe9..6a0d0c2a3 100644
--- a/agent/tools/tushare.py
+++ b/agent/tools/tushare.py
@@ -43,12 +43,18 @@ class TuShare(ComponentBase, ABC):
     component_name = "TuShare"
 
     def _run(self, history, **kwargs):
+        if self.check_if_canceled("TuShare processing"):
+            return
+
         ans = self.get_input()
         ans = ",".join(ans["content"]) if "content" in ans else ""
         if not ans:
             return TuShare.be_output("")
 
         try:
+            if self.check_if_canceled("TuShare processing"):
+                return
+
             tus_res = []
             params = {
                 "api_name": "news",
@@ -58,12 +64,18 @@ class TuShare(ComponentBase, ABC):
             }
             response = requests.post(url="http://api.tushare.pro", data=json.dumps(params).encode('utf-8'))
             response = response.json()
+            if self.check_if_canceled("TuShare processing"):
+                return
             if response['code'] != 0:
                 return TuShare.be_output(response['msg'])
             df = pd.DataFrame(response['data']['items'])
             df.columns = response['data']['fields']
+            if self.check_if_canceled("TuShare processing"):
+                return
             tus_res.append({"content": (df[df['content'].str.contains(self._param.keyword, case=False)]).to_markdown()})
         except Exception as e:
+            if self.check_if_canceled("TuShare processing"):
+                return
             return TuShare.be_output("**ERROR**: " + str(e))
 
         if not tus_res:
diff --git a/agent/tools/wencai.py b/agent/tools/wencai.py
index 7ddf27ac3..998e27a1d 100644
--- a/agent/tools/wencai.py
+++ b/agent/tools/wencai.py
@@ -70,19 +70,31 @@ class WenCai(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 12)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("WenCai processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("report", "")
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("WenCai processing"):
+                return
+
             try:
                 wencai_res = []
                 res = pywencai.get(query=kwargs["query"], query_type=self._param.query_type, perpage=self._param.top_n)
+                if self.check_if_canceled("WenCai processing"):
+                    return
+
                 if isinstance(res, pd.DataFrame):
                     wencai_res.append(res.to_markdown())
                 elif isinstance(res, dict):
                     for item in res.items():
+                        if self.check_if_canceled("WenCai processing"):
+                            return
+
                         if isinstance(item[1], list):
                             wencai_res.append(item[0] + "\n" + pd.DataFrame(item[1]).to_markdown())
                         elif isinstance(item[1], str):
@@ -100,6 +112,9 @@ class WenCai(ToolBase, ABC):
                 self.set_output("report", "\n\n".join(wencai_res))
                 return self.output("report")
             except Exception as e:
+                if self.check_if_canceled("WenCai processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"WenCai error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/wikipedia.py b/agent/tools/wikipedia.py
index 8dcddc9b9..8e0b9c3fe 100644
--- a/agent/tools/wikipedia.py
+++ b/agent/tools/wikipedia.py
@@ -66,17 +66,26 @@ class Wikipedia(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("Wikipedia processing"):
+            return
+
         if not kwargs.get("query"):
             self.set_output("formalized_content", "")
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("Wikipedia processing"):
+                return
+
             try:
                 wikipedia.set_lang(self._param.language)
                 wiki_engine = wikipedia
                 pages = []
                 for p in wiki_engine.search(kwargs["query"], results=self._param.top_n):
+                    if self.check_if_canceled("Wikipedia processing"):
+                        return
+
                     try:
                         pages.append(wikipedia.page(p))
                     except Exception:
@@ -87,6 +96,9 @@ class Wikipedia(ToolBase, ABC):
                                       get_content=lambda r: r.summary)
                 return self.output("formalized_content")
             except Exception as e:
+                if self.check_if_canceled("Wikipedia processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"Wikipedia error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/agent/tools/yahoofinance.py b/agent/tools/yahoofinance.py
index 3cca93f3d..324dfb643 100644
--- a/agent/tools/yahoofinance.py
+++ b/agent/tools/yahoofinance.py
@@ -74,15 +74,24 @@ class YahooFinance(ToolBase, ABC):
 
     @timeout(int(os.environ.get("COMPONENT_EXEC_TIMEOUT", 60)))
     def _invoke(self, **kwargs):
+        if self.check_if_canceled("YahooFinance processing"):
+            return
+
         if not kwargs.get("stock_code"):
             self.set_output("report", "")
             return ""
 
         last_e = ""
         for _ in range(self._param.max_retries+1):
+            if self.check_if_canceled("YahooFinance processing"):
+                return
+
             yohoo_res = []
             try:
                 msft = yf.Ticker(kwargs["stock_code"])
+                if self.check_if_canceled("YahooFinance processing"):
+                    return
+
                 if self._param.info:
                     yohoo_res.append("# Information:\n" + pd.Series(msft.info).to_markdown() + "\n")
                 if self._param.history:
@@ -100,6 +109,9 @@ class YahooFinance(ToolBase, ABC):
                 self.set_output("report", "\n\n".join(yohoo_res))
                 return self.output("report")
             except Exception as e:
+                if self.check_if_canceled("YahooFinance processing"):
+                    return
+
                 last_e = e
                 logging.exception(f"YahooFinance error: {e}")
                 time.sleep(self._param.delay_after_error)
diff --git a/api/apps/canvas_app.py b/api/apps/canvas_app.py
index bd72e15b1..0ac2951ae 100644
--- a/api/apps/canvas_app.py
+++ b/api/apps/canvas_app.py
@@ -156,7 +156,7 @@ def run():
         return get_json_result(data={"message_id": task_id})
 
     try:
-        canvas = Canvas(cvs.dsl, current_user.id, req["id"])
+        canvas = Canvas(cvs.dsl, current_user.id)
     except Exception as e:
         return server_error_response(e)
 
@@ -168,8 +168,10 @@ def run():
 
             cvs.dsl = json.loads(str(canvas))
             UserCanvasService.update_by_id(req["id"], cvs.to_dict())
+
         except Exception as e:
             logging.exception(e)
+            canvas.cancel_task()
             yield "data:" + json.dumps({"code": 500, "message": str(e), "data": False}, ensure_ascii=False) + "\n\n"
 
     resp = Response(sse(), mimetype="text/event-stream")
@@ -177,6 +179,7 @@ def run():
     resp.headers.add_header("Connection", "keep-alive")
     resp.headers.add_header("X-Accel-Buffering", "no")
     resp.headers.add_header("Content-Type", "text/event-stream; charset=utf-8")
+    resp.call_on_close(lambda: canvas.cancel_task())
     return resp
 
 
@@ -430,7 +433,7 @@ def test_db_connect():
             catalog, schema = _parse_catalog_schema(req["database"])
             if not catalog:
                 return server_error_response("For Trino, 'database' must be 'catalog.schema' or at least 'catalog'.")
-            
+
             http_scheme = "https" if os.environ.get("TRINO_USE_TLS", "0") == "1" else "http"
 
             auth = None
@@ -603,4 +606,4 @@ def download():
     id = request.args.get("id")
     created_by = request.args.get("created_by")
     blob = FileService.get_blob(created_by, id)
-    return flask.make_response(blob)
\ No newline at end of file
+    return flask.make_response(blob)
diff --git a/rag/svr/task_executor.py b/rag/svr/task_executor.py
index 44f29162c..1de9c1646 100644
--- a/rag/svr/task_executor.py
+++ b/rag/svr/task_executor.py
@@ -24,7 +24,6 @@ import time
 
 import json_repair
 
-from api.db.services.canvas_service import UserCanvasService
 from api.db.services.knowledgebase_service import KnowledgebaseService
 from api.db.services.pipeline_operation_log_service import PipelineOperationLogService
 from common.connection_utils import timeout
@@ -33,7 +32,6 @@ from common.log_utils import init_root_logger
 from common.config_utils import show_configs
 from graphrag.general.index import run_graphrag_for_kb
 from graphrag.utils import get_llm_cache, set_llm_cache, get_tags_from_cache, set_tags_to_cache
-from rag.flow.pipeline import Pipeline
 from rag.prompts.generator import keyword_extraction, question_proposal, content_tagging, run_toc_from_text
 import logging
 import os
@@ -478,6 +476,9 @@ async def embedding(docs, mdl, parser_config=None, callback=None):
 
 
 async def run_dataflow(task: dict):
+    from api.db.services.canvas_service import UserCanvasService
+    from rag.flow.pipeline import Pipeline
+
     task_start_ts = timer()
     dataflow_id = task["dataflow_id"]
     doc_id = task["doc_id"]
@@ -944,6 +945,7 @@ async def do_handle_task(task):
 
 
 async def handle_task():
+
     global DONE_TASKS, FAILED_TASKS
     redis_msg, task = await collect()
     if not task: