Fix: check task executor alive and display status (#11270)

### What problem does this PR solve?

Correctly check task executor alive and display status.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

admin/client/admin_client.py

@@ -393,7 +393,9 @@ class AdminCLI(Cmd):
                 print(f"Can't access {self.host}, port: {self.port}")
 
     def _format_service_detail_table(self, data):
-        if not any([isinstance(v, list) for v in data.values()]):
+        if isinstance(data, list):
+            return data
+        if not all([isinstance(v, list) for v in data.values()]):
             # normal table
             return data
         # handle task_executor heartbeats map, for example {'name': [{'done': 2, 'now': timestamp1}, {'done': 3, 'now': timestamp2}]
@@ -404,7 +406,7 @@ class AdminCLI(Cmd):
             task_executor_list.append({
                 "task_executor_name": k,
                 **heartbeats[0],
-            })
+            } if heartbeats else {"task_executor_name": k})
         return task_executor_list
 
     def _print_table_simple(self, data):
@@ -415,7 +417,8 @@ class AdminCLI(Cmd):
             # handle single row data
             data = [data]
 
-        columns = list(data[0].keys())
+        columns = list(set().union(*(d.keys() for d in data)))
+        columns.sort()
         col_widths = {}
 
         def get_string_width(text):

api/utils/health_utils.py

@@ -173,7 +173,8 @@ def check_task_executor_alive():
             heartbeats = [json.loads(heartbeat) for heartbeat in heartbeats]
             task_executor_heartbeats[task_executor_id] = heartbeats
         if task_executor_heartbeats:
-            return {"status": "alive", "message": task_executor_heartbeats}
+            status = "alive" if any(task_executor_heartbeats.values()) else "timeout"
+            return {"status": status, "message": task_executor_heartbeats}
         else:
             return {"status": "timeout", "message": "Not found any task executor."}
     except Exception as e:

rag/utils/redis_conn.py

@@ -110,7 +110,7 @@ class RedisDB:
         info = self.REDIS.info()
         return {
             'redis_version': info["redis_version"],
-            'server_mode': info["server_mode"],
+            'server_mode': info["server_mode"] if "server_mode" in info else info.get("redis_mode", ""),
             'used_memory': info["used_memory_human"],
             'total_system_memory': info["total_system_memory_human"],
             'mem_fragmentation_ratio': info["mem_fragmentation_ratio"],