fix(app_generator): improve error handling for closed file I/O operat… (#12073)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/core/app/apps/advanced_chat/app_generator.py

@@ -383,7 +383,7 @@ class AdvancedChatAppGenerator(MessageBasedAppGenerator):
         try:
             return generate_task_pipeline.process()
         except ValueError as e:
-            if e.args[0] == "I/O operation on closed file.":  # ignore this error
+            if len(e.args) > 0 and e.args[0] == "I/O operation on closed file.":  # ignore this error
                 raise GenerateTaskStoppedError()
             else:
                 logger.exception(f"Failed to process generate task pipeline, conversation_id: {conversation.id}")

api/core/app/apps/message_based_app_generator.py

@@ -76,7 +76,7 @@ class MessageBasedAppGenerator(BaseAppGenerator):
         try:
             return generate_task_pipeline.process()
         except ValueError as e:
-            if e.args[0] == "I/O operation on closed file.":  # ignore this error
+            if len(e.args) > 0 and e.args[0] == "I/O operation on closed file.":  # ignore this error
                 raise GenerateTaskStoppedError()
             else:
                 logger.exception(f"Failed to handle response, conversation_id: {conversation.id}")

api/core/app/apps/workflow/app_generator.py

@@ -309,7 +309,7 @@ class WorkflowAppGenerator(BaseAppGenerator):
         try:
             return generate_task_pipeline.process()
         except ValueError as e:
-            if e.args[0] == "I/O operation on closed file.":  # ignore this error
+            if len(e.args) > 0 and e.args[0] == "I/O operation on closed file.":  # ignore this error
                 raise GenerateTaskStoppedError()
             else:
                 logger.exception(

api/core/tools/tool_engine.py

@@ -113,7 +113,7 @@ class ToolEngine:
             error_response = f"tool invoke error: {e}"
             agent_tool_callback.on_tool_error(e)
         except ToolEngineInvokeError as e:
-            meta = e.args[0]
+            meta = e.meta
             error_response = f"tool invoke error: {meta.error}"
             agent_tool_callback.on_tool_error(e)
             return error_response, [], meta