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External Plugin插件问题或新增插件 / Issues on plugin itself插件问题或新增插件 / Issues on plugin itselfIM: wecom企业微信 适配器相关 / WeCom and WeComCS adapter related企业微信 适配器相关 / WeCom and WeComCS adapter relatedbug?Bug或Bug修复相关 / maybe a bugBug或Bug修复相关 / maybe a bugm: Plugins插件加载及管理模块 / Plugins loading and management插件加载及管理模块 / Plugins loading and management
Description
Runtime environment
v4.6.2, Ubuntu 24.04 x64 Python 3.12.7, Docker version 27.5.1
Exception
主要问题:
- 使用Markdowm2ing插件时,处理Dify知识库返回的Markdown图片格式时出现ActionCallTimeoutError
- Dify知识库返回的图片链接存在签名时效性问题,直接在浏览器打开时返回404错误
详细错误日志:
[12-05 18:16:54.596] pipelinemgr.py (253) - [ERROR] : Error processing query 0 stage=ResponseWrapper : ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
[12-05 18:16:54.602] pipelinemgr.py (254) - [ERROR] : Traceback: Traceback (most recent call last):
File "/app/.venv/lib/python3.12/site-packages/langbot_plugin/runtime/io/handler.py", line 175, in call_action
raise ActionCallError(f"{response.message}")
langbot_plugin.entities.io.errors.ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 250, in process_query
await self._execute_from_stage(0, query)
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 217, in _execute_from_stage
await self._execute_from_stage(i + 1, query)
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 206, in _execute_from_stage
async for sub_result in result:
File "/app/src/langbot/pkg/pipeline/wrapper/wrapper.py", line 77, in process
event_ctx = await self.ap.plugin_connector.emit_event(event, bound_plugins)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/src/langbot/pkg/plugin/connector.py", line 405, in emit_event
event_ctx_result = await self.handler.emit_event(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/src/langbot/pkg/plugin/handler.py", line 560, in emit_event
result = await self.call_action(
^^^^^^^^^^^^^^^^^^^^^^^
File "/app/.venv/lib/python3.12/site-packages/langbot_plugin/runtime/io/handler.py", line 180, in call_action
raise ActionCallError(f"{e.__class__.__name__}: {str(e)}")
langbot_plugin.entities.io.errors.ActionCallError: ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
补充现象:
- 在浏览器直接打开Dify知识库返回的Markdown图片链接时,返回:
{"code":"not_found","message":"File not found or signature is invalid","status":404}
- 在Langbot流水线对话调试中:
- 关闭所有插件时:Dify知识库的Markdown格式图片信息正确渲染
- 开启所有插件时(包括添加或不添加Markdowm2ing插件,只点击开启按钮):同样报ActionCallTimeoutError错误
Reproduction steps
环境配置:
- Dify和Langbot部署在同一台 Ubuntu 服务器上,均使用Docker容器运行
2 已安装playwright和chromium依赖:- 执行了
playwright install chromium - 安装了Markdowm2ing插件的requirements.txt依赖
- 执行了
重现步骤:
-
企业微信机器人配置:
- 机器人通过Langbot调用Dify智能体
- Dify知识库中包含Markdown格式的图片:

-
加载Markdowm2ing插件并在扩展集成启用插件开关:
a. 在Langbot插件市场安装并启用Markdowm2ing插件
b. 企业微信用户提问,触发Dify知识库回复包含Markdown图片
c. Langbot处理时出现ActionCallTimeoutError
[12-06 09:46:30.290] pipelinemgr.py (253) - [ERROR] : Error processing query 4 stage=ResponseWrapper : ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
[12-06 09:46:30.293] pipelinemgr.py (254) - [ERROR] : Traceback: Traceback (most recent call last):
File "/app/.venv/lib/python3.12/site-packages/langbot_plugin/runtime/io/handler.py", line 175, in call_action
raise ActionCallError(f"{response.message}")
langbot_plugin.entities.io.errors.ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 250, in process_query
await self._execute_from_stage(0, query)
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 217, in _execute_from_stage
await self._execute_from_stage(i + 1, query)
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 206, in _execute_from_stage
async for sub_result in result:
File "/app/src/langbot/pkg/pipeline/wrapper/wrapper.py", line 77, in process
event_ctx = await self.ap.plugin_connector.emit_event(event, bound_plugins)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/src/langbot/pkg/plugin/connector.py", line 405, in emit_event
event_ctx_result = await self.handler.emit_event(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/src/langbot/pkg/plugin/handler.py", line 560, in emit_event
result = await self.call_action(
^^^^^^^^^^^^^^^^^^^^^^^
File "/app/.venv/lib/python3.12/site-packages/langbot_plugin/runtime/io/handler.py", line 180, in call_action
raise ActionCallError(f"{e.__class__.__name__}: {str(e)}")
langbot_plugin.entities.io.errors.ActionCallError: ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
- 不加载任何插件但在扩展集成启用插件开关:
a. 在Langbot流水线-插件集成中,启用"启用所有插件"开关
b. 不启用任何具体插件(包括不启用Markdowm2ing)
c. 同样出现ActionCallTimeoutError错误
[12-06 09:43:31.317] pipelinemgr.py (253) - [ERROR] : Error processing query 3 stage=ResponseWrapper : ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
[12-06 09:43:31.321] pipelinemgr.py (254) - [ERROR] : Traceback: Traceback (most recent call last):
File "/app/.venv/lib/python3.12/site-packages/langbot_plugin/runtime/io/handler.py", line 175, in call_action
raise ActionCallError(f"{response.message}")
langbot_plugin.entities.io.errors.ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 250, in process_query
await self._execute_from_stage(0, query)
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 217, in _execute_from_stage
await self._execute_from_stage(i + 1, query)
File "/app/src/langbot/pkg/pipeline/pipelinemgr.py", line 206, in _execute_from_stage
async for sub_result in result:
File "/app/src/langbot/pkg/pipeline/wrapper/wrapper.py", line 77, in process
event_ctx = await self.ap.plugin_connector.emit_event(event, bound_plugins)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/src/langbot/pkg/plugin/connector.py", line 405, in emit_event
event_ctx_result = await self.handler.emit_event(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/src/langbot/pkg/plugin/handler.py", line 560, in emit_event
result = await self.call_action(
^^^^^^^^^^^^^^^^^^^^^^^
File "/app/.venv/lib/python3.12/site-packages/langbot_plugin/runtime/io/handler.py", line 180, in call_action
raise ActionCallError(f"{e.__class__.__name__}: {str(e)}")
langbot_plugin.entities.io.errors.ActionCallError: ActionCallError: ActionCallTimeoutError: Action emit_event call timed out
docker restart langbot 时日志启动时警告信息:
[12-06 09:53:44.633] longtext.py (50) - [WARNING] : Font file not found, and system font cannot be used, switch to forward message component to send long messages, you can adjust the related settings in the configuration file.
-
完全在扩展集成关闭插件开关:
a. 在Langbot流水线-插件集成中,关闭"启用所有插件"开关
b. 返回Dify知识库的Markdown格式图片信息: -
签名验证问题:
a. 从Dify知识库获取的图片链接,直接在浏览器打开时返回404
b. 错误信息:{"code":"not_found","message":"File not found or signature is invalid","status":404}
关键观察:问题不仅出现在Markdowm2ing插件,而是整个插件系统启用时都会出现ActionCallTimeoutError
Enabled plugins
插件状态配置:
- MarkDown2ing插件:
- 来源:Langbot插件市场 (https://space.langbot.app/market/Typer_Body/MarkDown2img)
docker环境库
docker exec langbot pip list
Package Version
------------------ ---------------
aiofiles 25.1.0
annotated-types 0.7.0
anyio 4.12.0
certifi 2025.11.12
charset-normalizer 3.4.4
dotenv 0.9.9
greenlet 3.3.0
h11 0.16.0
html2image 2.0.7
httpcore 1.0.9
httpx 0.28.1
idna 3.11
iniconfig 2.3.0
Jinja2 3.1.6
langbot-plugin 0.2.0
linkify-it-py 2.0.3
Markdown 3.10
markdown-it-py 4.0.0
MarkupSafe 3.0.3
mdit-py-plugins 0.5.0
mdurl 0.1.2
packaging 25.0
pip 25.3
platformdirs 4.5.1
playwright 1.56.0
pluggy 1.6.0
pydantic 2.12.5
pydantic_core 2.41.5
pydantic-settings 2.12.0
pyee 13.0.0
Pygments 2.19.2
pymdown-extensions 10.17.2
pytest 9.0.1
python-dotenv 1.2.1
PyYAML 6.0.3
requests 2.32.5
rich 14.2.0
textual 6.7.1
types-aiofiles 25.1.0.20251011
types-PyYAML 6.0.12.20250915
typing_extensions 4.15.0
typing-inspection 0.4.2
uc-micro-py 1.0.3
urllib3 2.5.0
uv 0.9.15
watchdog 6.0.0
websocket-client 1.9.0
websockets 15.0.1
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Labels
External Plugin插件问题或新增插件 / Issues on plugin itself插件问题或新增插件 / Issues on plugin itselfIM: wecom企业微信 适配器相关 / WeCom and WeComCS adapter related企业微信 适配器相关 / WeCom and WeComCS adapter relatedbug?Bug或Bug修复相关 / maybe a bugBug或Bug修复相关 / maybe a bugm: Plugins插件加载及管理模块 / Plugins loading and management插件加载及管理模块 / Plugins loading and management