Asyncio error Task was destroyed but it is pending!

[clemlesne]

Once each minute (5 workers), the error logs spawn:

Impact:

Seems none. Need to investigate.

Short logs:

ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86588' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>

Related:

• [Question]: Task was destroyed but it is pending! in route.abort() microsoft/playwright-python#1402

Full logs:

ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86588' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86623' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86711' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86727' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86739' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86801' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86845' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86874' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86880' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-86945' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87002' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87017' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87024' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87096' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87126' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87182' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87197' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87206' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87254' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87356' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>
ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending name='Task-87365' coro=<Page._on_route() running at playwright/_impl/_page.py:282> wait_for=<Future pending cb=[Task.task_wakeup()]> cb=[AsyncIOEventEmitter._emit_run.<locals>.callback() at pyee/asyncio.py:69]>

[d-balaskas]

We faced the same error as well this week. Do you have any clue why this happens?

[clemlesne]

It is a warning from asyncio indicating that an asynchronous task has been terminated.

This seems to occur when the page or browser is closed while a load is still in progress (background calls, Ajax, API requests, deferred loading, etc.).

Since the application filters each network call for ads and network monitoring using an asynchronous method, these tasks can be abruptly terminated.

I don’t want to implement a large try/except block for this error because it could originate from other parts of the code, which would increase the complexity of debugging and hinder understanding of the issues.

If you have any suggestions, feel free to share!