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Warning about memory leak from state update on an unmounted component causes tests to fail

See original GitHub issue

Hi. I am using the events function to make calls to my API to retrieve events. It all seems to be working but in my tests I am receiving warnings:

Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in the componentWillUnmount method.
        in CalendarDataProvider (created by FullCalendar)
        in FullCalendar (at CalendarView.tsx:47)
        ...

This issue is causing my tests to fail intermittently on the pipeline, due to the test taking too long to complete.

I have provided a CSB here (simulating the API call): https://codesandbox.io/s/charming-bas-xzpp3?file=/src/App.tsx

Steps to reproduce:

Run App.test.tsx
See CSB console to view warnings, similar to above.

Any help to solve this issue is appreciated.

Thanks.

Issue Analytics

State:
Created 3 years ago
Comments:8 (3 by maintainers)

Top GitHub Comments

2reactions

SemperFortiscommented, Apr 29, 2021

Hi @arshaw, I’ve also been running into this issue recently with the Google Calendar plugin. The delay caused by Google’s APIs cannot be changed, which causes memory leaks every time. Hopefully, this will be fixed in the near future or it will not be a viable solution to many due to this small issue.

0reactions

adrienclay36commented, Feb 13, 2022

Nothing on this?