OpenWISP
[high-impact] celery: fix issue which makes celery hangs indefinitely
High impact task, not easy, will require time, patience and debugging skills.
Read the description of the issue, replicate it by creating a failing test as indicated in this comment: https://github.com/celery/celery/issues/4556#issuecomment-367969700.
Debug and track down the issue and propose a good solution, send a pull request to fix the issue.
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marfgold1