7yl4r commented on issue #16025:
URL: https://github.com/apache/airflow/issues/16025#issuecomment-854208653


   I'm dealing with this too (but mine is 100% of the time on one system only). 
   
   After researching it looks like this is an old issue that seems to keep 
popping up after being "fixed".
   These resources haven't fixed my problem but there are some ideas that might 
be relevant to your setup:
   
   * [some general ideas on astronomer 
forum](https://forum.astronomer.io/t/log-file-does-not-exist/277). The most 
important seems to be insufficient RAM.
   * [thread that suggests hostname could be 
changing](https://www.debugcn.com/en/article/31263944.html).
   
   I suspect you are also seeing [Airflow JIRA issue *If a task crashes, 
hostname not committed to db so logs not in the 
UI*](https://issues.apache.org/jira/browse/AIRFLOW-4922) which is a symptom of 
the `Celery command failed on host`? I am.
   
   Do you have one worker failing consistenly among other workers suceesding or 
are your failures on a worker which is also succeeding sometimes?


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