tothandor commented on issue #13542:
URL: https://github.com/apache/airflow/issues/13542#issuecomment-818568914
I also have these symptoms with Airflow 2.0.1, though I am using a Celery
executor.
I have inspected the workers with `strace` and it seems, that they're unable
to read from some pipe:
```bash
# strace -p 259969
strace: Process 259969 attached
read(8,
```
If I check the file descriptors, it's gone missing:
```
# ls -l /proc/259969/fd/8
lr-x------. 1 airflow airflow 64 Apr 13 10:31 /proc/259969/fd/8 ->
'pipe:[864564522]'
```
And the parent process is unable to write to a socket:
```bash
# strace -p 252882
strace: Process 252882 attached
write(6, "\0\0\1t\200\4\225i\1\0\0\0\0\0\0\214\34airflow.utils.d"..., 376
```
And the socket as well is missing.
```bash
# ls -l /proc/252882/fd/6
lrwx------. 1 airflow airflow 64 Apr 13 10:30 /proc/252882/fd/6 ->
'socket:[864501296]'
```
After killing the stucked workers things start to work again for a while.
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