Bug 251582

Noticed this exception in twistd.log on ews server. This error is happenning consistently for atleast past few days (in all the logs we currently have on ews server, from 2023-01-28). 2023-02-02 06:08:55-0800 [-] Got fatal Exception on DB Traceback (most recent call last): File "/usr/local/lib64/python3.6/site-packages/twisted/python/threadpool.py", line 255, in <lambda> ctx, func, *args, **kw File "/usr/local/lib64/python3.6/site-packages/twisted/python/context.py", line 118, in callWithContext return self.currentContext().callWithContext(ctx, func, *args, **kw) File "/usr/local/lib64/python3.6/site-packages/twisted/python/context.py", line 83, in callWithContext return func(*args, **kw) File "/usr/local/lib/python3.6/site-packages/buildbot/db/pool.py", line 217, in __thd log.err(e, 'Got fatal Exception on DB') --- <exception caught here> --- File "/usr/local/lib/python3.6/site-packages/buildbot/db/pool.py", line 190, in __thd rv = callable(arg, *args, **kwargs) File "/usr/local/lib/python3.6/site-packages/buildbot/db/logs.py", line 155, in thdAddLog "log with slug '%r' already exists in this step" % (slug,)) from e builtins.KeyError: "log with slug ''stdio'' already exists in this step"