[Openstack] [OpenStack] [Keystone] Problem with keystone and token, ERROR: openstack Maximum lock attempts on _lockusertokens

Daniel Spiekermann daniel.spiekermann at studium.fernuni-hagen.de
Fri Sep 4 12:27:17 UTC 2015


Hi Boris
> 
>> openstack user list
>> ERROR: openstack Maximum lock attempts on
>> _lockusertokens-041ce40b76cf4abb8fe64fae18d78403 occurred. (Disable debug
>> mode to suppress these details.) (HTTP 500) (Request-ID:
>> req-f92bb44e-ca46-4405-bc36-4305a8614c58)
> 
> This has something to do with locks used for memcache token driver. I am not 
> sure what though.
> 
> I suggest you to:
> 1. Restart memcache on the machine
I did this for more than 10 times, doesn’t matter
> 2. If that won't help and you don't want to debug, use SQL as token driver 
> (set [token] driver = keystone.token.persistence.backends.sql.Token).
That’s it, now it works fine
> If you want to debug, try poking things in keystone/common/kvs/core.py.
Well, at least my coding experience is too bad to debug seriously ;-)

Thx for your help
> 
> 
>> Thanks
>> Daniel
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> 
> -- 
> С наилучшими пожеланиями,
> Boris
> 
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