Public bug reported:
If you use redis as a caching backend and you delete a server with
no consoleauth tokens you'll get a stacktrace as an empty list is
passed down to the redis client and ultimately the redis server
which responds with an error, complaining about a wrong number
of arguments for the del command.
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
[req-cc86f95f-00aa-428a-8920-4f0ea478887b a6f683db07b747188336d9a2ebe1c1c2
0e8a0eaa143c4af3938db81fc9df5abf - default default] Exception during message
handling: ResponseError: wrong number of arguments for 'del' command
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server Traceback (most
recent call last):
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 163, in
_process_incoming
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server res =
self.dispatcher.dispatch(message)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 220,
in dispatch
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server return
self._do_dispatch(endpoint, method, ctxt, args)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 190,
in _do_dispatch
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server result =
func(ctxt, **new_args)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/nova/consoleauth/manager.py", line 142, in
delete_tokens_for_instance
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
[tok.encode('UTF-8') for tok in tokens])
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/nova/cache_utils.py", line 130, in
delete_multi
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server return
self.region.delete_multi(keys)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/dogpile/cache/region.py", line 1017, in
delete_multi
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
self.backend.delete_multi(keys)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/dogpile/cache/backends/redis.py", line 183,
in delete_multi
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
self.client.delete(*keys)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/redis/client.py", line 824, in delete
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server return
self.execute_command('DEL', *names)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/redis/client.py", line 565, in execute_command
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server return
self.parse_response(connection, command_name, **options)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/redis/client.py", line 577, in parse_response
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server response =
connection.read_response()
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/redis/connection.py", line 574, in
read_response
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server raise response
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server ResponseError:
wrong number of arguments for 'del' command
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
** Affects: nova
Importance: Low
Assignee: Christoph Manns (christoph-manns)
Status: In Progress
** Tags: consoleauth redis
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https://bugs.launchpad.net/bugs/1794812
Title:
Redis caching backend throws stacktraces
Status in OpenStack Compute (nova):
In Progress
Bug description:
If you use redis as a caching backend and you delete a server with
no consoleauth tokens you'll get a stacktrace as an empty list is
passed down to the redis client and ultimately the redis server
which responds with an error, complaining about a wrong number
of arguments for the del command.
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
[req-cc86f95f-00aa-428a-8920-4f0ea478887b a6f683db07b747188336d9a2ebe1c1c2
0e8a0eaa143c4af3938db81fc9df5abf - default default] Exception during message
handling: ResponseError: wrong number of arguments for 'del' command
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server Traceback (most
recent call last):
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 163, in
_process_incoming
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server res =
self.dispatcher.dispatch(message)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 220,
in dispatch
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server return
self._do_dispatch(endpoint, method, ctxt, args)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 190,
in _do_dispatch
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server result =
func(ctxt, **new_args)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/nova/consoleauth/manager.py", line 142, in
delete_tokens_for_instance
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
[tok.encode('UTF-8') for tok in tokens])
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/nova/cache_utils.py", line 130, in
delete_multi
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server return
self.region.delete_multi(keys)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/dogpile/cache/region.py", line 1017, in
delete_multi
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
self.backend.delete_multi(keys)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/dogpile/cache/backends/redis.py", line 183,
in delete_multi
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
self.client.delete(*keys)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/redis/client.py", line 824, in delete
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server return
self.execute_command('DEL', *names)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/redis/client.py", line 565, in execute_command
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server return
self.parse_response(connection, command_name, **options)
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/redis/client.py", line 577, in parse_response
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server response =
connection.read_response()
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server File
"/usr/lib/python2.7/site-packages/redis/connection.py", line 574, in
read_response
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server raise
response
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server ResponseError:
wrong number of arguments for 'del' command
2018-09-27 12:42:57.201 5014 ERROR oslo_messaging.rpc.server
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