Only delete key from redis in-memory cache if present (#35126)
Fixes #35120 : the redis cache plugin keeps key/value
entries in an in-memory cache to avoid hitting the
redis database each time.
The problem is that a cache entry is only set when
a value is get or set but it is always deleted when
trying to delete a value.
When the --flush-cache ansible-playbook option is used,
the redis cache plugin is first asked to remove every
entry corresponding to every hostname present in the inventory.
As no value as been set/get so far, it then tries to delete
an unexisting value from the cache and hence crashes with
a KeyError exception.
(cherry picked from commit ee3dfef016
)
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2 changed files with 4 additions and 1 deletions
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@ -0,0 +1,2 @@
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bugfixes:
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- Only delete host key from redis in-memory cache if present.
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1
lib/ansible/plugins/cache/redis.py
vendored
1
lib/ansible/plugins/cache/redis.py
vendored
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@ -116,6 +116,7 @@ class CacheModule(BaseCacheModule):
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return (self._db.zrank(self._keys_set, key) is not None)
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def delete(self, key):
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if key in self._cache:
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del self._cache[key]
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self._db.delete(self._make_key(key))
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self._db.zrem(self._keys_set, key)
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