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* Update oslo.cache from branch 'master'
  - Merge "Pass `flush_on_reconnect` to memcache pooled backend"
  - Pass `flush_on_reconnect` to memcache pooled backend
    
    If a memcache server disappears and then reconnects when multiple memcache
    servers are used (specific to the python-memcached based backends) it is
    possible that the server will contain stale data. The default is now to
    supply the ``flush_on_reconnect`` optional argument to the backend. This
    means that when the service connects to a memcache server, it will flush
    all cached data in the server. The pooled backend is more likely to
    run into issues with this as it does not explicitly use a thread.local
    for the client. The non-pooled backend was not touched, it is not
    the recommended production use-case.
    
    See the help from python-memcached:
    
        @param flush_on_reconnect: optional flag which prevents a
    	scenario that can cause stale data to be read: If there's more
    	than one memcached server and the connection to one is
    	interrupted, keys that mapped to that server will get
    	reassigned to another. If the first server comes back, those
    	keys will map to it again. If it still has its data, get()s
    	can read stale data that was overwritten on another
    	server. This flag is off by default for backwards
    	compatibility.
    
    Change-Id: I3e335261f749ad065e8abe972f4ac476d334e6b3
    closes-bug: #1819957
This commit is contained in:
Zuul 2019-04-15 14:48:52 +00:00 committed by Gerrit Code Review
parent ad5804c0d0
commit e3cb4c3fbf
1 changed files with 1 additions and 1 deletions
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oslo.cache

@ -1 +1 @@
Subproject commit 5e55865245a63ec7e5f4f518bae056b0eb4861f3
Subproject commit a8d3c14706b25bc978499d74e77acc3a92051606