[HttpFoundation][Session] Fix memcache session handler #20375
Merged
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Commit 0216e05 removed the opening of connection to memcached server on call to
open()
, because it's assumed that connection is already opened. However,close()
still closes the connection. As a result no more read/write calls can be made if session got closed, as the connection does not get reestablished.Basically MemcacheSessionHandler should follow same logic as MemcachedSessionHandler, which is exactly what this MR acomplishes.