Fix couch_server concurrency error
Its possible that a busy couch_server and a specific ordering and timing
of events can end up with an open_async message in the mailbox while a
new and unrelated open_async process is spawned. This change just ensure
that if we encounter any old messages in the mailbox that we ignore
them.
The underlying issue here is that a delete request clears out the state
in our couch_dbs ets table while not clearing out state in the message
queue. In some fairly specific circumstances this leads to the message
on in the mailbox satisfying an ets entry for a newer open_async
process. This change just includes a match on the opener process.
Anything unmatched came before the current open_async request which
means it should be ignored.
2 files changed
