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Vladislav Vaintroub 71015d844e MDEV-21101 unexpected wait_timeout with pool-of-threads

Due to restricted size of the threadpool, execution of client queries can
be delayed (queued) for a while. This delay was interpreted as client
inactivity, and connection is closed, if client idle time + queue time
exceeds wait_timeout.

But users did not expect queue time to be included into wait_timeout.

This patch changes the behavior. We don't close connection anymore,
if there is some unread data present on connection,
even if wait_timeout is exceeded. Unread data means that client
was not idle, it sent a query, which we did not have time to process yet.

2020-07-30 10:17:45 +02:00

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--thread-handling=pool-of-threads