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Re: e8ca684: MDEV-11221 - main.events_restart failed in bb


Hi, Sergey!

Ok to push!

On Feb 28, Sergey Vojtovich wrote:
> revision-id: e8ca684c6d5ce14eb021b4b691be50a8bf9c8281 (mariadb-10.0.29-38-ge8ca684)
> parent(s): b54566d73bb96ef9eb7d734742d3743fb3369a40
> committer: Sergey Vojtovich
> timestamp: 2017-02-28 15:23:44 +0400
> message:
> MDEV-11221 - main.events_restart failed in bb
> Applied lost in a merge revision:

next time, please specify a commit you're applying. Like

  Applied commit 7f38a070baa that was lost in a merge:

> MDEV-10043 - main.events_restart fails sporadically in buildbot (crashes upon
>              shutdown)
> There was race condition between shutdown thread and event worker threads.
> Shutdown thread waits for thread_count to become 0 in close_connections(). It
> may happen so that event worker thread was started but didn't increment
> thread_count by this time. In this case shutdown thread may miss wait for this
> working thread and continue deinitialization. Worker thread in turn may continue
> execution and crash on deinitialized data.
> Fixed by incrementing thread_count before thread is actually created like it is
> done for connection threads.
> Also let event scheduler not to inc/dec running threads counter for symmetry
> with other "service" threads.
Chief Architect MariaDB
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