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MDEV-21343 Threadpool/Unix- wait_begin() function does not wake/create threads, when it should

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Fixed the condition for waking up/creating another thread.

If there is some work to do (if the request queue is not empty),
a thread should be woken or created.

The condition was incorrect since 18c9b34
This commit is contained in:
Vladislav Vaintroub
2019-12-17 22:36:26 +01:00
parent fc860d3fa3
commit 80c97f8c0c
1 changed files with 1 additions and 1 deletions
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2
sql/threadpool_unix.cc
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@ -1173,7 +1173,7 @@ void wait_begin(thread_group_t *thread_group)
DBUG_ASSERT(thread_group->connection_count > 0); DBUG_ASSERT(thread_group->connection_count > 0);
if ((thread_group->active_thread_count == 0) && if ((thread_group->active_thread_count == 0) &&
(thread_group->queue.is_empty() || !thread_group->listener)) (!thread_group->queue.is_empty() || !thread_group->listener))
{ {
/* /*
Group might stall while this thread waits, thus wake Group might stall while this thread waits, thus wake