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Only attempt to flush queue if the underlying worker pool is not finished (#18593) (#18620)

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* Only attempt to flush queue if the underlying worker pool is not finished (#18593)

Backport #18593

There is a possible race whereby a worker pool could be cancelled but yet the
underlying queue is not empty. This will lead to flush-all cycling because it
cannot empty the pool.

* On shutdown of Persistant Channel Queues close datachan and empty

Partial Backport #18415

Although we attempt to empty the datachan in queues - due to
races we are better off just closing the channel and forcibly emptying
it in shutdown.

Fix #18618

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Move zero workers warning to debug

Fix #18617

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Update modules/queue/manager.go

Co-authored-by: Gusted <williamzijl7@hotmail.com>

* Update modules/queue/manager.go

Co-authored-by: Gusted <williamzijl7@hotmail.com>

Co-authored-by: Gusted <williamzijl7@hotmail.com>
This commit is contained in:
zeripath
2022-02-06 06:55:44 +00:00
committed by GitHub
parent f65e29c077
commit 36c66303df
3 changed files with 32 additions and 15 deletions
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16
modules/queue/queue_disk_channel.go
View File

@ -173,7 +173,6 @@ func (q *PersistableChannelQueue) Run(atShutdown, atTerminate func(func())) {
q.internal.(*LevelQueue).Shutdown()
GetManager().Remove(q.internal.(*LevelQueue).qid)
}
}
// Flush flushes the queue and blocks till the queue is empty
@ -252,14 +251,13 @@ func (q *PersistableChannelQueue) Shutdown() {
q.channelQueue.Wait()
q.internal.(*LevelQueue).Wait()
// Redirect all remaining data in the chan to the internal channel
go func() {
log.Trace("PersistableChannelQueue: %s Redirecting remaining data", q.delayedStarter.name)
for data := range q.channelQueue.dataChan {
_ = q.internal.Push(data)
atomic.AddInt64(&q.channelQueue.numInQueue, -1)
}
log.Trace("PersistableChannelQueue: %s Done Redirecting remaining data", q.delayedStarter.name)
}()
close(q.channelQueue.dataChan)
log.Trace("PersistableChannelQueue: %s Redirecting remaining data", q.delayedStarter.name)
for data := range q.channelQueue.dataChan {
_ = q.internal.Push(data)
atomic.AddInt64(&q.channelQueue.numInQueue, -1)
}
log.Trace("PersistableChannelQueue: %s Done Redirecting remaining data", q.delayedStarter.name)
log.Debug("PersistableChannelQueue: %s Shutdown", q.delayedStarter.name)
}