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Prevent deadlocks in persistable channel pause test (#18410)

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* Prevent deadlocks in persistable channel pause test

Because of reuse of the old paused/resumed channels in this test there
was a potential for deadlock. This PR ensures that the channels are always
reobtained.

It further adds some control code to detect hangs in future - and it
ensures that the pausing warning is not shown on shutdown.

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

* do not warn but do pause

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath
2022-01-25 23:09:57 +00:00
committed by GitHub
parent b53fd5ff90
commit 713985b1a4
2 changed files with 53 additions and 6 deletions
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11
modules/queue/workerpool.go
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@ -301,9 +301,14 @@ func (p *WorkerPool) addWorkers(ctx context.Context, cancel context.CancelFunc,
cancel()
}
if p.hasNoWorkerScaling() {
log.Warn(
"Queue: %d is configured to be non-scaling and has no workers - this configuration is likely incorrect.\n"+
"The queue will be paused to prevent data-loss with the assumption that you will add workers and unpause as required.", p.qid)
select {
case <-p.baseCtx.Done():
// Don't warn if the baseCtx is shutdown
default:
log.Warn(
"Queue: %d is configured to be non-scaling and has no workers - this configuration is likely incorrect.\n"+
"The queue will be paused to prevent data-loss with the assumption that you will add workers and unpause as required.", p.qid)
}
p.pause()
}
p.lock.Unlock()