scheduleAtFixedRate would hang#42993
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henningandersen merged 4 commits intoelastic:masterfrom Jun 11, 2019
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Though not in use in elasticsearch currently, it seems surprising that ThreadPool.scheduler().scheduleAtFixedRate would hang. A recurring scheduled task is never completed (except on failure) and we test for exceptions using RunnableFuture.get(), which hangs for periodic tasks. Fixed by checking that task is done before calling .get(). Related to elastic#38441
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Pinging @elastic/es-core-infra |
ywelsch
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Jun 11, 2019
| // Scheduler only allows Runnable's so we expect no checked exceptions here. If anyone uses submit directly on `this`, we | ||
| // accept the wrapped exception in the output. | ||
| ExceptionsHelper.reThrowIfNotNull(EsExecutors.rethrowErrors(r)); | ||
| if (r instanceof RunnableFuture && ((RunnableFuture<?>) r).isDone()) { |
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should we move the isDone condition to EsExecutors.rethrowErrors instead? Or should we alternatively assert isDone there? This will possibly cover other (and future) occurrences of this as well
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I added the assertion in 3781c31, since moving the check to EsExecutors.rethrowErrors would mean that we would silently ignore if isDone was false also for non scheduled cases.
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Thanks @ywelsch , this is ready for another round. |
…ule_at_fixed_rate_deadlock
henningandersen
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Jun 11, 2019
Though not in use in elasticsearch currently, it seems surprising that ThreadPool.scheduler().scheduleAtFixedRate would hang. A recurring scheduled task is never completed (except on failure) and we test for exceptions using RunnableFuture.get(), which hangs for periodic tasks. Fixed by checking that task is done before calling .get().
henningandersen
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Jun 11, 2019
Though not in use in elasticsearch currently, it seems surprising that ThreadPool.scheduler().scheduleAtFixedRate would hang. A recurring scheduled task is never completed (except on failure) and we test for exceptions using RunnableFuture.get(), which hangs for periodic tasks. Fixed by checking that task is done before calling .get().
henningandersen
added a commit
that referenced
this pull request
Jun 11, 2019
Though not in use in elasticsearch currently, it seems surprising that ThreadPool.scheduler().scheduleAtFixedRate would hang. A recurring scheduled task is never completed (except on failure) and we test for exceptions using RunnableFuture.get(), which hangs for periodic tasks. Fixed by checking that task is done before calling .get().
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Though not in use in elasticsearch currently, it seems surprising that
ThreadPool.scheduler().scheduleAtFixedRate would hang. A recurring
scheduled task is never completed (except on failure) and we test for
exceptions using RunnableFuture.get(), which hangs for periodic tasks.
Fixed by checking that task is done before calling .get().
Related to #38441