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Posted to issues@ignite.apache.org by "Vyacheslav Koptilin (Jira)" <ji...@apache.org> on 2021/03/15 11:13:00 UTC
[jira] [Assigned] (IGNITE-14248) Handle exceptions in
PartitionReservationManager.onDoneAfterTopologyUnlock properly
[ https://issues.apache.org/jira/browse/IGNITE-14248?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vyacheslav Koptilin reassigned IGNITE-14248:
--------------------------------------------
Assignee: (was: Vyacheslav Koptilin)
> Handle exceptions in PartitionReservationManager.onDoneAfterTopologyUnlock properly
> -----------------------------------------------------------------------------------
>
> Key: IGNITE-14248
> URL: https://issues.apache.org/jira/browse/IGNITE-14248
> Project: Ignite
> Issue Type: Improvement
> Components: cache
> Affects Versions: 2.9.1
> Reporter: Vladimir Pligin
> Priority: Major
>
> If an exception (or even Error) is thrown inside of the method then the node turns into some unrecoverable state. Here's an example.
> # an exchange is about to finish, it's time to invalidate partition reservations.
> # exchange thread delegates it to a thread in the management pool
> # management pool tries to allocate a new thread (maybe it's idle and therefore empty)
> # for example ulimit is reached, the error is
> java.lang.OutOfMemoryError: unable to create native thread: possibly out of memory or process/resource limits reached
> # It's being logged, no further action is taken
> # partitions are reserved forever
> Message:
>
> {code:java}
> 2021-02-25 05:52:03.242 [exchange-worker-#182] ERROR o.a.i.i.p.q.h.t.PartitionReservationManager - Unexpected exception on start reservations cleanup
> java.lang.OutOfMemoryError: unable to create native thread: possibly out of memory or process/resource limits reached
> at java.base/java.lang.Thread.start0(Native Method)
> at java.base/java.lang.Thread.start(Thread.java:803)
> at java.base/java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:937)
> at java.base/java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1343)
> at org.apache.ignite.internal.processors.closure.GridClosureProcessor.runLocal(GridClosureProcessor.java:847)
> at org.apache.ignite.internal.processors.query.h2.twostep.PartitionReservationManager.onDoneAfterTopologyUnlock(PartitionReservationManager.java:323)
> at org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionsExchangeFuture.onDone(GridDhtPartitionsExchangeFuture.java:2617)
> at org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionsExchangeFuture.onDone(GridDhtPartitionsExchangeFuture.java:159)
> at org.apache.ignite.internal.util.future.GridFutureAdapter.onDone(GridFutureAdapter.java:475)
> at org.apache.ignite.internal.processors.cache.distributed.dht.preloader.GridDhtPartitionsExchangeFuture.init(GridDhtPartitionsExchangeFuture.java:1064)
> at org.apache.ignite.internal.processors.cache.GridCachePartitionExchangeManager$ExchangeWorker.body0(GridCachePartitionExchangeManager.java:3375)
> at org.apache.ignite.internal.processors.cache.GridCachePartitionExchangeManager$ExchangeWorker.body(GridCachePartitionExchangeManager.java:3194)
> at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:119)
> at java.base/java.lang.Thread.run(Thread.java:834)
> {code}
>
>
> Code of PartitionReservationManager.onDoneAfterTopologyUnlock:
> {code:java}
> @Override public void onDoneAfterTopologyUnlock(final GridDhtPartitionsExchangeFuture fut) {
> try {
> // Must not do anything at the exchange thread. Dispatch to the management thread pool.
> ctx.closure().runLocal(() -> {
> AffinityTopologyVersion topVer = ctx.cache().context().exchange()
> .lastAffinityChangedTopologyVersion(fut.topologyVersion()); reservations.forEach((key, r) -> {
> if (r != REPLICATED_RESERVABLE && !F.eq(key.topologyVersion(), topVer)) {
> assert r instanceof GridDhtPartitionsReservation; ((GridDhtPartitionsReservation)r).invalidate();
> }
> });
> },
> GridIoPolicy.MANAGEMENT_POOL);
> }
> catch (Throwable e) {
> log.error("Unexpected exception on start reservations cleanup", e);
> }
> }
> {code}
>
>
> My vision is that there are two basic approaches:
> * to kill the node (it's already non-functional at this point), seems to be a FH job.
> * try to recover somehow (to be honest it's not clear how exactly)
> This particular OOM situation seems unrecoverable in fact. It's an environment misconfiguration. It would be great to investigate if potentially recoverable exceptions are possible to be raised inside this block.
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