[
https://issues.apache.org/jira/browse/IGNITE-15146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Maxim Muzafarov reassigned IGNITE-15146:
----------------------------------------
Assignee: Maxim Muzafarov
> Checking the snapshot creates a large number of unused threads that do not
> terminate.
> -------------------------------------------------------------------------------------
>
> Key: IGNITE-15146
> URL: https://issues.apache.org/jira/browse/IGNITE-15146
> Project: Ignite
> Issue Type: Bug
> Affects Versions: 2.11
> Reporter: Pavel Pereslegin
> Assignee: Maxim Muzafarov
> Priority: Critical
> Fix For: 2.12
>
>
> Each new run of snapshot verification creates dozens of new threads that do
> not terminate after the procedure is complete. Over time, this can lead to an
> OutOfMemoryError and node failure.
> {code:java}
> @Test
> public void testClusterSnapshotCheckMultipleTimes() throws Exception {
> IgniteEx ignite = startGridsWithCache(3, dfltCacheCfg,
> CACHE_KEYS_RANGE);
> startClientGrid();
>
> ignite.snapshot().createSnapshot(SNAPSHOT_NAME)
> .get();
> int activeThreadsCntBefore = Thread.activeCount();
> int iterations = 10;
> for (int i = 0; i < iterations; i++)
> snp(ignite).checkSnapshot(SNAPSHOT_NAME).get();
> int createdThreads = Thread.activeCount() - activeThreadsCntBefore;
> assertTrue("Threads created: " + createdThreads, createdThreads <
> iterations);
> }
> {code}
> Reproducer shows that 10 snapshot checks add approx
> *{color:#de350b}~250{color}* new threads.
> The dump of "leaked" thread looks like this:
> {noformat}
> "binary-metadata-writer-#2208" #2249 prio=5 os_prio=0 tid=0x00007f9974087000
> nid=0x65b38 waiting on condition [0x00007f986cf9c000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <merged>(a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
> at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
> at
> org.apache.ignite.internal.processors.cache.binary.BinaryMetadataFileStore$BinaryMetadataAsyncWriter.body0(BinaryMetadataFileStore.java:460)
> at
> org.apache.ignite.internal.processors.cache.binary.BinaryMetadataFileStore$BinaryMetadataAsyncWriter.body(BinaryMetadataFileStore.java:441)
> at
> org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:120)
> at java.lang.Thread.run(Thread.java:748)
> {noformat}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
