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https://issues.apache.org/jira/browse/FLINK-16142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17040885#comment-17040885
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Thomas Wozniakowski commented on FLINK-16142:
---------------------------------------------
Here is a threaddump (just the last one this time, before the OOM):
{code}
THREAD: CardsPerDevice[MTA/HIGH]{3} -> Sink: SQS:
pattern-detector-e2e-test-signal-queue (1/1) (RUNNABLE)
CCL:org.apache.flink.util.ChildFirstClassLoader@1a5d4e34
THREAD: CloseableReaperThread (WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: DestroyJavaVM (RUNNABLE) CCL:null
THREAD: Finalizer (WAITING) CCL:null
THREAD: Flink Netty Server (0) Thread 0 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: Flink-MetricRegistry-thread-1 (TIMED_WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: Hashed wheel timer #1 (TIMED_WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: IOManager reader thread #1 (WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: IOManager writer thread #1 (WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O boss #3 (RUNNABLE) CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O boss #9 (RUNNABLE) CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O server boss #12 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O server boss #6 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O worker #1 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O worker #10 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O worker #11 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O worker #2 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O worker #4 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O worker #5 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O worker #7 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: New I/O worker #8 (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: OutputFlusher for Source: Kinesis: pattern_detector_test_stream ->
Remove Unwanted Events -> (Quorum Based Timestamps [SERVER_TIME] -> Filter NULL
keys [deviceId], Quorum Based Timestamps [DEVICE_TIME]) (TIMED_WAITING)
CCL:org.apache.flink.util.ChildFirstClassLoader@1a5d4e34
THREAD: Reference Handler (WAITING) CCL:null
THREAD: Signal Dispatcher (RUNNABLE)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: Source: Kinesis: pattern_detector_test_stream -> Remove Unwanted Events
-> (Quorum Based Timestamps [SERVER_TIME] -> Filter NULL keys [deviceId],
Quorum Based Timestamps [DEVICE_TIME]) (1/1) (RUNNABLE)
CCL:org.apache.flink.util.ChildFirstClassLoader@1a5d4e34
THREAD: Timer-0 (TIMED_WAITING) CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: Timer-1 (TIMED_WAITING) CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: Timer-5 (WAITING) CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-akka.actor.default-dispatcher-2 (WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-akka.actor.default-dispatcher-3 (WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-akka.actor.default-dispatcher-4 (WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-akka.actor.default-dispatcher-5 (TIMED_WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-akka.remote.default-remote-dispatcher-15 (TIMED_WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-akka.remote.default-remote-dispatcher-6 (WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-metrics-2 (TIMED_WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-metrics-akka.remote.default-remote-dispatcher-3 (WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-metrics-akka.remote.default-remote-dispatcher-4 (TIMED_WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-metrics-scheduler-1 (TIMED_WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: flink-scheduler-1 (TIMED_WAITING)
CCL:sun.misc.Launcher$AppClassLoader@75b84c92
THREAD: pool-3-thread-1 (WAITING) CCL:sun.misc.Launcher$AppClassLoader@75b84c92
{code}
I only see two classloaders at play here, the
sun.misc.Launcher$AppClassLoader@75b84c92 and
org.apache.flink.util.ChildFirstClassLoader@1a5d4e34. I think that looks ok
right, the AppClassLoader is just the default Flink one, and the
ChildFirstClassLoader is the one for that current running Job?
> Memory Leak causes Metaspace OOM error on repeated job submission
> -----------------------------------------------------------------
>
> Key: FLINK-16142
> URL: https://issues.apache.org/jira/browse/FLINK-16142
> Project: Flink
> Issue Type: Bug
> Components: Client / Job Submission
> Affects Versions: 1.10.0
> Reporter: Thomas Wozniakowski
> Priority: Blocker
> Fix For: 1.10.1, 1.11.0
>
>
> Hi Guys,
> We've just tried deploying 1.10.0 as it has lots of shiny stuff that fits our
> use-case exactly (RocksDB state backend running in a containerised cluster).
> Unfortunately, it seems like there is a memory leak somewhere in the job
> submission logic. We are getting this error:
> {code:java}
> 2020-02-18 10:22:10,020 INFO
> org.apache.flink.runtime.executiongraph.ExecutionGraph - OPERATOR_NAME
> switched from RUNNING to FAILED.
> java.lang.OutOfMemoryError: Metaspace
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:757)
> at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
> at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
> at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
> at
> org.apache.flink.util.ChildFirstClassLoader.loadClass(ChildFirstClassLoader.java:60)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.jmx.SdkMBeanRegistrySupport.registerMetricAdminMBean(SdkMBeanRegistrySupport.java:27)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.metrics.AwsSdkMetrics.registerMetricAdminMBean(AwsSdkMetrics.java:398)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.metrics.AwsSdkMetrics.<clinit>(AwsSdkMetrics.java:359)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.AmazonWebServiceClient.requestMetricCollector(AmazonWebServiceClient.java:728)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.AmazonWebServiceClient.isRMCEnabledAtClientOrSdkLevel(AmazonWebServiceClient.java:660)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.AmazonWebServiceClient.isRequestMetricsEnabled(AmazonWebServiceClient.java:652)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.AmazonWebServiceClient.createExecutionContext(AmazonWebServiceClient.java:611)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.AmazonWebServiceClient.createExecutionContext(AmazonWebServiceClient.java:606)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.services.kinesis.AmazonKinesisClient.executeListShards(AmazonKinesisClient.java:1534)
> at
> org.apache.flink.kinesis.shaded.com.amazonaws.services.kinesis.AmazonKinesisClient.listShards(AmazonKinesisClient.java:1528)
> at
> org.apache.flink.streaming.connectors.kinesis.proxy.KinesisProxy.listShards(KinesisProxy.java:439)
> at
> org.apache.flink.streaming.connectors.kinesis.proxy.KinesisProxy.getShardsOfStream(KinesisProxy.java:389)
> at
> org.apache.flink.streaming.connectors.kinesis.proxy.KinesisProxy.getShardList(KinesisProxy.java:279)
> at
> org.apache.flink.streaming.connectors.kinesis.internals.KinesisDataFetcher.discoverNewShardsToSubscribe(KinesisDataFetcher.java:686)
> at
> org.apache.flink.streaming.connectors.kinesis.FlinkKinesisConsumer.run(FlinkKinesisConsumer.java:287)
> at
> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
> at
> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
> {code}
> (The only change in the above text is the OPERATOR_NAME text where I removed
> some of the internal specifics of our system).
> This will reliably happen on a fresh cluster after submitting and cancelling
> our job 3 times.
> We are using the presto-s3 plugin, the CEP library and the Kinesis connector.
> Please let me know what other diagnostics would be useful.
> Tom
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