I might be wrong about how JNI works. Isn't a native method always executed in another process?
I was searching for the java error message "Cannot allocate memory", and it seems this happens when JVM cannot allocate memory from the OS. Given the exception is thrown from calling a native method, I think the problem is that not enough native memory can be allocated for executing the native method. Thank you~ Xintong Song On Fri, Apr 24, 2020 at 3:40 PM Stephan Ewen <se...@apache.org> wrote: > @Xintong - out of curiosity, where do you see that this tries to fork a > process? I must be overlooking something, I could only see the native > method call. > > On Fri, Apr 24, 2020 at 4:53 AM Xintong Song <tonysong...@gmail.com> > wrote: > >> @Stephan, >> I don't think so. If JVM hits the direct memory limit, you should see the >> error message "OutOfMemoryError: Direct buffer memory". >> >> Thank you~ >> >> Xintong Song >> >> >> >> On Thu, Apr 23, 2020 at 6:11 PM Stephan Ewen <se...@apache.org> wrote: >> >>> @Xintong and @Lasse could it be that the JVM hits the "Direct Memory" >>> limit here? >>> Would increasing the "taskmanager.memory.framework.off-heap.size" help? >>> >>> On Mon, Apr 20, 2020 at 11:02 AM Zahid Rahman <zahidr1...@gmail.com> >>> wrote: >>> >>>> As you can see from the task manager tab of flink web dashboard >>>> >>>> Physical Memory:3.80 GB >>>> JVM Heap Size:1.78 GB >>>> Flink Managed Memory:128 MB >>>> >>>> *Flink is only using 128M MB which can easily cause OOM* >>>> *error.* >>>> >>>> *These are DEFAULT settings.* >>>> >>>> *I dusted off an old laptop so it only 3.8 GB RAM.* >>>> >>>> What does your job metrics say ? >>>> >>>> On Mon, 20 Apr 2020, 07:26 Xintong Song, <tonysong...@gmail.com> wrote: >>>> >>>>> Hi Lasse, >>>>> >>>>> From what I understand, your problem is that JVM tries to fork some >>>>> native process (if you look at the exception stack the root exception is >>>>> thrown from a native method) but there's no enough memory for doing that. >>>>> This could happen when either Mesos is using cgroup strict mode for memory >>>>> control, or there's no more memory on the machine. Flink cannot prevent >>>>> native processes from using more memory. It can only reserve certain >>>>> amount >>>>> of memory for such native usage when requesting worker memory from the >>>>> deployment environment (in your case Mesos) and allocating Java heap / >>>>> direct memory. >>>>> >>>>> My suggestion is to try increasing the JVM overhead configuration. You >>>>> can leverage the configuration options >>>>> 'taskmanager.memory.jvm-overhead.[min|max|fraction]'. See more details in >>>>> the documentation[1]. >>>>> >>>>> Thank you~ >>>>> >>>>> Xintong Song >>>>> >>>>> >>>>> [1] >>>>> https://ci.apache.org/projects/flink/flink-docs-release-1.10/ops/config.html#taskmanager-memory-jvm-overhead-max >>>>> >>>>> On Sat, Apr 18, 2020 at 4:02 AM Zahid Rahman <zahidr1...@gmail.com> >>>>> wrote: >>>>> >>>>>> >>>>>> https://betsol.com/java-memory-management-for-java-virtual-machine-jvm/ >>>>>> >>>>>> Backbutton.co.uk >>>>>> ¯\_(ツ)_/¯ >>>>>> ♡۶Java♡۶RMI ♡۶ >>>>>> Make Use Method {MUM} >>>>>> makeuse.org >>>>>> <http://www.backbutton.co.uk> >>>>>> >>>>>> >>>>>> On Fri, 17 Apr 2020 at 14:07, Lasse Nedergaard < >>>>>> lassenedergaardfl...@gmail.com> wrote: >>>>>> >>>>>>> Hi. >>>>>>> >>>>>>> We have migrated to Flink 1.10 and face out of memory exception and >>>>>>> hopeful can someone point us in the right direction. >>>>>>> >>>>>>> We have a job that use broadcast state, and we sometimes get out >>>>>>> memory when it creates a savepoint. See stacktrack below. >>>>>>> We have assigned 2.2 GB/task manager and >>>>>>> configured taskmanager.memory.process.size : 2200m >>>>>>> In Flink 1.9 our container was terminated because OOM, so 1.10 do a >>>>>>> better job, but it still not working and the task manager is leaking mem >>>>>>> for each OOM and finial kill by Mesos >>>>>>> >>>>>>> >>>>>>> Any idea what we can do to figure out what settings we need to >>>>>>> change? >>>>>>> >>>>>>> Thanks in advance >>>>>>> >>>>>>> Lasse Nedergaard >>>>>>> >>>>>>> >>>>>>> WARN o.a.flink.runtime.state.filesystem.FsCheckpointStreamFactory - >>>>>>> Could not close the state stream for >>>>>>> s3://flinkstate/dcos-prod/checkpoints/fc9318cc236d09f0bfd994f138896d6c/chk-3509/cf0714dc-ad7c-4946-b44c-96d4a131a4fa. >>>>>>> java.io.IOException: Cannot allocate memory at >>>>>>> java.io.FileOutputStream.writeBytes(Native Method) at >>>>>>> java.io.FileOutputStream.write(FileOutputStream.java:326) at >>>>>>> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) >>>>>>> at >>>>>>> java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at >>>>>>> java.io.FilterOutputStream.flush(FilterOutputStream.java:140) at >>>>>>> java.io.FilterOutputStream.close(FilterOutputStream.java:158) at >>>>>>> com.facebook.presto.hive.s3.PrestoS3FileSystem$PrestoS3OutputStream.close(PrestoS3FileSystem.java:995) >>>>>>> at >>>>>>> org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:72) >>>>>>> at >>>>>>> org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:101) >>>>>>> at >>>>>>> org.apache.flink.fs.s3presto.common.HadoopDataOutputStream.close(HadoopDataOutputStream.java:52) >>>>>>> at >>>>>>> org.apache.flink.core.fs.ClosingFSDataOutputStream.close(ClosingFSDataOutputStream.java:64) >>>>>>> at >>>>>>> org.apache.flink.runtime.state.filesystem.FsCheckpointStreamFactory$FsCheckpointStateOutputStream.close(FsCheckpointStreamFactory.java:277) >>>>>>> at org.apache.flink.util.IOUtils.closeQuietly(IOUtils.java:263) at >>>>>>> org.apache.flink.util.IOUtils.closeAllQuietly(IOUtils.java:250) at >>>>>>> org.apache.flink.util.AbstractCloseableRegistry.close(AbstractCloseableRegistry.java:122) >>>>>>> at >>>>>>> org.apache.flink.runtime.state.AsyncSnapshotCallable.closeSnapshotIO(AsyncSnapshotCallable.java:167) >>>>>>> at >>>>>>> org.apache.flink.runtime.state.AsyncSnapshotCallable.call(AsyncSnapshotCallable.java:83) >>>>>>> at java.util.concurrent.FutureTask.run(FutureTask.java:266) at >>>>>>> org.apache.flink.runtime.concurrent.FutureUtils.runIfNotDoneAndGet(FutureUtils.java:458) >>>>>>> at >>>>>>> org.apache.flink.streaming.api.operators.OperatorSnapshotFinalizer.<init>(OperatorSnapshotFinalizer.java:53) >>>>>>> at >>>>>>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:1143) >>>>>>> at >>>>>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) >>>>>>> at >>>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) >>>>>>> at java.lang.Thread.run(Thread.java:748) >>>>>>> >>>>>>> INFO org.apache.flink.runtime.checkpoint.CheckpointCoordinator - >>>>>>> Discarding checkpoint 3509 of job fc9318cc236d09f0bfd994f138896d6c. >>>>>>> org.apache.flink.util.SerializedThrowable: Could not materialize >>>>>>> checkpoint >>>>>>> 3509 for operator Feature extraction (8/12). at >>>>>>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.handleExecutionException(StreamTask.java:1238) >>>>>>> at >>>>>>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:1180) >>>>>>> at >>>>>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) >>>>>>> at >>>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) >>>>>>> at java.lang.Thread.run(Thread.java:748) Caused by: >>>>>>> org.apache.flink.util.SerializedThrowable: java.io.IOException: Cannot >>>>>>> allocate memory at >>>>>>> java.util.concurrent.FutureTask.report(FutureTask.java:122) at >>>>>>> java.util.concurrent.FutureTask.get(FutureTask.java:192) at >>>>>>> org.apache.flink.runtime.concurrent.FutureUtils.runIfNotDoneAndGet(FutureUtils.java:461) >>>>>>> at >>>>>>> org.apache.flink.streaming.api.operators.OperatorSnapshotFinalizer.<init>(OperatorSnapshotFinalizer.java:53) >>>>>>> at >>>>>>> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:1143) >>>>>>> ... 3 common frames omitted Caused by: >>>>>>> org.apache.flink.util.SerializedThrowable: Cannot allocate memory at >>>>>>> java.io.FileOutputStream.writeBytes(Native Method) at >>>>>>> java.io.FileOutputStream.write(FileOutputStream.java:326) at >>>>>>> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) >>>>>>> at >>>>>>> java.io.BufferedOutputStream.write(BufferedOutputStream.java:95) at >>>>>>> java.io.FilterOutputStream.write(FilterOutputStream.java:77) at >>>>>>> java.io.FilterOutputStream.write(FilterOutputStream.java:125) at >>>>>>> org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:57) >>>>>>> at java.io.DataOutputStream.write(DataOutputStream.java:107) at >>>>>>> org.apache.flink.fs.s3presto.common.HadoopDataOutputStream.write(HadoopDataOutputStream.java:47) >>>>>>> at >>>>>>> org.apache.flink.core.fs.FSDataOutputStreamWrapper.write(FSDataOutputStreamWrapper.java:66) >>>>>>> at >>>>>>> org.apache.flink.runtime.state.filesystem.FsCheckpointStreamFactory$FsCheckpointStateOutputStream.write(FsCheckpointStreamFactory.java:220) >>>>>>> at java.io.DataOutputStream.write(DataOutputStream.java:107) at >>>>>>> org.apache.flink.formats.avro.utils.DataOutputEncoder.writeBytes(DataOutputEncoder.java:92) >>>>>>> at >>>>>>> org.apache.flink.formats.avro.utils.DataOutputEncoder.writeString(DataOutputEncoder.java:113) >>>>>>> at org.apache.avro.io.Encoder.writeString(Encoder.java:130) at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeString(GenericDatumWriter.java:323) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeMap(GenericDatumWriter.java:281) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:139) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:82) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:144) >>>>>>> at >>>>>>> org.apache.avro.specific.SpecificDatumWriter.writeField(SpecificDatumWriter.java:98) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:195) >>>>>>> at >>>>>>> org.apache.avro.specific.SpecificDatumWriter.writeRecord(SpecificDatumWriter.java:83) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:130) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:82) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeArray(GenericDatumWriter.java:234) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:136) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:82) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:144) >>>>>>> at >>>>>>> org.apache.avro.specific.SpecificDatumWriter.writeField(SpecificDatumWriter.java:98) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:195) >>>>>>> at >>>>>>> org.apache.avro.specific.SpecificDatumWriter.writeRecord(SpecificDatumWriter.java:83) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:130) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:82) >>>>>>> at >>>>>>> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:72) >>>>>>> at >>>>>>> org.apache.flink.formats.avro.typeutils.AvroSerializer.serialize(AvroSerializer.java:185) >>>>>>> at >>>>>>> org.apache.flink.runtime.state.HeapBroadcastState.write(HeapBroadcastState.java:109) >>>>>>> at >>>>>>> org.apache.flink.runtime.state.DefaultOperatorStateBackendSnapshotStrategy$1.callInternal(DefaultOperatorStateBackendSnapshotStrategy.java:167) >>>>>>> at >>>>>>> org.apache.flink.runtime.state.DefaultOperatorStateBackendSnapshotStrategy$1.callInternal(DefaultOperatorStateBackendSnapshotStrategy.java:108) >>>>>>> at >>>>>>> org.apache.flink.runtime.state.AsyncSnapshotCallable.call(AsyncSnapshotCallable.java:75) >>>>>>> at java.util.concurrent.FutureTask.run(FutureTask.java:266) at >>>>>>> org.apache.flink.runtime.concurrent.FutureUtils.runIfNotDoneAndGet(FutureUtils.java:458) >>>>>>> >>>>>>
