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https://issues.apache.org/jira/browse/FLINK-8098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16259045#comment-16259045
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Stefan Richter edited comment on FLINK-8098 at 11/20/17 10:05 AM:
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>From a first glance, this does not look like a Flink problem, but more like a
>HDFS problem or some outside influence. Mappers always have their own output
>files, so concurrent writes should not be the reason for this. I have seen a
>similar problem like this in a case where a script from the user was deleting
>checkpoint files in the background and deleted the wrong files. Can we rule
>out such problems?
was (Author: srichter):
>From a first glance, this does not look like a Flink problem, but more like a
>HDFS problem or some outside influence. Mappers always have their own output
>files, so concurrent writes should not be the reason for this. I have seen a
>similar problem like this in a case where a script from the user was deleting
>checkpoint files in the background and deleted the wrong files. Can we rule
>out such problems?
It would be very helpful if you could also report which backend you are using
(e.g. RocksDB or FS) and in which mode(s) (e.g. incremental/full, async,...).
> LeaseExpiredException when using FsStateBackend for checkpointing due to
> multiple mappers tries to access the same file.
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-8098
> URL: https://issues.apache.org/jira/browse/FLINK-8098
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.3.2
> Environment: Yarn, HDFS 2.7.3, Kafka, scala streaming API, CEP
> Reporter: Shashank Agarwal
> Fix For: 1.4.0
>
>
> I am running streaming application with parallelism 6. I have enabled
> checkpointing(1000). But application gets the crash after 1-2 days. After
> analysing logs i found following trace.
> {code}
> 2017-11-17 11:19:06,696 WARN
> org.apache.flink.streaming.runtime.tasks.StreamTask - Could not
> properly clean up the async checkpoint runnable.
> java.lang.Exception: Could not properly cancel managed keyed state future.
> at
> org.apache.flink.streaming.api.operators.OperatorSnapshotResult.cancel(OperatorSnapshotResult.java:90)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.cleanup(StreamTask.java:1023)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.close(StreamTask.java:983)
> at org.apache.flink.util.IOUtils.closeQuietly(IOUtils.java:262)
> at org.apache.flink.util.IOUtils.closeAllQuietly(IOUtils.java:251)
> at
> org.apache.flink.util.AbstractCloseableRegistry.close(AbstractCloseableRegistry.java:97)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.cancel(StreamTask.java:355)
> at
> org.apache.flink.runtime.taskmanager.Task$TaskCanceler.run(Task.java:1463)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.util.concurrent.ExecutionException: java.io.IOException:
> Could not flush and close the file system output stream to
> hdfs://xyz.com:8020/flink/sux/54944cea1f566ee801656e06cdeeabbc/chk-40191/cf145018-0599-4281-b254-96600a4e4965
> in order to obtain the stream state handle
> at java.util.concurrent.FutureTask.report(FutureTask.java:122)
> at java.util.concurrent.FutureTask.get(FutureTask.java:192)
> at
> org.apache.flink.util.FutureUtil.runIfNotDoneAndGet(FutureUtil.java:43)
> at
> org.apache.flink.runtime.state.StateUtil.discardStateFuture(StateUtil.java:85)
> at
> org.apache.flink.streaming.api.operators.OperatorSnapshotResult.cancel(OperatorSnapshotResult.java:88)
> ... 8 more
> Caused by: java.io.IOException: Could not flush and close the file system
> output stream to
> hdfs://xyz.com:8020/flink/sux/54944cea1f566ee801656e06cdeeabbc/chk-40191/cf145018-0599-4281-b254-96600a4e4965
> in order to obtain the stream state handle
> at
> org.apache.flink.runtime.state.filesystem.FsCheckpointStreamFactory$FsCheckpointStateOutputStream.closeAndGetHandle(FsCheckpointStreamFactory.java:336)
> at
> org.apache.flink.runtime.checkpoint.AbstractAsyncSnapshotIOCallable.closeStreamAndGetStateHandle(AbstractAsyncSnapshotIOCallable.java:100)
> at
> org.apache.flink.runtime.state.heap.HeapKeyedStateBackend$1.performOperation(HeapKeyedStateBackend.java:351)
> at
> org.apache.flink.runtime.state.heap.HeapKeyedStateBackend$1.performOperation(HeapKeyedStateBackend.java:329)
> at
> org.apache.flink.runtime.io.async.AbstractAsyncIOCallable.call(AbstractAsyncIOCallable.java:72)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> org.apache.flink.util.FutureUtil.runIfNotDoneAndGet(FutureUtil.java:40)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask$AsyncCheckpointRunnable.run(StreamTask.java:897)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> ... 1 more
> Caused by:
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException):
> No lease
> flink/sux/54944cea1f566ee801656e06cdeeabbc/chk-40191/cf145018-0599-4281-b254-96600a4e4965
> (inode 812148671): File does not exist. [Lease. Holder:
> DFSClient_NONMAPREDUCE_1721510813_94, pendingcreates: 161]
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:3659)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFileInternal(FSNamesystem.java:3749)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFile(FSNamesystem.java:3716)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.complete(NameNodeRpcServer.java:911)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.complete(ClientNamenodeProtocolServerSideTranslatorPB.java:547)
> at
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:640)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2351)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2347)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1866)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2345)
> at org.apache.hadoop.ipc.Client.call(Client.java:1475)
> at org.apache.hadoop.ipc.Client.call(Client.java:1412)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
> at com.sun.proxy.$Proxy12.complete(Unknown Source)
> at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.complete(ClientNamenodeProtocolTranslatorPB.java:462)
> at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:191)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
> at com.sun.proxy.$Proxy13.complete(Unknown Source)
> at
> org.apache.hadoop.hdfs.DFSOutputStream.completeFile(DFSOutputStream.java:2291)
> at
> org.apache.hadoop.hdfs.DFSOutputStream.closeImpl(DFSOutputStream.java:2272)
> at
> org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:2236)
> at
> org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:72)
> at
> org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:106)
> at
> org.apache.flink.runtime.fs.hdfs.HadoopDataOutputStream.close(HadoopDataOutputStream.java:48)
> at
> org.apache.flink.core.fs.ClosingFSDataOutputStream.close(ClosingFSDataOutputStream.java:64)
> at
> org.apache.flink.runtime.state.filesystem.FsCheckpointStreamFactory$FsCheckpointStateOutputStream.closeAndGetHandle(FsCheckpointStreamFactory.java:319)
> ... 12 more
> {code}
> So may be multiple mappers were trying to write the "same file".
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