Hey Everyone,

I have an application that is “failing” after running for a number of hours,  I 
was wondering if there is a standard way to determine the cause for failure.

In STRAM events I see some final exceptions on containers at the end related to 
loss of socket ownership, when I click on the operator and look at the logs the 
last thing logged is a different error, both are listed below.

In the app master logs I even see a different error.

Is there a best practice to determine why an application becomes “Failed”? And 
any insight on the exceptions below?

Thanks,
Alex


App Master Log Final Lines

2016-05-10 20:20:33,862 WARN org.apache.hadoop.hdfs.DFSClient: DFSOutputStream 
ResponseProcessor exception for block 
BP-88483743-10.24.28.46-1443641081815:blk_1167862818_94520797
java.io.IOException: Bad response ERROR for block 
BP-88483743-10.24.28.46-1443641081815:blk_1167862818_94520797 from datanode 
DatanodeInfoWithStorage[10.24.28.58:50010,DS-d0329c7e-59b4-4c6b-b321-59f8c013f113,DISK]
at 
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer$ResponseProcessor.run(DFSOutputStream.java:1002)
2016-05-10 20:20:33,862 WARN org.apache.hadoop.hdfs.DFSClient: Error Recovery 
for block BP-88483743-10.24.28.46-1443641081815:blk_1167862818_94520797 in 
pipeline 
DatanodeInfoWithStorage[10.24.28.56:50010,DS-3664dd2d-8bf2-402a-badb-2016bce2c642,DISK],
 
DatanodeInfoWithStorage[10.24.28.63:50010,DS-6c2824a3-a9f1-4cef-b3f2-4069e3a596e7,DISK],
 
DatanodeInfoWithStorage[10.24.28.58:50010,DS-d0329c7e-59b4-4c6b-b321-59f8c013f113,DISK]:
 bad datanode 
DatanodeInfoWithStorage[10.24.28.58:50010,DS-d0329c7e-59b4-4c6b-b321-59f8c013f113,DISK]
2016-05-10 20:20:37,646 ERROR org.apache.hadoop.hdfs.DFSClient: Failed to close 
inode 96057235
java.io.EOFException: Premature EOF: no length prefix available
at org.apache.hadoop.hdfs.protocolPB.PBHelper.vintPrefixed(PBHelper.java:2241)
at 
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:1264)
at 
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:1234)
at 
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1375)
at 
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:1119)
at 
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:622)



Error displayed for several HDHT operators in STRAM Events:

Stopped running due to an exception. 
com.datatorrent.netlet.NetletThrowable$NetletRuntimeException: 
java.lang.UnsupportedOperationException: Client does not own the socket any 
longer!
        at 
com.datatorrent.netlet.AbstractClient$1.offer(AbstractClient.java:364)
        at 
com.datatorrent.netlet.AbstractClient$1.offer(AbstractClient.java:354)
        at com.datatorrent.netlet.AbstractClient.send(AbstractClient.java:300)
        at 
com.datatorrent.netlet.AbstractLengthPrependerClient.write(AbstractLengthPrependerClient.java:236)
        at 
com.datatorrent.netlet.AbstractLengthPrependerClient.write(AbstractLengthPrependerClient.java:190)
        at 
com.datatorrent.stram.stream.BufferServerPublisher.put(BufferServerPublisher.java:135)
        at com.datatorrent.api.DefaultOutputPort.emit(DefaultOutputPort.java:51)
        at 
com.capitalone.vault8.citadel.operators.AbstractTimedHdhtRecordWriter$2.emit(AbstractTimedHdhtRecordWriter.java:92)
        at 
com.capitalone.vault8.citadel.operators.AbstractTimedHdhtRecordWriter$2.emit(AbstractTimedHdhtRecordWriter.java:89)
        at 
com.capitalone.vault8.citadel.operators.AbstractTimedHdhtRecordWriter.processTuple(AbstractTimedHdhtRecordWriter.java:78)
        at 
com.capitalone.vault8.citadel.operators.AbstractTimedHdhtRecordWriter$1.process(AbstractTimedHdhtRecordWriter.java:85)
        at 
com.capitalone.vault8.citadel.operators.AbstractTimedHdhtRecordWriter$1.process(AbstractTimedHdhtRecordWriter.java:82)
        at com.datatorrent.api.DefaultInputPort.put(DefaultInputPort.java:79)
        at 
com.datatorrent.stram.stream.BufferServerSubscriber$BufferReservoir.sweep(BufferServerSubscriber.java:265)
        at com.datatorrent.stram.engine.GenericNode.run(GenericNode.java:252)
        at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1388)
Caused by: java.lang.UnsupportedOperationException: Client does not own the 
socket any longer!
        ... 16 more

Last lines in one of the stopped containers with above exception:
2016-05-11 08:09:43,044 WARN com.datatorrent.stram.RecoverableRpcProxy: RPC 
failure, attempting reconnect after 10000 ms (remaining 29498 ms)
java.lang.reflect.UndeclaredThrowableException
at com.sun.proxy.$Proxy18.processHeartbeat(Unknown Source)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at 
com.datatorrent.stram.RecoverableRpcProxy.invoke(RecoverableRpcProxy.java:138)
at com.sun.proxy.$Proxy18.processHeartbeat(Unknown Source)
at 
com.datatorrent.stram.engine.StreamingContainer.heartbeatLoop(StreamingContainer.java:693)
at 
com.datatorrent.stram.engine.StreamingContainer.main(StreamingContainer.java:312)
Caused by: java.io.EOFException: End of File Exception between local host is: 
"mdcilabpdn04.kdc.capitalone.com/10.24.28.53"; destination host is: 
"mdcilabpdn06.kdc.capitalone.com":49859; : java.io.EOFException; For more 
details see: http://wiki.apache.org/hadoop/EOFException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:764)
at org.apache.hadoop.ipc.Client.call(Client.java:1476)
at org.apache.hadoop.ipc.Client.call(Client.java:1403)
at 
org.apache.hadoop.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:243)
... 8 more
Caused by: java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:392)
at org.apache.hadoop.ipc.Client$Connection.receiveRpcResponse(Client.java:1075)
at org.apache.hadoop.ipc.Client$Connection.run(Client.java:970)
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