Just a correction for use case.

Use case: kafka producer emits messages and processing messages using 
Datatorrent application, Based on the DT application logic divide the messages 
into two different groups and write it to two different kafka topics

Thanks,
Srinivas


From: Bandaru, Srinivas [mailto:srinivas.band...@optum.com]
Sent: Wednesday, October 12, 2016 1:25 PM
To: users@apex.apache.org
Cc: Singh, Jaspal
Subject: KafkaSinglePortExactlyOnceOutputOperator

Hi, Need some help with the errors we are having with" 
KafkaSinglePortExactlyOnceOutputOperator". When monitoring the application, We 
are observing that the operator getting inactive and  restarts continuously. 
Could anyone help us with identifying an issue?

Use case: kafka producer emits messages and processing messages using 
Datatorrent application, Based on the DT application logic divide the messages 
into two different groups and write it to two different Mapr strem topics.



Resource manager log snippet.
2016-10-12 10:42:35,134 INFO 
org.apache.apex.malhar.kafka.KafkaSinglePortExactlyOnceOutputOperator: Rebuild 
the partial window after 6340600660773306680
2016-10-12 10:40:29,603 INFO com.example.datatorrent.TenantUpdateValidator: 
error
2016-10-12 10:40:29,605 ERROR com.datatorrent.stram.engine.StreamingContainer: 
Operator set 
[OperatorDeployInfo[id=3,name=topicUpdate,type=GENERIC,checkpoint={57fe56b50000012b,
 0, 
0},inputs=[OperatorDeployInfo.InputDeployInfo[portName=inputPort,streamId=jsonObject,sourceNodeId=2,sourcePortName=out,locality=<null>,partitionMask=0,partitionKeys=<null>]],outputs=[]]]
 stopped running due to an exception.
java.lang.RuntimeException: Violates Exactly once. Not all the tuples received 
after operator reset.
                at 
org.apache.apex.malhar.kafka.KafkaSinglePortExactlyOnceOutputOperator.endWindow(KafkaSinglePortExactlyOnceOutputOperator.java:174)
                at 
com.datatorrent.stram.engine.GenericNode.processEndWindow(GenericNode.java:146)
                at 
com.datatorrent.stram.engine.GenericNode.run(GenericNode.java:357)
                at 
com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1407)
2016-10-12 10:40:29,617 INFO org.apache.kafka.clients.producer.KafkaProducer: 
Closing the Kafka producer with timeoutMillis = 9223372036854775807 ms.
2016-10-12 10:40:29,681 INFO com.datatorrent.stram.engine.StreamingContainer: 
Undeploy request: [3]
2016-10-12 10:40:29,682 INFO com.datatorrent.stram.engine.StreamingContainer: 
Undeploy complete.


2016-10-12 10:36:13,513 INFO com.datatorrent.bufferserver.server.Server: 
Received subscriber request: SubscribeRequestTuple{version=1.0, 
identifier=tcp://dbslt0080:60777/2.out.1, windowId=57fe57bf, 
type=jsonObject/3.inputPort, upstreamIdentifier=2.out.1, mask=0, 
partitions=null, bufferSize=0}
2016-10-12 10:36:15,534 ERROR 
com.datatorrent.netlet.AbstractLengthPrependerClient: Disconnecting 
Server.Subscriber{type=jsonObject/3.inputPort, mask=0, partitions=null} because 
of an exception.
java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
        at sun.nio.ch.IOUtil.read(IOUtil.java:197)
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
        at com.datatorrent.netlet.AbstractClient.read(AbstractClient.java:166)
        at 
com.datatorrent.netlet.DefaultEventLoop.handleSelectedKey(DefaultEventLoop.java:356)
        at 
com.datatorrent.netlet.OptimizedEventLoop$SelectedSelectionKeySet.forEach(OptimizedEventLoop.java:59)
        at 
com.datatorrent.netlet.OptimizedEventLoop.runEventLoop(OptimizedEventLoop.java:192)
        at 
com.datatorrent.netlet.OptimizedEventLoop.runEventLoop(OptimizedEventLoop.java:157)
        at 
com.datatorrent.netlet.DefaultEventLoop.run(DefaultEventLoop.java:156)
        at java.lang.Thread.run(Thread.java:745)


Thanks,
Srinivas


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