Unfortunately, we’re only seeing the initial connection refused exception that I posted. So, if the issue is related to the buffer server as suggested below, is that something we can mitigate? Do we need to allocate more memory to the buffer servers?
“The exception is raised due to the buffer server termination in one of the operators containers and I guess that it happens when app master tries to purge data from the buffer server.” From: Ashwin Chandra Putta <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Wednesday, November 30, 2016 at 12:07 PM To: "[email protected]" <[email protected]> Subject: Re: Connection refused exception Can you check in stram events on the gateway UI, you can select a time range to begin at the start of the application so you can see the series of events that happened in a timeline. Then you will find the first error in that list. You can find stram events in the logical tab to the right for the application in monitor page. Regards, Ashwin. On Wed, Nov 30, 2016 at 8:20 AM, Vlad Rozov <[email protected]<mailto:[email protected]>> wrote: Hmm, that is strange. I would expect an ERROR in the KafkaInputOperator around 21:01. Please check the earliest killed container log. 2016-11-24 21:01:01,839 [IPC Server handler 4 on 44453] ERROR stram.StreamingContainerManager processOperatorFailure - Initiating container restart after operator failure PTOperator[id=1,name=kafkaInputOperator] Thank you, Vlad On 11/30/16 07:17, Feldkamp, Brandon (CONT) wrote: This is the only other stacktrace I could find but it’s dated after the initial cause of failure. 2016-11-24 21:52:24,681 [14/kafkaInputOperator:KafkaInputOperator] ERROR engine.StreamingContainer run - Operator set [OperatorDeployInfo[id=14,name=kafkaInputOperator,type=INPUT,checkpoint={583786630000239f, 0, 0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=outputPort,streamId=KafkaInput -> AuthParser,bufferServer=ip-200-120-36]]]] stopped running due to an exception. java.lang.RuntimeException: replay at com.datatorrent.contrib.kafka.AbstractKafkaInputOperator.replay(AbstractKafkaInputOperator.java:330) at com.datatorrent.contrib.kafka.AbstractKafkaInputOperator.beginWindow(AbstractKafkaInputOperator.java:266) at com.datatorrent.stram.engine.InputNode.run(InputNode.java:122) at com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1407) Caused by: java.io.EOFException: Received -1 when reading from channel, socket has likely been closed. at kafka.utils.Utils$.read(Utils.scala:376) at kafka.network.BoundedByteBufferReceive.readFrom(BoundedByteBufferReceive.scala:54) at kafka.network.Receive$class.readCompletely(Transmission.scala:56) at kafka.network.BoundedByteBufferReceive.readCompletely(BoundedByteBufferReceive.scala:29) at kafka.network.BlockingChannel.receive(BlockingChannel.scala:100) at kafka.consumer.SimpleConsumer.liftedTree1$1(SimpleConsumer.scala:81) at kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:71) at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(SimpleConsumer.scala:109) at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply(SimpleConsumer.scala:109) at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply(SimpleConsumer.scala:109) at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33) at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply$mcV$sp(SimpleConsumer.scala:108) at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply(SimpleConsumer.scala:108) at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply(SimpleConsumer.scala:108) at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33) at kafka.consumer.SimpleConsumer.fetch(SimpleConsumer.scala:107) at kafka.javaapi.consumer.SimpleConsumer.fetch(SimpleConsumer.scala:47) at com.datatorrent.contrib.kafka.AbstractKafkaInputOperator.replay(AbstractKafkaInputOperator.java:304) ... 3 more 2016-11-24 21:52:24,690 [14/kafkaInputOperator:KafkaInputOperator] ERROR engine.StreamingContainer run - Shutdown of operator OperatorDeployInfo[id=14,name=kafkaInputOperator,type=INPUT,checkpoint={583786630000239f, 0, 0},inputs=[],outputs=[OperatorDeployInfo.OutputDeployInfo[portName=outputPort,streamId=KafkaInput -> AuthParser,bufferServer=ip-200-120-36]]] failed due to an exception. java.lang.NullPointerException at com.datatorrent.contrib.kafka.SimpleKafkaConsumer.close(SimpleKafkaConsumer.java:348) at org.apache.commons.io.IOUtils.closeQuietly(IOUtils.java:303) at com.datatorrent.contrib.kafka.KafkaConsumer.stop(KafkaConsumer.java:157) at com.datatorrent.contrib.kafka.AbstractKafkaInputOperator.deactivate(AbstractKafkaInputOperator.java:405) at com.datatorrent.stram.engine.Node.deactivate(Node.java:646) at com.datatorrent.stram.engine.StreamingContainer.teardownNode(StreamingContainer.java:1347) at com.datatorrent.stram.engine.StreamingContainer.access$500(StreamingContainer.java:130) at com.datatorrent.stram.engine.StreamingContainer$2.run(StreamingContainer.java:1438) From: Vlad Rozov <[email protected]><mailto:[email protected]> Organization: DataTorrent Reply-To: "[email protected]"<mailto:[email protected]> <[email protected]><mailto:[email protected]> Date: Tuesday, November 29, 2016 at 10:21 PM To: "[email protected]"<mailto:[email protected]> <[email protected]><mailto:[email protected]> Subject: Re: Connection refused exception Brandon, Is the stacktrace from the app master log or is it from a local mode run? The exception is raised due to the buffer server termination in one of the operators containers and I guess that it happens when app master tries to purge data from the buffer server. Check the operators containers logs for exceptions/errors unless the application was started in the local mode. In the later case, try to enable DEBUG level. Thank you, Vlad On 11/29/16 05:54, Feldkamp, Brandon (CONT) wrote: Hello, I’m wondering if anyone has seen a similar stack trace before as there isn’t a lot of info provided. I’m wondering if the connection refused is from one operator to another or the kafkaInputOperator being unable to connect to kafka. Any ideas? Here’s the stacktrace: 2016-11-24 21:00:51,998 [ProcessWideEventLoop] ERROR netlet.AbstractClient handleException - Exception in event loop {id=ProcessWideEventLoop, head=7418, tail=7416, capacity=1024} java.net.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) at com.datatorrent.netlet.DefaultEventLoop.handleSelectedKey(DefaultEventLoop.java:371) at com.datatorrent.netlet.OptimizedEventLoop$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) 2016-11-24 21:01:01,839 [IPC Server handler 4 on 44453] ERROR stram.StreamingContainerManager processOperatorFailure - Initiating container restart after operator failure PTOperator[id=1,name=kafkaInputOperator] 2016-11-24 21:01:01,898 [IPC Server handler 29 on 44453] ERROR stram.StreamingContainerManager processOperatorFailure - Initiating container restart after operator failure PTOperator[id=7,name=kafkaInputOperator] 2016-11-24 21:01:32,991 [IPC Server handler 24 on 44453] ERROR stram.StreamingContainerManager processOperatorFailure - Initiating container restart after operator failure PTOperator[id=13,name=kafkaInputOperator] 2016-11-24 21:01:44,189 [IPC Server handler 22 on 44453] ERROR stram.StreamingContainerManager processOperatorFailure - Initiating container restart after operator failure PTOperator[id=10,name=kafkaInputOperator] 2016-11-24 21:01:44,604 [IPC Server handler 5 on 44453] ERROR stram.StreamingContainerManager processOperatorFailure - Initiating container restart after operator failure PTOperator[id=3,name=kafkaInputOperator] 2016-11-24 21:01:44,744 [IPC Server handler 16 on 44453] ERROR stram.StreamingContainerManager processOperatorFailure - Initiating container restart after operator failure PTOperator[id=12,name=kafkaInputOperator] Thanks! Brandon ________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer. ________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer. -- Regards, Ashwin. ________________________________________________________ The information contained in this e-mail is confidential and/or proprietary to Capital One and/or its affiliates and may only be used solely in performance of work or services for Capital One. The information transmitted herewith is intended only for use by the individual or entity to which it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying or other use of, or taking of any action in reliance upon this information is strictly prohibited. If you have received this communication in error, please contact the sender and delete the material from your computer.
