Kostas, Thank you for your advise. I have posted my question to the Kafka mailing list. I think Kafka brokers are fine because no errors on producer side with 15,000 msg/sec and from OS metrics, all of my brokers receives almost the same amount of network traffic.
Thanks, Hironori 2016-06-14 22:40 GMT+09:00 Kostas Kloudas <k.klou...@data-artisans.com>: > Hello Hironori, > > The logs just show that you get stuck in the Kafka consumer polling loop, > which does not allow the consumer lock to be released. Thus the Flink > part of the consumer is never actually called. > > To my understanding this does not seem to be a Flink issue. > Or at least this is not shown from the logs. > > From googling a bit, I found this: > > http://stackoverflow.com/questions/35636739/kafka-consumer-marking-the-coordinator-2147483647-dead > > which relates the problem to network issues. > > Have you tried posting the problem also to the Kafka mailing list? > Can it be that the kafka broker fails and tries to reconnect but does not > make it? > > Kostas > > On Jun 14, 2016, at 2:59 PM, Hironori Ogibayashi <ogibaya...@gmail.com> > wrote: > > Kostas, > > I have attached a log file from one of the taskManager. (The same host > I executed jstack) > I noticed that there are lots of "Marking the coordinator 2147482645 > dead" message in the log. > MyContinuousProcessingTimeTriggerGlobal in the log is my custom > trigger which is based on > ContinuousProcessingTimeTrigger but clean up windows when it received > specific log records. > > Thanks, > Hironori > > 2016-06-14 21:23 GMT+09:00 Kostas Kloudas <k.klou...@data-artisans.com>: > > Hi Hironori, > > Could you also provide the logs of the taskManager? > > As you described, it seems that the consumer is stuck in the polling loop, > although Flink polls with > a timeout. This would normally mean that periodically it should release the > lock for the checkpoints to go through. > > The logs of the task manager can help at clarifying why this does not > happen. > > Thanks, > Kostas > > On Jun 14, 2016, at 12:48 PM, Hironori Ogibayashi <ogibaya...@gmail.com> > wrote: > > Kostas, > > Thank you for your response. > Yes, I am using latest Flink, which is 1.0.3. > > Thanks, > Hironori > > 2016-06-14 19:02 GMT+09:00 Kostas Kloudas <k.klou...@data-artisans.com>: > > Hello Hironori, > > Are you using the latest Flink version? > There were some changes in the FlinkConsumer in the latest releases. > > Thanks, > Kostas > > On Jun 14, 2016, at 11:52 AM, Hironori Ogibayashi <ogibaya...@gmail.com> > wrote: > > Hello, > > I am running Flink job which reads topics from Kafka and write results > to Redis. I use FsStatebackend with HDFS. > > I noticed that taking checkpoint takes serveral minutes and sometimes > expires. > --- > 2016-06-14 17:25:40,734 INFO > org.apache.flink.runtime.checkpoint.CheckpointCoordinator - > Completed checkpoint 1456 (in 257956 ms) > 2016-06-14 17:25:40,735 INFO > org.apache.flink.runtime.checkpoint.CheckpointCoordinator - > Triggering checkpoint 1457 @ 1465892740734 > 2016-06-14 17:35:40,735 INFO > org.apache.flink.runtime.checkpoint.CheckpointCoordinator - > Checkpoint 1457 expired before completing. > 2016-06-14 17:35:40,736 INFO > org.apache.flink.runtime.checkpoint.CheckpointCoordinator - > Triggering checkpoint 1458 @ 1465893340735 > 2016-06-14 17:45:40,736 INFO > org.apache.flink.runtime.checkpoint.CheckpointCoordinator - > Checkpoint 1458 expired before completing. > 2016-06-14 17:45:40,737 INFO > org.apache.flink.runtime.checkpoint.CheckpointCoordinator - > Triggering checkpoint 1459 @ 1465893940736 > 2016-06-14 17:55:40,738 INFO > org.apache.flink.runtime.checkpoint.CheckpointCoordinator - > Checkpoint 1459 expired before completing. > 2016-06-14 17:55:40,739 INFO > org.apache.flink.runtime.checkpoint.CheckpointCoordinator - > Triggering checkpoint 1460 @ 1465894540738 > --- > > According to WebUI, checkpoint size is just 1MB. Why checkpointing > takes so long? > > I took jstack during checkpointing. It looks that checkpointing thread > is blocked in commitOffsets. > > ---- > "Async calls on Source: Custom Source -> Flat Map (2/3)" daemon > prio=10 tid=0x00007f2b14010800 nid=0x1b89a waiting for monitor entry > [0x00007f2b3ddfc000] > java.lang.Thread.State: BLOCKED (on object monitor) > at > org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer09.commitOffsets(FlinkKafkaConsumer09.java:392) > - waiting to lock <0x0000000659111b58> (a > org.apache.kafka.clients.consumer.KafkaConsumer) > at > org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.notifyCheckpointComplete(FlinkKafkaConsumerBase.java:169) > at > org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.notifyOfCompletedCheckpoint(AbstractUdfStreamOperator.java:179) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.notifyCheckpointComplete(StreamTask.java:596) > - locked <0x0000000659111cc8> (a java.lang.Object) > at org.apache.flink.runtime.taskmanager.Task$3.run(Task.java:945) > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) > at java.util.concurrent.FutureTask.run(FutureTask.java:262) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > at java.lang.Thread.run(Thread.java:745) > --- > > Blocker is this. > > --- > "Thread-9" daemon prio=10 tid=0x00007f2b2440d000 nid=0x1b838 runnable > [0x00007f2b3dbfa000] > java.lang.Thread.State: RUNNABLE > at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method) > at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269) > at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79) > at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87) > - locked <0x0000000659457dc8> (a sun.nio.ch.Util$2) > - locked <0x0000000659457db8> (a java.util.Collections$UnmodifiableSet) > - locked <0x0000000659457108> (a sun.nio.ch.EPollSelectorImpl) > at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98) > at org.apache.kafka.common.network.Selector.select(Selector.java:425) > at org.apache.kafka.common.network.Selector.poll(Selector.java:254) > at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:256) > at > org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.clientPoll(ConsumerNetworkClient.java:320) > at > org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:213) > at > org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:193) > at > org.apache.kafka.clients.consumer.KafkaConsumer.pollOnce(KafkaConsumer.java:908) > at > org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:853) > at > org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer09$ConsumerThread.run(FlinkKafkaConsumer09.java:449) > - locked <0x0000000659111b58> (a > org.apache.kafka.clients.consumer.KafkaConsumer) > --- > > If someone could advise me of the cause or the way to investigate > further, that would be appreciated. > > Thanks, > Hironori > > > > <flink-flink-taskmanager-0-FLINK1503.log.gz> > >
