[
https://issues.apache.org/jira/browse/KAFKA-3172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15147563#comment-15147563
]
Dany Benjamin commented on KAFKA-3172:
--------------------------------------
Yes. This is the jstack dump I am getting. I started my multi-threaded consumer
with a jmx port in it and I am seeing the same 'kafka-producer-network-thread |
producer n' via Jrockit. I am running the ConsumerGroupExample modified to read
my topic.
> Consumer threads stay in 'Watiting' status and are blocked at consumer poll
> method
> ----------------------------------------------------------------------------------
>
> Key: KAFKA-3172
> URL: https://issues.apache.org/jira/browse/KAFKA-3172
> Project: Kafka
> Issue Type: Bug
> Components: consumer
> Affects Versions: 0.9.0.0
> Environment: linux
> Reporter: Dany Benjamin
> Assignee: Neha Narkhede
> Priority: Critical
> Fix For: 0.9.0.0
>
> Attachments: jmx_info.png, jstack.png, lagSample.png
>
>
> When running multiple consumers on same group (400 - for a 400 partitioned
> topic), the application for all threads blocks at consumer.poll() method. The
> timeout parameter sent in is 1.
> Stack dump:
> "pool-1-thread-198" #424 prio=5 os_prio=0 tid=0x00007f6bb6d53800 nid=0xc349
> waiting on condition [0x00007f63df8f7000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x0000000605812710> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
> at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
> at
> java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> "kafka-producer-network-thread | producer-198" #423 daemon prio=5 os_prio=0
> tid=0x00007f6bb6d52000 nid=0xc348 runnable [0x00007f63df9f8000]
> 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:86)
> - locked <0x00000006058283e8> (a sun.nio.ch.Util$2)
> - locked <0x00000006058283d8> (a
> java.util.Collections$UnmodifiableSet)
> - locked <0x0000000605828390> (a sun.nio.ch.EPollSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> 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:270)
> at
> org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:216)
> at
> org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:128)
> at java.lang.Thread.run(Thread.java:745)
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
