Dany Benjamin created KAFKA-3172:
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Summary: 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
Fix For: 0.9.0.0
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)
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