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https://issues.apache.org/jira/browse/KAFKA-1415?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Manikumar resolved KAFKA-1415.
------------------------------
Resolution: Auto Closed
Closing inactive issue. The old producer is no longer supported, please upgrade
to the Java producer whenever possible.
> Async producer.send can block forever if async.ProducerSendThread dies
> ----------------------------------------------------------------------
>
> Key: KAFKA-1415
> URL: https://issues.apache.org/jira/browse/KAFKA-1415
> Project: Kafka
> Issue Type: Bug
> Components: clients, producer
> Affects Versions: 0.8.0
> Environment: kafka_2.9.2-0.8.0.jar
> Reporter: James Blackburn
> Assignee: Jun Rao
>
> We noticed that if something goes fundamentally wrong (in this case the jars
> were replaced under a running Producer's feet) then async calls to:
> {{producer.send}} can lockup forever.
> I saw in the log file the following exception logged:
> {code}
> [2014-04-17 16:45:36,484] INFO Disconnecting from cn2:9092
> (kafka.producer.SyncProducer)
> Exception in thread "ProducerSendThread-" java.lang.NoClassDefFoundError:
> kafka/producer/async/ProducerSendThread$$anonfun$run$1
> at
> kafka.producer.async.ProducerSendThread.run(ProducerSendThread.scala:46)
> Caused by: java.lang.ClassNotFoundException:
> kafka.producer.async.ProducerSendThread$$anonfun$run$1
> at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> ... 1 more
> {code}
> However my application continued running. Jstack showed that the
> producer.send calls had all locked up:
> {code}
> "SubscriberEventQueue0Executor-1" prio=10 tid=0x00002aaab0a88000 nid=0x44f5
> waiting on condition [0x0000000044ac4000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x0000000790c47918> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
> at
> java.util.concurrent.LinkedBlockingQueue.put(LinkedBlockingQueue.java:349)
> at kafka.producer.Producer$$anonfun$asyncSend$1.apply(Producer.scala:98)
> at kafka.producer.Producer$$anonfun$asyncSend$1.apply(Producer.scala:90)
> at
> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:34)
> at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:33)
> at kafka.producer.Producer.asyncSend(Producer.scala:90)
> at kafka.producer.Producer.send(Producer.scala:77)
> - locked <0x0000000791768ee8> (a java.lang.Object)
> at kafka.javaapi.producer.Producer.send(Producer.scala:33)
> at com.mi.ahl.kafka.rmds2kafka.Bridge$1.onMarketData(Bridge.java:165)
> Locked ownable synchronizers:
> - <0x0000000792205cd0> (a
> java.util.concurrent.ThreadPoolExecutor$Worker)
> "SubscriberEventQueue1Executor-2" prio=10 tid=0x00002aaab0aa0000 nid=0x4511
> waiting for monitor entry [0x0000000044dc7000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at kafka.producer.Producer.send(Producer.scala:71)
> - waiting to lock <0x0000000791768ee8> (a java.lang.Object)
> at kafka.javaapi.producer.Producer.send(Producer.scala:33)
> at com.mi.ahl.kafka.rmds2kafka.Bridge$1.onMarketData(Bridge.java:165)
> "SubscriberEventQueue2Executor-3" prio=10 tid=0x00002aaab0ab6800 nid=0x4512
> waiting for monitor entry [0x0000000044ec8000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at kafka.producer.Producer.send(Producer.scala:71)
> - waiting to lock <0x0000000791768ee8> (a java.lang.Object)
> at kafka.javaapi.producer.Producer.send(Producer.scala:33)
> at com.mi.ahl.kafka.rmds2kafka.Bridge$1.onMarketData(Bridge.java:165)
> "SubscriberEventQueue3Executor-4" prio=10 tid=0x00002aaab0ab8800 nid=0x4513
> waiting for monitor entry [0x0000000044fc9000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at kafka.producer.Producer.send(Producer.scala:71)
> - waiting to lock <0x0000000791768ee8> (a java.lang.Object)
> at kafka.javaapi.producer.Producer.send(Producer.scala:33)
> at com.mi.ahl.kafka.rmds2kafka.Bridge$1.onMarketData(Bridge.java:165)
> {code}
> *Expectation:*
> {{producer.send}} would raise if something had fundamentally broken within
> the client rather than hanging forever.
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