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https://issues.apache.org/jira/browse/KAFKA-6132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16221035#comment-16221035
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Piotr Nowojski commented on KAFKA-6132:
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Thanks, it worked. Build is under way, we will see an answer in 20-30 minutes.
https://travis-ci.org/pnowojski/kafka-init-deadlock/builds/293308789
> KafkaProducer.initTransactions dead locks
> -----------------------------------------
>
> Key: KAFKA-6132
> URL: https://issues.apache.org/jira/browse/KAFKA-6132
> Project: Kafka
> Issue Type: Bug
> Components: producer
> Affects Versions: 0.11.0.0, 0.11.0.1
> Environment: Travis
> Reporter: Piotr Nowojski
> Priority: Critical
>
> I have found some intermittent failures on travis when using Kafka 0.11
> transactions for writing. One of them is a apparent deadlock with the
> following stack trace:
> {code:java}
> "KafkaTestThread[19, false]" #166 prio=5 os_prio=0 tid=0x00007f4b64c29800
> nid=0x1260 waiting on condition [0x00007f4b10fa4000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000000947048a8> (a
> java.util.concurrent.CountDownLatch$Sync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
> at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
> at
> org.apache.kafka.clients.producer.internals.TransactionalRequestResult.await(TransactionalRequestResult.java:50)
> at
> org.apache.kafka.clients.producer.KafkaProducer.initTransactions(KafkaProducer.java:537)
> {code}
> I was unsuccessful to reproduce it locally, however I think I can semi
> reliably reproduce it on Travis. Scenario includes simultaneous sequence of
> instantiating new producers, calling {{KafkaProducer.initTransactions}},
> closing them interleaved with writing. I have created a stripped down version
> of this scenario as a github project:
> https://github.com/pnowojski/kafka-init-deadlock
> The code for the test scenario is here:
> https://github.com/pnowojski/kafka-init-deadlock/blob/master/src/test/java/pl/nowojski/KafkaInitDeadLockTest.java
> I have defined 30 build profiles that run this test and in case of detecting
> a dead lock (5 minutes period of inactivity), stack trace of all threads is
> being printed out. Example travis run:
> https://travis-ci.org/pnowojski/kafka-init-deadlock/builds/293256284
> as you can see deadlock occurred in 7 out of 30 builds. It seems like in this
> scenario all of them are failing/dead locking in exactly same way.
> I have observed this issue both on 0.11.0.0 and 0.11.0.1
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