Hi All,
We have a typical cluster of 3 kafka instances backed by 3 zookeeper instances
(kafka version 0.8.1.1, scala version 2.10.3, java version 1.7.0_65). On
consumer end, when some of our consumers were getting recycled, we found a
troubling recursion which was taking a busy lock and blocking our consumers
thread pool. I'll appreciate if anyone can provide an insight on how to
mitigate the blocking logic. On the zookeeper util front (ZkUtils.scala) is
there a possibility to switch to a better JSON parser based upon this finding
http://engineering.ooyala.com/blog/comparing-scala-json-libraries?
Thanks,jsh
-------------------------Recursive BLOCKING
thread-------------------------------"Sa863f22b1e5hjh6788991800900b34545c_profile-a-prod1-s-140789080845312-c397945e8_watcher_executor"
prio=10 tid=0x00007f24dc285800 nid=0xda9 runnable [0x00007f249e40b000]
java.lang.Thread.State: RUNNABLE at
scala.util.parsing.combinator.Parsers$$anonfun$rep1$1.p$7(Parsers.scala:722)
at
scala.util.parsing.combinator.Parsers$$anonfun$rep1$1.continue$1(Parsers.scala:726)
at
scala.util.parsing.combinator.Parsers$$anonfun$rep1$1.apply(Parsers.scala:737)
at
scala.util.parsing.combinator.Parsers$$anonfun$rep1$1.apply(Parsers.scala:721)
at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Success.flatMapWithNext(Parsers.scala:142)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
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at
scala.util.parsing.combinator.lexical.Scanners$Scanner.rest(Scanners.scala:60)
at
scala.util.parsing.combinator.lexical.Scanners$Scanner.rest(Scanners.scala:44)
at
scala.util.parsing.combinator.Parsers$$anonfun$acceptIf$1.apply(Parsers.scala:608)
at
scala.util.parsing.combinator.Parsers$$anonfun$acceptIf$1.apply(Parsers.scala:606)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Success.flatMapWithNext(Parsers.scala:142)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Success.flatMapWithNext(Parsers.scala:142)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Success.flatMapWithNext(Parsers.scala:142)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$$anonfun$rep1$1.apply(Parsers.scala:736)
at
scala.util.parsing.combinator.Parsers$$anonfun$rep1$1.apply(Parsers.scala:721)
at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Success.flatMapWithNext(Parsers.scala:142)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Success.flatMapWithNext(Parsers.scala:142)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$flatMap$1.apply(Parsers.scala:239)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
at
scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
at
scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
at
scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
at scala.util.parsing.combinator.Parsers$$anon$2.apply(Parsers.scala:890)
at scala.util.parsing.json.JSON$.parseRaw(JSON.scala:54) at
scala.util.parsing.json.JSON$.parseFull(JSON.scala:68) at
kafka.utils.Json$.liftedTree1$1(Json.scala:37) at
kafka.utils.Json$.parseFull(Json.scala:36) - locked <0x00000000c5a7cdd8>
(a java.lang.Object) at
kafka.consumer.TopicCount$.constructTopicCount(TopicCount.scala:56) at
kafka.utils.ZkUtils$$anonfun$getConsumersPerTopic$1.apply(ZkUtils.scala:678)
at
kafka.utils.ZkUtils$$anonfun$getConsumersPerTopic$1.apply(ZkUtils.scala:677)
at scala.collection.Iterator$class.foreach(Iterator.scala:727) at
scala.collection.AbstractIterator.foreach(Iterator.scala:1157) at
scala.collection.IterableLike$class.foreach(IterableLike.scala:72) at
scala.collection.AbstractIterable.foreach(Iterable.scala:54) at
kafka.utils.ZkUtils$.getConsumersPerTopic(ZkUtils.scala:677) at
kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener.kafka$consumer$ZookeeperConsumerConnector$ZKRebalancerListener$$rebalance(ZookeeperConsumerConnector.scala:437)
at
kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener$$anonfun$syncedRebalance$1.apply$mcVI$sp(ZookeeperConsumerConnector.scala:408)
at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:141)
at
kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener.syncedRebalance(ZookeeperConsumerConnector.scala:402)
- locked <0x00000000d3a7e1d0> (a java.lang.Object)
at
kafka.consumer.ZookeeperConsumerConnector$ZKRebalancerListener$$anon$1.run(ZookeeperConsumerConnector.scala:355)
-------------many BLOCKED Threads had stack
trace-------------------"application-my-context-105" prio=10
tid=0x00007f24e45aa800 nid=0x3494 waiting for monitor entry
[0x00007f24afe26000] java.lang.Thread.State: BLOCKED (on object monitor)
at
kafka.consumer.ZookeeperConsumerConnector.shutdown(ZookeeperConsumerConnector.scala:161)
- waiting to lock <0x00000000d3a7e1d0> (a java.lang.Object) at
kafka.javaapi.consumer.ZookeeperConsumerConnector.shutdown(ZookeeperConsumerConnector.scala:110)
at com.custom1.Consumer.cancel(Consumer.java:312) at
com.custom1.Consumer.run(Consumer.java:302) at
akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:42) at
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at
scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)-------------------------------------------------------------------
