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https://issues.apache.org/jira/browse/KAFKA-4577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15823347#comment-15823347
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huxi commented on KAFKA-4577:
-----------------------------
I suspect the TopicDeletionManager instance in KafkaController is null although
the controller should have created an instance of that during the
initialization. Could you check logs to see if controller has been failed over
to another broker?
> NPE in ControllerChannelManager.scala::addUpdateMetadataRequestForBrokers
> --------------------------------------------------------------------------
>
> Key: KAFKA-4577
> URL: https://issues.apache.org/jira/browse/KAFKA-4577
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.10.1.0
> Reporter: Scott Reynolds
>
> Seems as if either deleteTopicManager or deleteTopicManager.
> partitionsToBeDeleted wasn't set ?
> {code}
> java.lang.NullPointerException
> at
> kafka.controller.ControllerBrokerRequestBatch.addUpdateMetadataRequestForBrokers
> (ControllerChannelManager.scala:331)
> at kafka.controller.KafkaController.sendUpdateMetadataRequest
> (KafkaController.scala:1023)
> at
> kafka.controller.IsrChangeNotificationListener.kafka$controller$IsrChangeNotificationListener$$processUpdateNotifications
> (KafkaController.scala:1371)
> at
> kafka.controller.IsrChangeNotificationListener$$anonfun$handleChildChange$1.apply$mcV$sp
> (KafkaController.scala:1358)
> at
> kafka.controller.IsrChangeNotificationListener$$anonfun$handleChildChange$1.apply
> (KafkaController.scala:1351)
> at
> kafka.controller.IsrChangeNotificationListener$$anonfun$handleChildChange$1.apply
> (KafkaController.scala:1351)
> at kafka.utils.CoreUtils$.inLock (CoreUtils.scala:234)
> at kafka.controller.IsrChangeNotificationListener.handleChildChange
> (KafkaController.scala:1351)
> at org.I0Itec.zkclient.ZkClient$10.run (ZkClient.java:843)
> at org.I0Itec.zkclient.ZkEventThread.run (ZkEventThread.java:71)
> {code}
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