[KAFKA-7082] Concurrent createTopics calls may throw NodeExistsException

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.1.1, 2.0.0
• Labels: regression
• Assignee: Ismael Juma
• Reporter: Ismael Juma
• Reviewer: Jun Rao
• Created: 20/Jun/18 20:33
• Updated: 20/Jul/18 11:00
• Resolved: 21/Jun/18 23:53

Description

This exception is unexpected causing an `UnknownServerException` to be thrown back to the client. Example below:

org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = NodeExists for /config/topics/connect-configs
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:119)
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        at kafka.zookeeper.AsyncResponse.maybeThrow(ZooKeeperClient.scala:472)
        at kafka.zk.KafkaZkClient.createRecursive(KafkaZkClient.scala:1400)
        at kafka.zk.KafkaZkClient.create$1(KafkaZkClient.scala:262)
        at kafka.zk.KafkaZkClient.setOrCreateEntityConfigs(KafkaZkClient.scala:269)
        at kafka.zk.AdminZkClient.createOrUpdateTopicPartitionAssignmentPathInZK(AdminZkClient.scala:99)
        at kafka.server.AdminManager$$anonfun$2.apply(AdminManager.scala:126)
        at kafka.server.AdminManager$$anonfun$2.apply(AdminManager.scala:81)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
        at scala.collection.Iterator$class.foreach(Iterator.scala:891)
        at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
        at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
        at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
        at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)

Issue Links

• links to: GitHub Pull Request #5259