[KAFKA-4811] ReplicaFetchThread may fail to create due to existing metric

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.10.2.0
• Fix Version/s: 0.11.0.0
• Component/s: replication
• Labels: newbie
• Assignee: huxihx
• Reporter: Jun Rao
• Created: 28/Feb/17 02:36
• Updated: 15/Mar/17 05:42
• Resolved: 02/Mar/17 17:56

Description

Someone reported the following error.

java.lang.IllegalArgumentException: A metric named 'MetricName [name=connection-close-rate, group=replica-fetcher-metrics, description=Connections closed per second in the window., tags=

{broker-id=1, fetcher-id=0}

]' already exists, can't register another one.
at org.apache.kafka.common.metrics.Metrics.registerMetric(Metrics.java:433)
at org.apache.kafka.common.metrics.Sensor.add(Sensor.java:249)
at org.apache.kafka.common.metrics.Sensor.add(Sensor.java:234)
at org.apache.kafka.common.network.Selector$SelectorMetrics.<init>(Selector.java:680)
at org.apache.kafka.common.network.Selector.<init>(Selector.java:140)
at kafka.server.ReplicaFetcherThread.<init>(ReplicaFetcherThread.scala:86)
at kafka.server.ReplicaFetcherManager.createFetcherThread(ReplicaFetcherManager.scala:35)
at kafka.server.AbstractFetcherManager$$anonfun$addFetcherForPartitions$2.apply(AbstractFetcherManager.scala:83)
at kafka.server.AbstractFetcherManager$$anonfun$addFetcherForPartitions$2.apply(AbstractFetcherManager.scala:78)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)
at scala.collection.immutable.Map$Map1.foreach(Map.scala:109)
at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)
at kafka.server.AbstractFetcherManager.addFetcherForPartitions(AbstractFetcherManager.scala:78)
at kafka.server.ReplicaManager.makeFollowers(ReplicaManager.scala:882)
at kafka.server.ReplicaManager.becomeLeaderOrFollower(ReplicaManager.scala:700)
at kafka.server.KafkaApis.handleLeaderAndIsrRequest(KafkaApis.scala:148)
at kafka.server.KafkaApis.handle(KafkaApis.scala:84)
at kafka.server.KafkaRequestHandler.run(KafkaRequestHandler.scala:62)
at java.lang.Thread.run(Thread.java:745)

Issue Links

• relates to: KAFKA-4900 Brokers stuck in controller re-election loop after failing to register metrics
• links to: Github Pull Request 2606