[
https://issues.apache.org/jira/browse/KAFKA-7022?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rajini Sivaram reassigned KAFKA-7022:
-------------------------------------
Assignee: Rajini Sivaram
> Setting a very small segment.bytes can cause ReplicaFetcher threads to crash
> and in turn an unhealthy cluster due to under-replicated partitions
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-7022
> URL: https://issues.apache.org/jira/browse/KAFKA-7022
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 1.0.1
> Reporter: Koelli Mungee
> Assignee: Rajini Sivaram
> Priority: Major
>
> The topic configuration segment.bytes was changed to 14 using the alter
> command. This resulted in ReplicaFetcher threads dying with the following
> exception:
> {code:java}
> [2018-06-07 21:02:15,669] ERROR [ReplicaFetcher replicaId=7, leaderId=9,
> fetcherId=0] Error due to (kafka.server.ReplicaFetcherThread)
> kafka.common.KafkaException: Error processing data for partition test-11
> offset 2362
> at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$2$$anonfun$apply$mcV$sp$1$$anonfun$apply$2.apply(AbstractFetcherThread.scala:204)
> at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$2$$anonfun$apply$mcV$sp$1$$anonfun$apply$2.apply(AbstractFetcherThread.scala:169)
> at scala.Option.foreach(Option.scala:257)
> at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$2$$anonfun$apply$mcV$sp$1.apply(AbstractFetcherThread.scala:169)
> at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$2$$anonfun$apply$mcV$sp$1.apply(AbstractFetcherThread.scala:166)
> at
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
> at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$2.apply$mcV$sp(AbstractFetcherThread.scala:166)
> at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$2.apply(AbstractFetcherThread.scala:166)
> at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$2.apply(AbstractFetcherThread.scala:166)
> at kafka.utils.CoreUtils$.inLock(CoreUtils.scala:250)
> at
> kafka.server.AbstractFetcherThread.processFetchRequest(AbstractFetcherThread.scala:164)
> at
> kafka.server.AbstractFetcherThread.doWork(AbstractFetcherThread.scala:111)
> at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:82)
> Caused by: kafka.common.KafkaException: Trying to roll a new log segment for
> topic partition ledger-entry-request-5-11 with start offset 2362 while it
> already exists.
> at kafka.log.Log$$anonfun$roll$2.apply(Log.scala:1349)
> at kafka.log.Log$$anonfun$roll$2.apply(Log.scala:1316)
> at kafka.log.Log.maybeHandleIOException(Log.scala:1678)
> at kafka.log.Log.roll(Log.scala:1316)
> at kafka.log.Log.kafka$log$Log$$maybeRoll(Log.scala:1303)
> at kafka.log.Log$$anonfun$append$2.apply(Log.scala:726)
> at kafka.log.Log$$anonfun$append$2.apply(Log.scala:640)
> at kafka.log.Log.maybeHandleIOException(Log.scala:1678)
> at kafka.log.Log.append(Log.scala:640)
> at kafka.log.Log.appendAsFollower(Log.scala:623)
> at
> kafka.cluster.Partition$$anonfun$appendRecordsToFollower$1.apply(Partition.scala:560)
> at
> kafka.cluster.Partition$$anonfun$appendRecordsToFollower$1.apply(Partition.scala:560)
> at kafka.utils.CoreUtils$.inLock(CoreUtils.scala:250)
> at kafka.utils.CoreUtils$.inReadLock(CoreUtils.scala:256)
> at
> kafka.cluster.Partition.appendRecordsToFollower(Partition.scala:559)
> at
> kafka.server.ReplicaFetcherThread.processPartitionData(ReplicaFetcherThread.scala:112)
> at
> kafka.server.ReplicaFetcherThread.processPartitionData(ReplicaFetcherThread.scala:43)
> at
> kafka.server.AbstractFetcherThread$$anonfun$processFetchRequest$2$$anonfun$apply$mcV$sp$1$$anonfun$apply$2.apply(AbstractFetcherThread.scala:183)
> ... 13 more
> [2018-06-07 21:02:15,669] INFO [ReplicaFetcher replicaId=7, leaderId=9,
> fetcherId=0] Stopped (kafka.server.ReplicaFetcherThread)
> {code}
> In order to fix the issue the topic configuration must be changed back to a
> reasonable value and brokers which had ReplicaFetcher threads die need to be
> restarted one at a time to recover the under-replicated partitions.
> A value like 14 bytes is too small to store a message in the log segment. An
> ls -al of the topic partition directory would look something like:
> {code:java}
> -rw-r--r--. 1 root root 10M Jun 7 21:53 00000000000000002362.index
> -rw-r--r--. 1 root root 0 Jun 7 21:02 00000000000000002362.log
> -rw-r--r--. 1 root root 10M Jun 7 21:53 00000000000000002362.timeindex
> -rw-r--r--. 1 root root 4 Jun 7 21:53 leader-epoch-checkpoint
> {code}
> It would be good to add a check to prevent this configuration to be set to
> such a small value.
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