[
https://issues.apache.org/jira/browse/KAFKA-12345?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Alok Nikhil updated KAFKA-12345:
--------------------------------
Description:
Occasionally, a scheduler thread on a broker crashes with this stack
```
[2021-02-19 01:04:24,683] ERROR Uncaught exception in scheduled task
'send-alter-isr' (kafka.utils.KafkaScheduler)
java.lang.NullPointerException
at kafka.server.AlterIsrManagerImpl.sendRequest(AlterIsrManager.scala:117)
at
kafka.server.AlterIsrManagerImpl.propagateIsrChanges(AlterIsrManager.scala:85)
at kafka.server.AlterIsrManagerImpl.$anonfun$start$1(AlterIsrManager.scala:66)
at kafka.utils.KafkaScheduler.$anonfun$schedule$2(KafkaScheduler.scala:114)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
```
After that the broker is unable to fetch any records from any other broker
(and vice versa)
```
[2021-02-19 01:05:07,000] INFO [ReplicaFetcher replicaId=0, leaderId=4,
fetcherId=0] Error sending fetch request (sessionId=164432409
2, epoch=957) to node 4: (org.apache.kafka.clients.FetchSessionHandler)
java.io.IOException: Connection to 4 was disconnected before the response was
read
at
org.apache.kafka.clients.NetworkClientUtils.sendAndReceive(NetworkClientUtils.java:100)
at
kafka.server.ReplicaFetcherBlockingSend.sendRequest(ReplicaFetcherBlockingSend.scala:110)
at
kafka.server.ReplicaFetcherThread.fetchFromLeader(ReplicaFetcherThread.scala:215)
at
kafka.server.AbstractFetcherThread.processFetchRequest(AbstractFetcherThread.scala:313)
at
kafka.server.AbstractFetcherThread.$anonfun$maybeFetch$3(AbstractFetcherThread.scala:139)
at
kafka.server.AbstractFetcherThread.maybeFetch(AbstractFetcherThread.scala:138)
at kafka.server.AbstractFetcherThread.doWork(AbstractFetcherThread.scala:121)
at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:96)
```
was:
Occasionally, a scheduler thread on a broker crashes with this stack
[2021-02-19 01:04:24,683] ERROR Uncaught exception in scheduled task
'send-alter-isr' (kafka.utils.KafkaScheduler)
java.lang.NullPointerException
at
kafka.server.AlterIsrManagerImpl.sendRequest(AlterIsrManager.scala:117)
at
kafka.server.AlterIsrManagerImpl.propagateIsrChanges(AlterIsrManager.scala:85)
at
kafka.server.AlterIsrManagerImpl.$anonfun$start$1(AlterIsrManager.scala:66)
at
kafka.utils.KafkaScheduler.$anonfun$schedule$2(KafkaScheduler.scala:114)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at
java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
After that the broker is unable to fetch any records from any other broker (and
vice versa)
[2021-02-19 01:05:07,000] INFO [ReplicaFetcher replicaId=0, leaderId=4,
fetcherId=0] Error sending fetch request (sessionId=164432409
2, epoch=957) to node 4: (org.apache.kafka.clients.FetchSessionHandler)
java.io.IOException: Connection to 4 was disconnected before the response was
read
at
org.apache.kafka.clients.NetworkClientUtils.sendAndReceive(NetworkClientUtils.java:100)
at
kafka.server.ReplicaFetcherBlockingSend.sendRequest(ReplicaFetcherBlockingSend.scala:110)
at
kafka.server.ReplicaFetcherThread.fetchFromLeader(ReplicaFetcherThread.scala:215)
at
kafka.server.AbstractFetcherThread.processFetchRequest(AbstractFetcherThread.scala:313)
at
kafka.server.AbstractFetcherThread.$anonfun$maybeFetch$3(AbstractFetcherThread.scala:139)
at
kafka.server.AbstractFetcherThread.maybeFetch(AbstractFetcherThread.scala:138)
at
kafka.server.AbstractFetcherThread.doWork(AbstractFetcherThread.scala:121)
at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:96)
> KIP-500: AlterIsrManager crashes on broker idle-state
> -----------------------------------------------------
>
> Key: KAFKA-12345
> URL: https://issues.apache.org/jira/browse/KAFKA-12345
> Project: Kafka
> Issue Type: Task
> Components: core
> Reporter: Alok Nikhil
> Priority: Major
> Labels: kip-500
>
> Occasionally, a scheduler thread on a broker crashes with this stack
> ```
> [2021-02-19 01:04:24,683] ERROR Uncaught exception in scheduled task
> 'send-alter-isr' (kafka.utils.KafkaScheduler)
> java.lang.NullPointerException
> at kafka.server.AlterIsrManagerImpl.sendRequest(AlterIsrManager.scala:117)
> at
> kafka.server.AlterIsrManagerImpl.propagateIsrChanges(AlterIsrManager.scala:85)
> at
> kafka.server.AlterIsrManagerImpl.$anonfun$start$1(AlterIsrManager.scala:66)
> at kafka.utils.KafkaScheduler.$anonfun$schedule$2(KafkaScheduler.scala:114)
> at
> java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
> at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
> at
> java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> at java.base/java.lang.Thread.run(Thread.java:834)
> ```
> After that the broker is unable to fetch any records from any other broker
> (and vice versa)
> ```
> [2021-02-19 01:05:07,000] INFO [ReplicaFetcher replicaId=0, leaderId=4,
> fetcherId=0] Error sending fetch request (sessionId=164432409
> 2, epoch=957) to node 4: (org.apache.kafka.clients.FetchSessionHandler)
> java.io.IOException: Connection to 4 was disconnected before the response
> was read
> at
> org.apache.kafka.clients.NetworkClientUtils.sendAndReceive(NetworkClientUtils.java:100)
> at
> kafka.server.ReplicaFetcherBlockingSend.sendRequest(ReplicaFetcherBlockingSend.scala:110)
> at
> kafka.server.ReplicaFetcherThread.fetchFromLeader(ReplicaFetcherThread.scala:215)
> at
> kafka.server.AbstractFetcherThread.processFetchRequest(AbstractFetcherThread.scala:313)
> at
> kafka.server.AbstractFetcherThread.$anonfun$maybeFetch$3(AbstractFetcherThread.scala:139)
> at
> kafka.server.AbstractFetcherThread.maybeFetch(AbstractFetcherThread.scala:138)
> at kafka.server.AbstractFetcherThread.doWork(AbstractFetcherThread.scala:121)
> at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:96)
> ```
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