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https://issues.apache.org/jira/browse/FLINK-3368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15143135#comment-15143135
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ASF GitHub Bot commented on FLINK-3368:
---------------------------------------
GitHub user rmetzger opened a pull request:
https://github.com/apache/flink/pull/1623
[FLINK-3368][Kafka 0.8] Handle leader changes in Kafka Consumer.
Please see the JIRA for an explanation of the problems.
tl;dr: The Kafka 0.8 consumer now handles broker failures internally,
without relying on Flink's checkpointing / job recovery.
The test case which was previously relying on a topology restart is now
expecting the consumers to handle the failure.
I also tested this change on a 7 nodes cluster. The job was running for 30
minutes, surviving 4 broker shutdowns.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rmetzger/flink flink3368
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/1623.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1623
----
commit 5e3bc92a0e6b1250a8ae0f8d898296586851dea1
Author: Robert Metzger <rmetz...@apache.org>
Date: 2016-02-09T11:04:45Z
[FLINK-3368][Kafka 0.8] Handle leader changes in Kafka Consumer.
----
> Kafka 0.8 consumer fails to recover from broker shutdowns
> ---------------------------------------------------------
>
> Key: FLINK-3368
> URL: https://issues.apache.org/jira/browse/FLINK-3368
> Project: Flink
> Issue Type: Bug
> Components: Kafka Connector
> Affects Versions: 1.0.0
> Reporter: Robert Metzger
> Assignee: Robert Metzger
> Priority: Blocker
>
> It seems that the Kafka Consumer (0.8) fails to restart a job after it failed
> due to a Kafka broker shutdown.
> {code}
> java.lang.Exception: Unable to get last offset for partitions [FetchPartition
> {topic=a, partition=13, offset=-915623761776}, FetchPartition {topic=b,
> partition=13, offset=-915623761776}, FetchPartition {topic=c, partition=13,
> offset=-915623761776}, FetchPartition {topic=d, partition=13,
> offset=-915623761776}, FetchPartition {topic=e, partition=13,
> offset=-915623761776}, FetchPartition {topic=f, partition=13,
> offset=-915623761776}, FetchPartition {topic=g, partition=13,
> offset=-915623761776}].
> Exception for partition 13: kafka.common.NotLeaderForPartitionException
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
> at java.lang.Class.newInstance(Class.java:442)
> at kafka.common.ErrorMapping$.exceptionFor(ErrorMapping.scala:86)
> at kafka.common.ErrorMapping.exceptionFor(ErrorMapping.scala)
> at
> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher$SimpleConsumerThread.getLastOffset(LegacyFetcher.java:551)
> at
> org.apache.flink.streaming.connectors.kafka.internals.LegacyFetcher$SimpleConsumerThread.run(LegacyFetcher.java:379)
> {code}
> I haven't understood the cause of this issue, but I'll investigate it.
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