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From "Sebastian Klemke (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4015) FlinkKafkaProducer08 fails when partition leader changes
Date Mon, 11 Jul 2016 17:27:11 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15371216#comment-15371216
] 

Sebastian Klemke commented on FLINK-4015:
-----------------------------------------

For our use case, buffering the in-flight records and replaying the whole buffer in order
from first failed message would be optimal.

> FlinkKafkaProducer08 fails when partition leader changes
> --------------------------------------------------------
>
>                 Key: FLINK-4015
>                 URL: https://issues.apache.org/jira/browse/FLINK-4015
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>    Affects Versions: 1.0.2
>            Reporter: Sebastian Klemke
>
> When leader for a partition changes, producer fails with the following exception:
> {code}
> 06:34:50,813 INFO  org.apache.flink.yarn.YarnJobManager                          - Status
of job b323f5de3d32504651e861d5ecb27e7c (JOB_NAME) changed to FAILING.
> java.lang.RuntimeException: Could not forward element to next operator
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:354)
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:337)
> 	at org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51)
> 	at OPERATOR.flatMap2(OPERATOR.java:82)
> 	at OPERATOR.flatMap2(OPERATOR.java:16)
> 	at org.apache.flink.streaming.api.operators.co.CoStreamFlatMap.processElement2(CoStreamFlatMap.java:63)
> 	at org.apache.flink.streaming.runtime.io.StreamTwoInputProcessor.processInput(StreamTwoInputProcessor.java:207)
> 	at org.apache.flink.streaming.runtime.tasks.TwoInputStreamTask.run(TwoInputStreamTask.java:89)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:225)
> 	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
> 	at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.RuntimeException: Could not forward element to next operator
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:354)
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:337)
> 	at org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:39)
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:351)
> 	... 10 more
> Caused by: java.lang.RuntimeException: Could not forward element to next operator
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:354)
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:337)
> 	at org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:39)
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:351)
> 	... 13 more
> Caused by: java.lang.Exception: Failed to send data to Kafka: This server is not the
leader for that topic-partition.
> 	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerBase.checkErroneous(FlinkKafkaProducerBase.java:282)
> 	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducerBase.invoke(FlinkKafkaProducerBase.java:249)
> 	at org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:39)
> 	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:351)
> 	... 16 more
> Caused by: org.apache.kafka.common.errors.NotLeaderForPartitionException: This server
is not the leader for that topic-partition.
> {code}



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