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https://issues.apache.org/jira/browse/FLUME-3043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15970532#comment-15970532
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ASF subversion and git services commented on FLUME-3043:
--------------------------------------------------------
Commit c718dae09d10db640cb9eb59f8abb11bd385a799 in flume's branch
refs/heads/trunk from [~lolee_k]
[ https://git-wip-us.apache.org/repos/asf?p=flume.git;h=c718dae ]
FLUME-3043. Fix NPE in Kafka Sink and Channel
When logging level is set to DEBUG, Kafka Sink and Kafka Channel may throw a
NullPointerException.
This patch ensures that `metadata` is not null to avoid the exception.
This closes #125
Reviewers: Denes Arvay, Bessenyei Balázs Donát
(loleek via Bessenyei Balázs Donát)
> KafkaSink SinkCallback throws NullPointerException when Log4J level is debug
> ----------------------------------------------------------------------------
>
> Key: FLUME-3043
> URL: https://issues.apache.org/jira/browse/FLUME-3043
> Project: Flume
> Issue Type: Bug
> Components: Sinks+Sources
> Affects Versions: 1.7.0
> Reporter: dengkai
> Assignee: dengkai
> Attachments: FLUME-3043.patch
>
>
> When we send a event with SinkCallback to kafka under DEBUG level of log4j,
> if kafka reponses a result with exception but not a RecordMetadata. Kafka
> Sink will throw NPE.
> code in SinkCallback:
> {code}
> if (logger.isDebugEnabled()) {
> long eventElapsedTime = System.currentTimeMillis() - startTime;
> logger.debug("Acked message partition:{} ofset:{}", metadata.partition(),
> metadata.offset());
> logger.debug("Elapsed time for send: {}", eventElapsedTime);
> }
> {code}
> code in Kafka Producer:
> {code}
> if (exception == null) {
> RecordMetadata metadata = new RecordMetadata(...);
> thunk.callback.onCompletion(metadata, null);
> } else {
> thunk.callback.onCompletion(null, exception);
> }
> {code}
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