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https://issues.apache.org/jira/browse/FLUME-2814?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Li Ye updated FLUME-2814:
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Attachment: FLUME-2789-2.patch
> flume kafka sink does not write events to configured sink topic when source
> is also from other topic of kafka
> -------------------------------------------------------------------------------------------------------------
>
> Key: FLUME-2814
> URL: https://issues.apache.org/jira/browse/FLUME-2814
> Project: Flume
> Issue Type: Bug
> Components: Sinks+Sources
> Affects Versions: v1.5.0
> Reporter: Manohar
> Attachments: FLUME-2789-1.patch, FLUME-2789-2.patch
>
>
> I was testing a case when flume agent is reading from kafka source from topic
> 'sourcetopic' and sink configured to kafkasink but to other topic
> 'destinationtopic',
> tier1.sources = source1
> tier1.channels = channel1
> tier1.sinks = sink1
> tier1.sources.source1.type = org.apache.flume.source.kafka.KafkaSource
> tier1.sources.source1.channels = channel1
> tier1.sources.source1.zookeeperConnect = localhost:2181
> tier1.sources.source1.topic = sourcetopic
> tier1.sinks.sink1.type = org.apache.flume.sink.kafka.KafkaSink
> tier1.sinks.sink1.topic = destinationtopic
> tier1.sinks.sink1.brokerList = localhost:9092
> tier1.sinks.sink1.channel = channel1
> tier1.channels.channel1.type = memory
> tier1.channels.channel1.capacity = 10000
> tier1.channels.channel1.transactionCapacity = 1000
> With this settings i noticed that event were not written to
> 'destinationtopic',
> After debugging the agent if found that kafka source puts in topic name in
> header.
> headers.put(KafkaSourceConstants.TOPIC, topic);
> and in sink check is made to see if headers contain topic, if exists then we
> take topic name from header and write event that topic and there by
> discarding configured sink topic i ,e destinationtopic.
> here is code snippet that does, even though variable topic as
> destinationtopic, since header had topic, kafka sink takes topic name from
> header and puts event to that topic i,e again to source topic
> if ((eventTopic = headers.get(TOPIC_HDR)) == null) {
> eventTopic = topic;
> }
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