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https://issues.apache.org/jira/browse/FLUME-2390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14311919#comment-14311919
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Rotem Hermon commented on FLUME-2390:
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The problem of data getting posted multiple times is that when Flume retries a
batch, all the documents are getting indexed again in Elasticsearch. And since
no specific document ID is provided for the documents, Elasticsearch treats
them as new documents and updates them again.
The correct solution for this specific problem is to generate the document _id
for each indexed document, so that even if it gets indexed again it will
re-index the same document and not create a new one.
We apply such a method in our extended serializer, you can see here -
https://github.com/gigya/flume-ng-elasticsearch-ser-ex#generating-document-ids-for-events
> Flume-ElasticSearch Data gets posted multiple times when one of the event
> fail validation at elastic search sink for JSON Data
> ------------------------------------------------------------------------------------------------------------------------------
>
> Key: FLUME-2390
> URL: https://issues.apache.org/jira/browse/FLUME-2390
> Project: Flume
> Issue Type: Bug
> Components: Sinks+Sources
> Affects Versions: v1.4.0
> Environment: CDH4.5
> Reporter: Deepak Subhramanian
>
> Hi,
> I am using Elastic Search Sink to post JSON data. I used the temporary fix
> mentioned in https://issues.apache.org/jira/browse/FLUME-2126 to get JSON
> data posted to elastic search. When one of the message fail validation at
> ElasticSearch mapping for JSON data ( For example - getting empty message) ,
> Flume seems to post the entire batch again and again until I restart Flume.
> Because of that no of events went from an avg of 100 to avg of 2000 per 10
> minutes. As a temporary fix I set a header in my FlumeHTTP Source for non
> valid JSON and used a interceptor to send data to multiple ESSINKS which has
> different index names.
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