[
https://issues.apache.org/jira/browse/METRON-1829?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16652218#comment-16652218
]
ASF GitHub Bot commented on METRON-1829:
----------------------------------------
GitHub user merrimanr opened a pull request:
https://github.com/apache/metron/pull/1239
METRON-1829: Large Error Message Causes Slow Search Performance
## Contributor Comments
When a failure happens in the BulkWriterComponent, all pending messages in
a batch are combined into a single error message. This results in a single
large objects being written to ES and causes performance problems. This PR
attempts to solve this issue by instead creating separate error messages for
each message in the batch.
### Testing
This has been tested and verified in full dev:
1. Spin up full dev and verify data is being indexed into ES
2. Stop HDFS in Ambari. This will cause a failure in the
BulkWriterComponent. By default the batch size for OOTB sensors is set to 5.
3. After HDFS has stopped, verify that documents are being written to an ES
error index
4. Retrieve a single document from the ES error index. There should only
be a single `raw_message` field. Subsequent documents in ES should also only
contain a single `raw_message` field. Before there would have been 5
`raw_message_*` fields in a single document.
5. Verify error documents are displayed properly in Kibana.
## Pull Request Checklist
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#### Note:
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It is also recommended that [travis-ci](https://travis-ci.org) is set up
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You can merge this pull request into a Git repository by running:
$ git pull https://github.com/merrimanr/incubator-metron METRON-1829
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/metron/pull/1239.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 #1239
----
commit d674d9afbf7f5a230737dbcfe4ab10a70106f4ed
Author: merrimanr <merrimanr@...>
Date: 2018-10-15T20:46:31Z
initial commit
----
> Large Error Message Causes Slow Search Performance
> --------------------------------------------------
>
> Key: METRON-1829
> URL: https://issues.apache.org/jira/browse/METRON-1829
> Project: Metron
> Issue Type: Bug
> Reporter: Ryan Merriman
> Priority: Major
>
> Errors that occur during batch writes in the index topologies (batch and RA)
> are written to Elasticsearch as a single, large error message, with a field
> for each failed message. For example, if the batch size is 5000, a single
> error message will be created with 5000 fields `raw_message_0`,
> `raw_message_1`, .., `raw_message_4999`. With such large messages, searching
> the error index in Elasticsearch is excessively slow.
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