GitHub user JonZeolla opened a pull request:
https://github.com/apache/incubator-metron/pull/358
METRON-517: Update elasticsearch bro templates for uri
## Problem
[METRON-517](https://issues.apache.org/jira/browse/METRON-517)
The bro uri field in
[HTTP::Info](https://www.bro.org/sphinx/scripts/base/protocols/http/main.bro.html#type-HTTP::Info)
can grow to a size which fails to insert the message into Elasticsearch. The
related error message is:
`IllegalArgumentException[Document contains at least one immense term in
field=\"uri\" (whose UTF8 encoding is longer than the max length 32766), all of
which were skipped...`
## Short-term Solution
Set the elasticsearch template to [truncate the URI
field](https://www.elastic.co/guide/en/elasticsearch/reference/current/ignore-above.html)
at 10922 (32776 / 3), as [RFC 3986](https://tools.ietf.org/html/rfc3986)
allows UTF-8 characters to be used in URIs. 32766 is a size limitation built
into Lucene
([MAX_TERM_LENGTH](https://lucene.apache.org/core/6_2_1/core/constant-values.html#org.apache.lucene.index.IndexWriter.MAX_TERM_LENGTH)),
and each UTF-8 character can be at most 4 bytes, but are predominantly [3
bytes](https://en.wikipedia.org/wiki/CJK_characters).
## Long-term Solution
Currently being tracked via
[METRON-542](https://issues.apache.org/jira/browse/METRON-542)
## Testing
Inserted this into my bare metal cluster via `curl --data
"@/root/incubator-metron/metron-deployment/roles/metron_elasticsearch_templates/files/es_templates/bro_index.template"
-XPUT server5:9200/_template/bro_index`
Did some kibana queries and cluster monitoring on my bare metal cluster.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/JonZeolla/incubator-metron METRON-517
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-metron/pull/358.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 #358
----
commit b63040f0fa3b735fc9636a5eb98b966f164fe1f3
Author: Jon Zeolla <zeo...@gmail.com>
Date: 2016-11-13T03:22:07Z
Restrict Bro HTTP URI field to 10922 characters so it will not surpass
32766 bytes (Assumes a UTF-8 maxb 3 bytes per character)
----
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