If you use Elasticsearch <= 1.5, there is Logstash JIRA River Plugin .
For> 1.5, there is nothing to read from the JIRA REST API, so pulling data from JIRA into Elasticsearch would have to rely on something like the Logstash JDBC input plugin . If you are familiar with JIRA's internal structures, this can definitely work for you - if not, then there will be dragons, because JIRA does some pretty complicated (some of them call it scary) things with an RDMS data store. This applies in particular to JIRA user fields.
I know that you did not ask about this, but in the interest of completeness, writing to JIRA (creating problems) is supported in quite a lot of all versions of Elasticsearch.
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