[jira] [Commented] (NIFI-1822) Allow concurrent execution of ExecuteScript

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-1822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15262170#comment-15262170 ] 

ASF GitHub Bot commented on NIFI-1822:
--------------------------------------

GitHub user mattyb149 opened a pull request:

    https://github.com/apache/nifi/pull/387

    NIFI-1822: Allow concurrent execution in ExecuteScript

    Added a ScriptEngine pool for use by ExecuteScript, to enable it to run with multiple concurrent tasks.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/mattyb149/nifi NIFI-1822

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/nifi/pull/387.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 #387
    
----
commit 0d3aac1cdb5d6d2ed2779ade8b3b48169ccf6f21
Author: Matt Burgess <ma...@apache.org>
Date:   2016-04-28T13:53:16Z

    NIFI-1822: Allow concurrent execution in ExecuteScript

----


> Allow concurrent execution of ExecuteScript
> -------------------------------------------
>
>                 Key: NIFI-1822
>                 URL: https://issues.apache.org/jira/browse/NIFI-1822
>             Project: Apache NiFi
>          Issue Type: Improvement
>            Reporter: Matt Burgess
>            Assignee: Matt Burgess
>
> Currently ExecuteScript is annotated as TriggerSerially, meaning only one task can be running at a time. This causes issues for throughput, and can become a severe bottleneck in a flow.
> Originally this was done because the bindings for the session, context, etc. were put on a single script engine, so multiple tasks would clobber each other's bindings. However as a tradeoff (memory for capability), it would be better to have a "pool" of Script Engine instances, whose size is perhaps the max number of concurrent tasks.



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