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https://issues.apache.org/jira/browse/NIFI-2850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15652077#comment-15652077
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ASF subversion and git services commented on NIFI-2850:
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Commit c441a8696d8dce47f263846cdf5ecac8506ba5d3 in nifi's branch
refs/heads/master from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=c441a86 ]
NIFI-2850 This closes #1115. Added a migrate() method to ProcessSession and
refactored BinFiles and MergeContent to use it
> Provide ability for a FlowFile to be migrated from one Process Session to
> another
> ---------------------------------------------------------------------------------
>
> Key: NIFI-2850
> URL: https://issues.apache.org/jira/browse/NIFI-2850
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Joseph Witt
> Fix For: 1.1.0
>
>
> Currently, the MergeContent processor creates a separate ProcessSession for
> each FlowFile that it pulls. This is done so that we can ensure that we can
> commit all Process Sessions when a bin is full. Unfortunately, this means
> that MergeContent is required to call ProcessSession.get() many times, which
> adds a lot of contention on the FlowFile Queue. If we allow FlowFiles to be
> migrated from 1 session to another, we can have a session per bin, and then
> use ProcessSession.get(100) to greatly reduce lock contention. This will
> likely have benefits in other processors as well.
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