Mark Payne created NIFI-2850:
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Summary: 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: Mark Payne
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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