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https://issues.apache.org/jira/browse/NIFI-4060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16084672#comment-16084672
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ASF subversion and git services commented on NIFI-4060:
-------------------------------------------------------

Commit b603cb955dcd1d3d9b5e374e5760f2f9b047bda9 in nifi's branch 
refs/heads/master from [~markap14]
[ https://git-wip-us.apache.org/repos/asf?p=nifi.git;h=b603cb9 ]

NIFI-4060: Initial implementation of MergeRecord

NIFI-4060: Addressed threading issue with RecordBin being updated after it is 
completed; fixed issue that caused mime.type attribute not to be written 
properly if all incoming flowfiles already have a different value for that 
attribute

NIFI-4060: Bug fixes; improved documentation; added a lot of debug information; 
updated StandardProcessSession to produce more accurate logs in case of a 
session being committed/rolled back with open input/output streams
Signed-off-by: Matt Burgess <mattyb...@apache.org>

This closes #1958


> Create a MergeRecord Processor
> ------------------------------
>
>                 Key: NIFI-4060
>                 URL: https://issues.apache.org/jira/browse/NIFI-4060
>             Project: Apache NiFi
>          Issue Type: New Feature
>          Components: Extensions
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>             Fix For: 1.4.0
>
>
> When record-oriented data is received one record or a time or needs to be 
> split into small chunks for one reason or another, it will be helpful to be 
> able to combine those records into a single FlowFile that is made up of many 
> records for efficiency purposes, or to deliver to downstream systems as 
> larger batches. This processor should function similarly to MergeContent but 
> make use of Record Readers and Record Writer so that users don't have to deal 
> with headers, footers, demarcators, etc.
> The Processor will also need to ensure that records only get merge into the 
> same FlowFile if they have compatible schemas.



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