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https://issues.apache.org/jira/browse/NIFI-3763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Burgess updated NIFI-3763:
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Resolution: Fixed
Status: Resolved (was: Patch Available)
> Add new processor to log user defined messages built with NiFi Expression
> Language
> ----------------------------------------------------------------------------------
>
> Key: NIFI-3763
> URL: https://issues.apache.org/jira/browse/NIFI-3763
> Project: Apache NiFi
> Issue Type: New Feature
> Components: Core Framework
> Reporter: Peter Horvath
> Priority: Minor
> Fix For: 1.3.0
>
>
> Sometimes it would be very useful to have a NiFi processor, which can simply
> log messages as defined by the DataFlow Manager (DFM/operator).
> Such functionality would be a powerful aid for _debugging_ running NiFi
> dataflows. The DFM should be able to specify the single line log message
> using NiFi Expression Language. Similarly to the existing LogAttribute
> processor, the DataFlow Manager should be able to specify the log level
> (trace, debug, info, warn, error) at which the log line is written.
> While the functionality can be achieved by combining UpdateAttribute and
> LogAttribute processor nodes, having to use three separate nodes (adding the
> log message as an attribute, logging the attribute, then removing the
> attribute from the flowfile's processing context) and a temporary attribute
> to convey the message is overly complex and clutters the flow diagram.
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