Github user bbende commented on the issue:
https://github.com/apache/nifi/pull/1361
Looks good, was able to use EL for all three processors modified.
While testing this I noticed that PutUDP does not report a SEND event for
provenance. It would likely be a small fix to make PutUDP do this in onTrigger:
```
StopWatch stopWatch = new StopWatch(true);
sender.send(content.toByteArray());
session.getProvenanceReporter().send(flowFile, transitUri,
stopWatch.getElapsed(TimeUnit.MILLISECONDS));
```
Do you want to add that to this PR, or we can create another JIRA since
technically it is an existing problem?
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