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https://issues.apache.org/jira/browse/NIFI-4326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16149392#comment-16149392
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ASF GitHub Bot commented on NIFI-4326:
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Github user kevdoran commented on the issue:
https://github.com/apache/nifi/pull/2111
Whoops, didn't see this (or the corresponding JIRA) until after I opened a
ticket and PR for the same issue
([NIFI-4339](https://issues.apache.org/jira/browse/NIFI-4339), [PR
2118](https://github.com/apache/nifi/pull/2118)) after it showed up on
[StackOverflow](https://stackoverflow.com/questions/45927852/nifi-email-consumeimap-filter-by-subject-from-to-and-date/45928680#comment78898203_45928680).
Looks like I accidentally duplicated your effort @btwood, my apologies. I was
able to come up with a test case for the issue, see my branch if interested.
> ExtractEmailHeaders.java unhandled Exceptions
> ---------------------------------------------
>
> Key: NIFI-4326
> URL: https://issues.apache.org/jira/browse/NIFI-4326
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.3.0
> Environment: jdk 1.8.0_121-b13
> Reporter: Benjamin Wood
> Priority: Minor
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> The ExtractEmailHeaders processor throws a NullPointerException if there is
> no TO, CC, and BCC recipients.
> If there are no recipients "originalMessage.getAllRecipients()" returns NULL,
> and not a 0 length array.
> If an address is empty (<> or " ") then getRecipients() will throw an "Empty
> Address" AddressException
> It's possible this is only an issue with Oracle Java.
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