[jira] [Commented] (NIFI-5995) Update ScriptedLookupService documentation about Jython issues

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-5995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758561#comment-16758561 ] 

ASF subversion and git services commented on NIFI-5995:
-------------------------------------------------------

Commit fef41b302216934886817fd9335ea4b5d62c4c1e in nifi's branch refs/heads/master from Mike Thomsen
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=fef41b3 ]

NIFI-5995 Updated ScriptedLookupService documentation to warn about Jython and removed Jython from the list of supported script engines for it because it's broken now.

Signed-off-by: Matthew Burgess <ma...@apache.org>

This closes #3287


> Update ScriptedLookupService documentation about Jython issues
> --------------------------------------------------------------
>
>                 Key: NIFI-5995
>                 URL: https://issues.apache.org/jira/browse/NIFI-5995
>             Project: Apache NiFi
>          Issue Type: Task
>            Reporter: Mike Thomsen
>            Assignee: Mike Thomsen
>            Priority: Major
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> From nifi-user:
> {quote}Short answer: Unfortunately this is not currently possible for Jython
>  in NiFi 1.7.0+ because of a Jython bug [1] that never made it into a
>  release.
>  
>  Longer answer: NIFI-5287 [2], released as part of NiFi 1.7.0,
>  introduced a new default interface method for LookupService, in order
>  to avoid breaking API compatibility for those with custom
>  LookupServices. This exposes the bug in [1] for the Jython script
>  engine. At a major release point (NiFi 2.0) we could refactor the NiFi
>  codebase to remove the default interface method, update all internal
>  implementations, and announce that the LookupService API has changed
>  and thus custom implementations would have to be updated. Not sure if
>  we can get away with that for minor releases or not, usually breaking
>  API compatibility is a no-no except for major releases.
> {quote}
> [1] [https://bugs.jython.org/issue2403]
>  



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