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https://issues.apache.org/jira/browse/NIFI-4169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16162697#comment-16162697
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Koji Kawamura commented on NIFI-4169:
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Hi [~ywik], sorry for taking long to git it back to you.
I've finished reviewing your patch, and based on that I refactored flags and
variables and also added couple of processor properties and FlowFile attributes
to be written.
The pull request is now ready for review.
Would you be able to try it to see if it covers your use-cases?
https://github.com/apache/nifi/pull/2105
Thanks again for submitting this JIRA and sending patches, your contribution is
greatly appreciated!
> PutWebSocket processor with blank WebSocket session id attribute cannot
> transfer to failure queue
> -------------------------------------------------------------------------------------------------
>
> Key: NIFI-4169
> URL: https://issues.apache.org/jira/browse/NIFI-4169
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Extensions
> Affects Versions: 1.3.0
> Reporter: Y Wikander
> Assignee: Koji Kawamura
> Labels: patch
> Attachments:
> 0001-websocket-when-sendMessage-fails-under-blank-session.patch,
> 0002-websocket-PutWebSocket-enhance-broadcast-support.patch
>
>
> If a PutWebSocket processor is setup with a blank WebSocket session id
> attribute (see NIFI-3318; Send message from PutWebSocket to all connected
> clients) and it is not connected to a websocket server it will log the
> failure and mark the flowfile with Success (rather than Failure) -- and the
> data is effectively lost.
> If there are multiple connected clients, and some succeed and others fail,
> routing Failure back into the PutWebSocket could result in duplicate data to
> some clients.
> Other NiFi processors seem to err on the side of "at least once".
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