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https://issues.apache.org/jira/browse/NIFI-4169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16162694#comment-16162694
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ASF GitHub Bot commented on NIFI-4169:
--------------------------------------
Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/2105
This PR is now ready to get reviewed.
A flow template is available here for testing both NiFi as a WebSocket
client and server.
https://gist.github.com/ijokarumawak/f36668b193bc413da3e0d968bb6b47c1
This PR is based on the contribution from Y Wikander.
- Added "Fork Failed Broadcast Sessions" property to specify whether
failed FlowFiles should be forked and transferred individually so that
user can construct a error handling flow using each session id.
- Added "Enable Detailed Failure Relationships" property to separate
failure routes into more detailed ones, such as 'no connected sessions'
or 'communication failure'
- Added "websocket.broadcast.succeeded" and "websocket.broadcast.failed"
attributes to outgoing FlowFiles when a message is broadcast.
> 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
> 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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