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https://issues.apache.org/jira/browse/NIFI-3599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16374737#comment-16374737
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Michael Moser commented on NIFI-3599:
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I have an approach to resolve this, but I would like to get [~mcgilman] and/or
[~scottyaslan] to comment, because there are UI/UX implications.
It's fairly easy to move default back pressure Object and Data Size threshold
settings from server-side code (StandardFlowFileQueue.java) to nifi.properties
and make the back end use them. However, the UI also has default back pressure
set in the nf-connection-configuration.js code. The UI does not seem to have
access to nifi.properties in order to read settings from there.
When a new connection is drawn, I propose setting these two back pressure
fields to 'default' in the UI, or leave them empty. If a user doesn't change
them, the JS would send to the server a null value in the JSON for these two
fields. The server would recognize this and use the nifi.properties default
back pressure settings. If a user makes changes to these fields, the JSON sent
to the server would contain those changes.
I tested this approach and it works. I'll be happy to submit a PR. But is
this an acceptable approach? Thanks for feedback.
> Add nifi.properties value to globally set the default backpressure size
> threshold for each connection
> -----------------------------------------------------------------------------------------------------
>
> Key: NIFI-3599
> URL: https://issues.apache.org/jira/browse/NIFI-3599
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Configuration
> Reporter: Jeremy Dyer
> Assignee: Jeremy Dyer
> Priority: Major
>
> By default each new connection added to the workflow canvas will have a
> default backpressure size threshold of 10,000 objects. While the threshold
> can be changed on a connection level it would be convenient to have a global
> mechanism for setting that value to something other than 10,000. This
> enhancement would add a property to nifi.properties that would allow for this
> threshold to be set globally unless otherwise overridden at the connection
> level.
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