[jira] [Created] (NIFI-9434) Controller level bulletin when content repository backpressure

["Lehel Boér (Jira)" <ji...@apache.org>]

Lehel Boér created NIFI-9434:
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             Summary: Controller level bulletin when content repository backpressure
                 Key: NIFI-9434
                 URL: https://issues.apache.org/jira/browse/NIFI-9434
             Project: Apache NiFi
          Issue Type: Improvement
            Reporter: Lehel Boér


We see more and more users hitting the situation where NiFi seems stuck because of the content repo back pressure mechanism that is set by default. We should have a controller level bulletin to let the users know what is happening.

This usually happens when all repositories and OS data are using the same file system and usage goes over 52%.

If nifi.content.repository.archive.max.usage.percentage is 50% (default value) and nifi.content.repository.archive.backpressure.percentage is not set, the effective value of nifi.content.repository.archive.backpressure.percentage will be 52%.

This property is used to control the content repository disk usage percentage at which backpressure is applied to the processes writing to the content repository. Once this percentage is reached, the content repository will refuse any additional writes. Writes will be refused until the archive delete process has brought the content repository disk usage percentage below nifi.content.repository.archive.max.usage.percentage.



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