question Re: Where are nifi alerts and warning logs and how can I view them? in Archives of Support Questions (Read Only)

Where are nifi alerts and warning logs and how can I view them?

gunnar_anderson — Fri, 16 Sep 2022 12:50:00 GMT

I am testing and tuning some data flows. During off hours a processor might fail or files might be lost.

Where are the error logs stored? And where would I find information to correlate an alert or error log to a solution, such as: (see below) ???

Error "Failed to process session due to org.apache.nifi.processor.exception.ProcessException:FlowFile Repository failed to update: FlowFile Repository failed to update"

Warning "Rejecting connection from /x.x.x.x:2000 because max connections has been met"

Error "Successfully sent 2 messages, but failed to send 1 messages; the last error received was java.io.IOException: Message too long: Message too long

Warning "Response time from ip-x-x-x-x... :2000 was slow for each of the last 3 requests made. To see more...

OOM errors

Thank you

Re: Where are nifi alerts and warning logs and how can I view them?

sandyy006 — Wed, 07 Feb 2018 08:30:20 GMT

@Gunnar Anderson

The logs should be at /var/log/nifi/nifi-app.log in all the nifi nodes. You can also use Log Search (if it is installed in your environment) to see the pattern and play with the log using UI.

Re: Where are nifi alerts and warning logs and how can I view them?

gunnar_anderson — Wed, 07 Feb 2018 22:38:43 GMT

@Sandeep Nemuri Thank you for the help!

Re: Where are nifi alerts and warning logs and how can I view them?

gunnar_anderson — Wed, 07 Feb 2018 22:47:34 GMT

If you could, please send a link to the "Log Search" utility that you use. Thank you

Re: Where are nifi alerts and warning logs and how can I view them?

sandyy006 — Thu, 08 Feb 2018 03:32:11 GMT

Log Search can be installed via Ambari : https://docs.hortonworks.com/HDPDocuments/Ambari-2.6.0.0/bk_ambari-operations/content/log_search_ui.html

Re: Where are nifi alerts and warning logs and how can I view them?

gunnar_anderson — Fri, 09 Feb 2018 02:32:34 GMT

Thank you!