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Joseph Witt commented on NIFI-6488: ----------------------------------- on the operational state preservation comment one of the things we tend to favor/preserve is the actual running dataflow btw. The UI being unresponsive can reflect this bias. That is just a general statement - we should figure out what you're hitting. Also, where /what environment is this NiFi instance running in? Is it a cluster? > NiFi web interface often non-responsive > ---------------------------------------- > > Key: NIFI-6488 > URL: https://issues.apache.org/jira/browse/NIFI-6488 > Project: Apache NiFi > Issue Type: Bug > Affects Versions: 1.9.2 > Environment: centos 7 > Reporter: David Sargrad > Priority: Major > > I have been using NiFi for close to a year. Currently most of my experience > has been with building custom processors and prototyping a variety of flows. > > Often the NiFi web interface becomes non-responsive. Its typically during a > flow integration phase, where I leave flowfiles sitting in queues, sometimes > 3 or 4 queues may be maxed at 10,000 flow files. These are relatively small > flowfiles (perhaps 200 or 300 bytes). Yet, of course, the sum total of the > filled queues is in the tens of megabytes. > > I am guessing that the JVM is nearing, or perhaps has exceeded, its maximum > allocated heap size. I'd think that NiFi protects against non-responsive UI's > by shedding load, presenting a warning, or doing something to preserve its > operational state. > > What is the best way for me to isolate this issue? I'd like to understand > exactly what drives NiFi to be non-responsive. If there is anything that I > can do to isolate this, and to help the NiFi team make this more robust, I'm > glad to dig. > > Its been impossible for me to exactly characterize the conditions that lead > to a non-responsive NiFi UI. However I see this fairly frequently. > !image-2019-07-25-08-23-46-031.png! -- This message was sent by Atlassian JIRA (v7.6.14#76016)