[jira] [Created] (NIFI-6488) NiFi web interface often non-responsive

["David Sargrad (JIRA)" <ji...@apache.org>]

David Sargrad created NIFI-6488:
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             Summary: 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


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!



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