question Re: How to resolve NiFi Web Access issue? in Archives of Support Questions (Read Only)

How to resolve NiFi Web Access issue?

Former Member — Tue, 30 Aug 2016 06:00:16 GMT

we installed nifi successfully through ambari by using below link

https://github.com/abajwa-hw/ambari-nifi-service

when we are using continuously for 10 minutes automatically the nifi server is down, we are unable to open in nifi web UI although it's showing healthy in ambari.

attached all the log files below, please let me know if i have to make any changes in that.nifi-app-2016-08-29-060.txt nifi-bootstrap.txt nifi-user.txt

Re: How to resolve NiFi Web Access issue?

mqureshi — Tue, 30 Aug 2016 06:15:06 GMT

@kishore sanchina

can you please share the output of your nifi-app.log file? It should be under logs folder in your nifi installation.

Re: How to resolve NiFi Web Access issue?

Former Member — Tue, 30 Aug 2016 06:23:21 GMT

@mqureshi im attaching log files nifi-user.txt nifi-app-2016-08-29-060.txt nifi-bootstrap.txt

please explain how to resolve this issue?

Re: How to resolve NiFi Web Access issue?

Former Member — Tue, 30 Aug 2016 06:26:46 GMT

@mqureshi i renamed the .log file to .txt file

Re: How to resolve NiFi Web Access issue?

mqureshi — Tue, 30 Aug 2016 06:33:44 GMT

@kishore sanchina

Looking at your logs, you are running out of PermGen space. you need to increase PermGen and likely your java heap also. How much memory do you have?

2016-08-29 06:58:42,186 ERROR [NiFi Web Server-96] org.apache.nifi.NiFi An Unknown Error Occurred in Thread Thread[NiFi Web Server-96,5,main]: java.lang.OutOfMemoryError: PermGen space

You need to increase the following in your conf/bootstrap.conf folder. I would double it for now to start with.

#java.arg.11=-XX:PermSize=128M

#java.arg.12=-XX:MaxPermSize=128M

And then possibly update following also.

# JVM memory settings

java.arg.2=-Xms1024m

java.arg.3=-Xmx1024m

It would be very difficult for me or anyone else to optimize these for your specific load. You need to figure out based on your load how much memory you need to assign to permgen as well as java heap. this may be trial and error.

Re: How to resolve NiFi Web Access issue?

Former Member — Tue, 30 Aug 2016 06:42:35 GMT

thanks a lot @mqureshi