NIFI Installation: keep getting "Apache NiFi is not running"

[#1]

Hello all,

I downloaded NIFI on a linux ec2 node. I set the JAVA_HOME and am trying to run as su. I am running the command ./nifi.sh run. I do not see any error messages on nifi-app.log or nifi-bootstrap.log but when I check status I keep getting "Apacha Nifi not running". Am I missing some basic check here? One more issue: nifi-user.log file stays at 0 KB (doesn't get updated).

Thanks

[#2]

@Ranjit S can you confirm nothing else is running on port 8080. This is port used by nifi for web-ui. You can look into logs/nifi-bootstrap.log and logs/nifi-app.log and see if there are any errors.

[#3]

if you have some other process running on port 8080, you can change nifi to use a different port by changing the value in conf/nifi.properties. replace 8080 with whatever port you want.

[#4]

@Karthik Narayanan

I am not sure if my previous reply got posted. I think it got lost. My 8080 is not in use. I ran netstat -pan and did not get any reference of 8080 in my output. I also tried changing port to 9090 but no luck. The log files don't contain any error either. The file: nifi-user.log stays at 0KB though. Any other suggestions?

Thanks for your help!

[#5]

@Ranjit S what about nifi-bootstrap.log and nifi-app.log can you check that. Also, it could be possible you may getting stuck in the java entropy issue. In your conf/bootstrap.conf file add the following line .

java.arg.15=-Djava.security.egd=file:/dev/./urandom

Try starting nifi now.

[#6]

@Karthik Narayanan nifi-bootstrap.log and nifi.app.log do not show any error. I added the java.arg.15 line but I still get the same issue.

[#7]

@Ranjit S I would recommend using ./nifi.sh start, rather than ./nifi.sh run and see if that works out for you. You can then stop it by running "nifi.sh stop".

[#8]

@mpayne I tried running nifi using ./nifi.sh start and after few minutes tries ./nifi.sh status and I still get the same result that nifi is not running.

[#9]

@Ranjit S That is strange.... can you show us your directory structure, a screenshot of it. Also make sure you downloaded the full tar and that it was not corrupted. I should see something in nifi-bootstrap.log at least.

[#10]

I agree - that would be useful. Any chance that there are permissions issues at play here? The user running NiFi will need write permissions to the $NIFI_HOME directory and all subdirectories.