Nifi UI not launching

[#1]

Hello

I have downloaded HDF in a centos 7 machine and i have started the service. When i run bin/nifi.sh status, i get the following

Nifi is currently running, listening to Bootstrap on port 40883, PID=18516

However when i enter http://<servername>:8080/nifi the UI fails to appear. Is there anything i am missing? Please advise

Regards

Ahmad

[#2]

can you check nifi bootstrap logs to see if there is any port conflict.

[#3]

Please find below the bootstrap log

2016-05-31 09:40:05,021 INFO [main] o.a.n.b.NotificationServiceManager Successfully loaded the following 0 services: []
2016-05-31 09:40:05,027 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STARTED
2016-05-31 09:40:05,027 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STOPPED
2016-05-31 09:40:05,027 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_DIED
2016-05-31 09:40:05,035 INFO [main] org.apache.nifi.bootstrap.Command Starting Apache NiFi...
2016-05-31 09:40:05,035 INFO [main] org.apache.nifi.bootstrap.Command Working Directory: /opt/HDF-1.2.0.1-1/nifi
2016-05-31 09:40:05,036 INFO [main] org.apache.nifi.bootstrap.Command Command: /opt/jdk1.7.0_79/bin/java -classpath /opt/HDF-1.2.0.1-1/nifi/./conf:/opt/HDF-1.2.0.1-1/nifi/./lib/jcl-over-slf4j-1.7.12.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/jul-to-slf4j-1.7.12.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/log4j-over-slf4j-1.7.12.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/logback-classic-1.1.3.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/logback-core-1.1.3.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/nifi-api-0.6.0.1.2.0.1-1.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/nifi-documentation-0.6.0.1.2.0.1-1.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/nifi-nar-utils-0.6.0.1.2.0.1-1.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/nifi-properties-0.6.0.1.2.0.1-1.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/nifi-runtime-0.6.0.1.2.0.1-1.jar:/opt/HDF-1.2.0.1-1/nifi/./lib/slf4j-api-1.7.12.jar -Djava.net.preferIPv4Stack=true -Dsun.net.http.allowRestrictedHeaders=true -Djava.protocol.handler.pkgs=sun.net.www.protocol -Dorg.apache.jasper.compiler.disablejsr199=true -Xmx512m -Djava.awt.headless=true -Xms512m -Dnifi.properties.file.path=/opt/HDF-1.2.0.1-1/nifi/./conf/nifi.properties -Dnifi.bootstrap.listen.port=44940 -Dapp=NiFi org.apache.nifi.NiFi
2016-05-31 09:40:05,532 INFO [NiFi Bootstrap Command Listener] org.apache.nifi.bootstrap.RunNiFi Apache NiFi now running and listening for Bootstrap requests on port 40883
2016-05-31 09:44:07,595 INFO [main] o.a.n.b.NotificationServiceManager Successfully loaded the following 0 services: []
2016-05-31 09:44:07,599 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STARTED
2016-05-31 09:44:07,599 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STOPPED
2016-05-31 09:44:07,599 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_DIED
2016-05-31 09:44:07,608 INFO [main] org.apache.nifi.bootstrap.Command Apache NiFi is currently running, listening to Bootstrap on port 40883, PID=18516
2016-05-31 10:14:10,626 INFO [main] o.a.n.b.NotificationServiceManager Successfully loaded the following 0 services: []
2016-05-31 10:14:10,633 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STARTED
2016-05-31 10:14:10,633 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_STOPPED
2016-05-31 10:14:10,633 INFO [main] org.apache.nifi.bootstrap.RunNiFi Registered no Notification Services for Notification Type NIFI_DIED
2016-05-31 10:14:10,651 INFO [main] org.apache.nifi.bootstrap.Command Apache NiFi is currently running, listening to Bootstrap on port 40883, PID=18516

[#4]

Actually, I just have installed nifi locally (vmware) and have the same issue and came across this 😉

[#5]

Is the centos 7 system a VM? If so, is the port 8080 open?

Also, look in the nifi-app.log, it will list the URLs of the NiFi UI.

[#6]

i disabled firewall and it worked

[#7 · Accepted solution]

@Ahmad Debbas

As always, start by checking your most recent /logs for ERROR or even WARN, e.g.:

cat nifi-app* | grep ERROR

Logs are: nifi-app*.log, nifi-bootstrap*.log, nifi-user*.log

[#8]

i disabled firewall and it worked! thanks

[#9]

Ahmad,

The line you are seeing in the nifi-bootstrap.log indicates the JVM started successfully. You need to check the nifi-app.log to make sure the application loaded successfully. In the nifi-app.log you will find the following lines if the application successfully loaded: 2016-05-31 10:46:44,347 INFO [main] org.apache.nifi.web.server.JettyServer NiFi has started. The UI is available at the following URLs:

2016-05-31 10:46:44,347 INFO [main] org.apache.nifi.web.server.JettyServer http://<someaddress or FQDN>:8088/nifi

Verify that the hostname or IP displayed on this line is reachable/resolvable on the system you are running your web browser from.

Thanks,

Matt

[#10]

I am facing the sam issue. I see this in the log. Not sure what it mean and how to fix? Still not able to launch nifi UI

2016-06-23 09:54:53,778 WARN [main] o.e.j.util.component.AbstractLifeCycle FAILED ServerConnector@c53209{HTTP/1.1}{0.0.0.0:8080}: java.net.BindException: Address already in use: bind java.net.BindException: Address already in use: bind