How to fix Ambari UI not loading.

[#1]

All services are working fine still Ambari UI not working, Please help to fix this.

[#2]

@Vijay Kumar Yadav

A good starting point is to attach your ambari-server logs and also check your FW settings

Also check if the port is free and listening

$ netstat -an | grep 8080 | grep -i listen

or

curl http://ambari-server-ip:8080

This should give you some idea whether the port is reachable or not

[#3]

Hi @Geoffrey Shelton Okot ,

Thanks for your response and valuable suggestion(A good starting point is to attach your ambari-server logs). i will take care this in future also.

As you suggest, I have checked ambari port 8080 and it's reachable but still Ambari UI not loading.

So please find my ambari-server logs and ambari-server status in attachments and please guide me to resolve this issue.

[#4]

@Vijay Kumar Yadav

Can you describe your current setup? The 2 nodes you are same OS and have you done the OS perparation prior?

HDP/Ambari versions?

Can you paste your ambari/hdp.repo

If using public repo have you enabled internet access?

Memory allocated?

Please revert

[#5 · Accepted solution]

@Vijay Kumar Yadav

Few strange things we noticed in your ambari-serevr.log:

19 Nov 2017 10:43:49,934 ERROR [main] ViewRegistry:1875 - Caught exception migrating data in view ADMIN_VIEW{2.5.1.0}
java.io.FileNotFoundException: /var/lib/ambari-server/resources/views/work/HIVE{1.5.0}/WEB-INF/classes/view.xml (No such file or directory)
    at java.io.FileInputStream.open0(Native Method)

.

Which indicates that your "ADMIN_VIEW" and "HIVE_VIEW (1.5.0) instances are not getting getting extracted properly and because the "ADMIN_VIEW" has some issues so it might be a reason of Ambari

.

So please try this:

# ambari-server stop
# rm -rf  /var/lib/ambari-server/resources/views/work/*
# ambari-server start

.

Basically we are removing the "work" directory contents and then restarting the ambari server again so that the Ambari Views JARs will be extracted freshly when we restart ambari-server next time.

After following the above steps please double check the ambari-server.log to verify that you are not getting any such error as mentioned above in your logs.

.

After completion of successful restart of ambari-server (without those errors) please check if you are able to access the port 8080 from your remote machine (where you are opening the ambari UI browser).

# nc -v namenode.example.com 8080
# nc -v $IP_ADDRESS_OF_AMBARI_HOST 8080
(OR)
# telnet namenode.example.com 8080
# telnet $IP_ADDRESS_OF_AMBARI_HOST 8080

.

If the port is not accessible then please check if the firewall / iptables is disabled on the ambari server host as following:

# service iptables status
# service iptables stop

[#6]

@Jay Kumar SenSharma

Thanks for your answer.

Yes my "ADMIN_VIEW" and "HIVE_VIEW (1.5.0) instances was not getting extracted properly, but after follow your suggestion now it's working fine. So thanks for your support.

[#7]

Stop the firewall, it will work

[#8]

Hi Vijay,

I came across your issue. (Ambari UI not loading.)  I am having similar issue everyday on some certain period. and then after I had to restart ambari-server service and only then users are able to login to Ambari UI. is your problem solved permanently or you need to restart your ambari-server every time UI not working? 

grateful if you advice what else you have done to fix it parmanently.

Thanks