I am getting 502 Bad Gateway while loading the localhost:8080 ambari UI. Please suggest what could be the issue ?

[#1]

@Jay Kumar SenSharma

[#2 · Accepted solution]

@Divya Thaore 502 Bad Gateway error is usually indicating a networking error, Try restart of the browser or try accessing from Incognito mode

[#3]

@scharan : tried incognito too. not working.. i dont think it's browser issue

[#4]

Hi, even I am facing the same trouble when trying to load Ambari web page, it shows 502 error.

It was working fine 2 days back but the error is showing from today when I tried to login in the morning.

I have tried all the replies stated above, none worked. I will be grateful if someone can resolve this issue at the earliest.

Many Thanks

[#5]

@Divya Thaore Are you see any errors in Browser Inspect element , Also check ambari-server logs

[#6]

@Divya Thaore

You are trying to access the sandbox:8080 from your laptop because localhost:8080 translates to your local windows machine. To be able to access sandbox ambari from your Windows machine, you should have an entry in your hosts file in C:\Windows\System32\drivers\etc with the format IP:FQDN:ALIAS for example

# localhost name resolution is handled within DNS itself.
#127.0.0.1     localhost
#::1           localhost
127.0.0.1      sandbox.hortonworks.com   sandbox    

With the above entry assuming you sandbox IP is correctly you can access your cluster through

http://sandbox:8080

HTH

[#7]

Hi @Shelton 

I followed your suggestion and modified HOSTS file in the C:\Windows\System32\drivers\etc on my Windows 7 machine where the VirtualBox/Sandbox is installed, it still prompts me the 502 error.

Here are the hosts file:

127.0.0.1 localhost
::1 localhost
127.0.0.1 sandbox.hortonworks.com sandbox

I used the Windows7 built-in Resource Monitor to inspect which application is using 8080, and it shows VirtualBox:

Since VirtualBox is where the sandbox resides, there is no way for me to terminate it. How do I then access Ambari from localhost?

Thank you very much if you can kindly help me to sort it out at your earliest convenience.

[#8]

instead of localhost try using the IP address of the server.  That should help