I had the same issue on one of the node and it was related with /etc/resolv.conf entry. Changed the nameserver details to that of other nodes and that fixed it. ... View more

You are getting that in Chrome, I presume, so I also guess that you are attempting to connect to the Job History Server UI from a browser that is on a different host than instance-1.c.12345678.internal   That means your local host (where your browser is installed) cannot resolve the hostname "nstance-1.c.12345678.internal".  You will need to ensure your client host (where your browser is intalled) has hosts file or DNS configured to allow it to resolve the host to IP address.   This page has some tips on how to update your hosts file to resolve if needed. https://www.howtogeek.com/howto/27350/beginner-geek-how-to-edit-your-hosts-file/   You might also talk to Google if that is what cloud resource you are using and ask them how to get your external clients to be able to access internal addresses. ... View more

@Genthandsome,   Actually, that stackoverflow may be off target since it talks about public addresses.  Your browser needs to resolve a hostname into an IP so that your computer can connect to Hue.  If that resolution (or mapping) fails then the client (browser in this case) cannot connect to the host specified in the browser's URL. ... View more

@MughilWhat did you do,,,, How did you diagnose the problem? Where is the directory index? ... View more