Unable to Start OPMN and Eventually Essbase

I have been the victim of this a couple of times, where everything was installed and configured properly without issues, however when you try to start OPMN it goes off with following error message:

Starting opmn and all managed process...
opmnctl startall: opmn failed to start.

Error
--> Process (index=X,uid=X,pid=XXXX)
    failed to start a managed process after the maximum retry limit

If you have something in logs, you can find the root cause and rectify the issue. But in some cases, the worst part of the issue is you wont find anything in the logs which will point you in right direction. If you look at Essbase logs, they will go in loop, they will keep on repeating the same information and there will be no error in the logs.


One of the reasons:

When ever you try to start OPMN it try to bind using loopback address so when loopback address is not mapped with hostname opmn fails to start.

Here is a simple solution:
You need to make sure there is an entry of 127.0.0.1 in hosts file. Your host file should look like:

192.168.100.155 Hyperion-1
192.168.100.77  Hyperion-2
127.0.0.1 localhost.localdomain localhost




Cheers..!!
Rahul S.


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