OMS 12c is throwing Error when checking webtier status: Connection refused: connect
After 2-system OMS upgrade from 11g -> 12c, I 've had an issue with weblogic certificate and couldn't access EM URL https://servername.domain.com:7799/em through IE11.
So I re-generated DemoIdentity and DemoTrust and used "emctl secure oms" command to update certificate I use.
OMS came up successfully but now I get Connection refused error when I access the URL. (404 not found on the front)
\oracle\app\product\mw1\oms>emctl status oms
Oracle Enterprise Manager Cloud Control 12c Release 5
Copyright (c) 1996, 2015 Oracle Corporation. All rights reserved.
WebTier is Down
Oracle Management Server is Up
2016-03-09 13:02:39,329 [main] INFO commands.StartCommand startOMS.414 - startOMS finished with result: 0