EM 11G WebLogic Components (Admin, Managed servers in GCDomain) won't start, errors re: JMX Connectivity
(Doc ID 1308550.1)
Last updated on MARCH 26, 2021
Applies to:Enterprise Manager Base Platform - Version 22.214.171.124 to 126.96.36.199 [Release 11.1]
Information in this document applies to any platform.
Affects Enterprise Manager 11G release
Starting the Enterprise Manager service results in output such as:
Oracle Enterprise Manager 11g Release 1 Grid Control
Copyright (c) 1996, 2010 Oracle Corporation. All rights reserved.
WebTier Successfully Started
Starting Oracle Management Server...
Oracle Management Server Could Not Be Started
Oracle Management Server is Down
Please check <EM_INSTANCE_HOME>/em/EMGC_OMS1/sysman/log/emctl.log for error details
The administration server (https://<OMS_HOSTNAME>:<EM_CONSOLE_PORT>/console) never comes up properly and the URL is inaccessible.
The Admin server logs show something like :
####<Mar 29, 2011 1:24:04 PM EDT> <Info> <Server> <omshost.com> <EMGC_ADMINSERVER> <[STANDBY] ExecuteThread: '4' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1301419444322> <BEA-002634> <The server "EMGC_OMS1" disconnected from this server.>
The administration server on 9002 port comes up fine (https://<OMS_HOSTNAME>:<EM_CONSOLE_PORT>/console) comes up properly as the port is changed from default 7101 to 9002
In some rare cases, the Admin server may crash altogether when starting up the services. In this case, the above message would not even get printed into the log because the admin server would immediately crash instead.
The Managed server logs show
<Mar 29, 2011 1:24:03 PM EDT> <Critical> <WebLogicServer> <BEA-000362> <Server failed. Reason: Failed to start admin channel DefaultAdministration[admin]>
This is a sure sign the administration port has been enabled for the domain. Take the corrective action as documented below.
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In this Document
|Scenario 1: Admin port changed un-intentionally|
|Scenario 2: Admin port changed intentionally|