"oracle.ons.SubscriptionException Subscription request timed out" When Accessing Oracle Application Server Control (Doc ID 1075347.1)

Last updated on FEBRUARY 15, 2017

Applies to:

Oracle Fusion Middleware - Version: 10.1.2.0.0 to 10.1.2.3.0 - Release: AS10gR2 to AS10gR2
Information in this document applies to any platform.

Symptoms

After starting Oracle Application Server Control (ASC) using "emctl start iasconsole", accessing  ASC using http://hostname:1156/emd/console/ias/clusters/farm$farm=infra.hostname  fails with following error in the browser page:
An error was encountered while loading page. The most likely causes are:

1. TaskMaster cannot read configuration files, such as $ORACLE_HOME/opmn/conf/opmn.xml, and $ORACLE_HOME/dcm/dcm.conf, etc.
2. Cannot connect to the repository.
Resolution:
1. Make sure that the system configuration files are present and the permission for those files are set correctly.
2. If you are using Infrastructure Database, please make sure that the database is up and running, and the listener for the database is running. Also check the connectivity of the machine to the Database Repository. Please refer to the exception thrown by the Repository API for resolution. The Repository API may be misconfigured.
Base Exception:
oracle.ons.SubscriptionException
Subscription request timed out after 120000 millseconds. Possible causes: OPMN may not be running, you may have an OPMN running in an alternate ORACLE_HOME using duplicate port values, or OPMN may be misconfigured.. Subscription request timed out after 120000 millseconds. Possible causes: OPMN may not be running, you may have an OPMN running in an alternate ORACLE_HOME using duplicate port

$ORACLE_HOME/opmn/logs/ons.log contain following entries:
10/03/16 11:30:21 [4] Local connection 0,127.0.0.1,6101 invalid form factor
java; Home=/u01/oracle/product/infra
10/03/16 11:30:24 [4] Local connection 0,127.0.0.1,6101 invalid form factor
java; Home=/u01/oracle/product/infra
10/03/16 11:30:27 [4] Local connection 0,127.0.0.1,6101 invalid form factor
java; Home=/u01/oracle/product/infra

Cause

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