R12 E-Business Suite Applications Manager Clone Process Fails With Error ‘AC-50006: Could not assign any APPL_TOP name to this instance’ When Running Adcfgclone.pl AppsTier On An Environment

APPLIES TO:
Oracle Applications Manager - Version 12.1.3 and later

SYMPTOMS:
E-Business Suite R12 Applications Manager, Rapidclone related issues

java.lang.Exception: AC-50006: Could not assign any APPL_TOP name to this instance.

Raised by oracle.apps.ad.tools.configuration.ATNameHandler
ERRORCODE = 1 ERRORCODE_END
.end std out.

Other error messages may include:

Result : FAILED
===========================================================================
AC-50207: Fatal: Failed to execute one or more of the config tools during Context Value Management
Deactivating Context Value Management System.
System Exit Status: 1
===========================================================================

Aborting the running of Context Value Management
Exception Occurred while running CVM: java.lang.Exception: Fatal Exception

StackTrace:
java.lang.Exception: Fatal Exception
at oracle.apps.ad.context.CtxValueMgt.processCSH(CtxValueMgt.java:1360)
at oracle.apps.ad.context.CtxValueMgt.processCtxFile(CtxValueMgt.java:1653)
at oracle.apps.ad.clone.ApplyApplTop.runCVM(ApplyApplTop.java:510)
at oracle.apps.ad.clone.ApplyApplTop.runAutoConfig(ApplyApplTop.java:552)
at oracle.apps.ad.clone.ApplyApplTop.doConf(ApplyApplTop.java:339)
at oracle.apps.ad.clone.ApplyApplTop.doApply(ApplyApplTop.java:382)
at oracle.apps.ad.clone.ApplyApplTop.<init>(ApplyApplTop.java:267)
at oracle.apps.ad.clone.ApplyAppsTier.<init>(ApplyAppsTier.java:105)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at oracle.apps.ad.clone.util.CloneProcessor.run(CloneProcessor.java:67)
at java.lang.Thread.run(Thread.java:619)

The issue can be reproduced at will with the following steps:
1. Log on to application 12.1.3 instance
2. Source environment file
3. Run adcfgclone apps tier

The issue has the following business impact:

Administrator is not able to complete a DRC clone, and thus cannot release the instance to users.

CAUSE:
Incorrect host name in /etc/hosts file.

SOLUTION:
To resolve the issue test the following steps in a development instance and then migrate accordingly:
1. Ensure a valid backup of the instance exists.
2. Check whether server name is resolvable / pingable and listed in the following files:
A. /etc/hosts file or in
B. DNS Server
3. If the server name is not pingable, check the host entry in /etc/hosts and confirm the information is correct.
4. If any typos are found in the host entry, edit the /etc/hosts file with correct host details.
5. Run adcfgclone on apps tier to cascade the changes.
6. Retest the clone process and confirm it now completes successfully.
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