Adop phase=fs_clone Failed With Error "RC-50204: Error: - WLS Admin Server Port in use" (Doc ID 1929751.1)

SYMPTOMS
When attempting to run "adop phase=fs_clone" command,
the following error occurs:
ValidatePatchFSPortPool:
[ERROR]: Some of the ports specified for the patch file system are not available.
-----------------------------
ERROR: The following required ports are in use:
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7001 : WLS Admin Server Port
Corrective Action: Free the listed ports and retry the adop operation.
Started execution : ADOPValidations.java
Validating if ports listed in PATCH file system context file are free or occupied
Checking Node Manager Port on xxxxxx: Port Value = 5556
Node Manager Port available: Port Value = 5556
Checking WLS Admin Server Port on vps2voraebs01: Port Value = 7001
RC-50204: Error: - WLS Admin Server Port in use: Port Value = 7001
CHANGES
 This issue occured during the following upgrade task (but can occur in other circumstances).
- Installed new 12.2.0 Vision instance and updated it to 12.2.4 as per doc. No. Oracle E-Business Suite Release 12.2.4 Readme (Doc ID 1617458.1)
- As per Section 6 Path A step no. 6, tried to execute fs_clone with fails with the above ports not available error.
CAUSE
The issue is caused by a port used by WLS Admin Server on the patch system which is not free (e.g port 7001).
Note:
The following command gives the current port used by the WLS Admin Server:
$ grep s_wls_adminport $CONTEXT_FILE
SOLUTION
To implement the solution, please execute the following steps:
1. Shut down all apps services on the RUN and PATCH file systems.
e.g.
. <EBS_ROOT>/EBSapps.env run
cd $INST_TOP/admin/scripts
adstpall.sh apps/apps
. <EBS_ROOT>/EBSapps.env patch
cd $INST_TOP/admin/scripts
adstpall.sh apps/apps
2. Make sure the port used by the WLS Admin Server is free and no processes are running from the Patch file system from the following command:
e.g.
$ netstat -a | grep xxxx
$ ps -eaf | grep xxxx
replace xxxx by the port listed in the autoconfig s_wls_adminport parameter and in the error message (e.g. 7001, 7002, ...)
Note:
The above commands should returns no activity on the related ports.
3. On the RUN file system, start up the adadmin server with the following command:
. <EBS_ROOT>/EBSapps.env run
cd $INST_TOP/admin/scripts
$ adadminsrvctl.sh start
4. Start the fs_clone from the beginning.
For a Single Node:
$ adop phase=fs_clone allnodes=no force=yes
For a Multi Node:
$ adop phase=fs_clone force=yes