ADPATCH:How to apply a Patch

How to apply a Patch?


Step 1 -Download the patch from metalink.
It is better to check the table 'AD_BUGS' if the patch is already applied then no need to apply again.
you can check list of applied patches as follows:

select
  from ad_bugs 
where bug_number = 'patch_number';

if this query returns any row then it means this patch is already applied.
 
Step 2 -Check all Per-requisites from read me file. First apply all the patche(s) which are listed in pre-requisites (if any) and then apply the required patch and if there is/are any patch suggested in post-requisite then apply those too.
Step -3 Check successful patch completion condition from read me file.
(If successful patch condition already meets then no need to apply the patch.)

Step -4 Upload the patch in patch directory (i.e /appshome/patch) in zip format
Extract the patch through following
unzip <file name>
Step -5 Down the application services of concerned instance. Or do exactly what else is written in "Pre-requisite" if any.
Step -6 Run .env file of concerned instance. (Optional)
e.g (/appshome/appsuat1/UAT1/apps/apps_st/appl/APPSUA T1_erpappdev.env)
Step -7 Go to the directory /appshome/patch (i.e cd /appshome/patch)
  
Step -8 Enter the command adadmin, following command lines will appear after adadmin.
                                                                 

(Press ENTER for default value )
     
(Enter the log file name with extension .log or Press Enter for default value)
(Press ENTER for default value)

(Press ENTER for default value)

(Press ENTER for default value)
(Enter the system password usually its password is 'manager')
(Enter the SYSTEM Password or Press ENTER for DEFAULT)

 Enter 5 as your choice (Change Maintenance Mode)
 

Enter 1 as your choice (Enable Maintenance Mode)
Enter 3 as your choice (Return to main menu)
     
Enter 6 as your choice (Exit adadmin area)
     Step -9 Enter the command adpacth
(Press ENTER for default value)
 (Enter the adpatch log file name with extension .log)
(Press ENTER for default value)
 (Press Enter for default batch size)
 (Enter the SYSTEM Password)
 (Enter the apps password)
 (Select or enter your directory where patch is placed)
(Enter the driver file name placed in patch directory with .drv extension)
* Auto patch process will start now, follow the following steps after completion of auto patch.
Step -10 Enter the adadmin command again to disable maintenance mode.
                Repeat complete Step 8 and follow the following screen
Step -11 Bounce the services of DB.
Step -12 Up the application services.


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