How can Can We Use Hot Patch

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Problem:    

How can Can We Use Hot Patch 

If you use hotpatch and a file in the patch is in use by the application, it will not be updated
by the patch as the file will be locked and will not be over-written by the copy portion of the
patch driver

During a patch application the recommended option is to Enable Maintenance node. If the Maintenance Mode is not enable you will get an error like :

sqlplus -s &un_apps/***** @$AD_TOP/patch/115/sql/adsetmmd.sql ENABLE 
Error: 
Program exited with status 3 
Cause: The program terminated, returning status code 3. 
Action: Check your installation manual for the meaning of this code on this operating system. 
An error occurred while running adsetmmd.sql. 
Continue as if it were successful [No] : Yes 
Could not enable Maintenance Mode. 
Review the messages above, then press [Return] to continue.
...
To apply a patch without maintenance mode enabled use this syntax :

 adpatch options=hotpatch  

References:

Note  375130.1

    

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