Setting ENCRYPTION_WALLET_LOCATION

Use an environment variable such as ORACLE_SID in the definition of ENCRYPTION_WALLET_LOCATION so that the path to each directory will be uniquely identified. And specify ENCRYPTION_WALLET_LOCATION in sqlnet.ora so that each database can access its own wallet.

Example:

ENCRYPTION_WALLET_LOCATION =
   (SOURCE =
     (METHOD = FILE)
    (METHOD_DATA =
      (DIRECTORY = /u01/app/oracle/admin/$ORACLE_SID/wallet)
   )
   )