OPatch failed with error code 73

Issue faced during implementation of Patch on Oracle 11.2.0.4

ERROR:-

Prerequisite check "CheckActiveFilesAndExecutables" failed.
 The details are:


 Following executables are active :
 /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclntsh.so.11.1
 UtilSession failed: Prerequisite check "CheckActiveFilesAndExecutables" failed.
 Log file location: /u01/app/oracle/product/11.2.0.4/dbhome_1/cfgtoollogs/opatch/opatch2016-03-13_04-45-51AM_1.log

 OPatch failed with error code 73


SOLUTION:-

The problem is because of the library file (libclntsh.so.11.1) is not released by some process.

$/sbin/fuser /u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclntsh.so.11.1

/u01/app/oracle/product/11.2.0.4/dbhome_1/lib/libclntsh.so.11.1:  34224m


$ps -ef|grep  34224
$kill -9 34224