Opatch failed with executable is active

While patching a standalone database i got the error saying opatch failed with libclntsh.so.11.1 executable locked.

here is what i did to fix it


Prerequisite check "CheckActiveFilesAndExecutables" failed.
The details are:
Following executables are active :
/opt/app/oracle/product/11.2.0/11.2.0.4/lib/libclntsh.so.11.1


Run the below command. Note down the number 9795 in my case and kill it.

/sbin/fuser /opt/app/oracle/product/11.2.0/11.2.0.4/lib/libclntsh.so.11.1

/opt/app/oracle/product/11.2.0/11.2.0.4/lib/libclntsh.so.11.1:     9795m

kill -9 9795