unix commands which are inside java code are not getting executed ,when we try to execute through oracle ebs concurrent program, but when we call from a PL/SQL anonymous block , it works fine.
can some one tell me what is the root cause of this issue
I want to mark this as answered.. so pasting again the solution in the Answer
the issue was , I was not aware of that we need to give grants for executing Java in Oracle. Answer is in the below another SO question