Where is your "Interrupted System Call" occuring? Is this on a call to accept, 4-arg select, or Oracle? Showing the code connected with the error message might help.
I believe "Interrupted System Call" is usally EINTR (on HPUX), which means a system operation recieved a signal which you are handling, and was interrupted. Are you trapping signals yourself? For example, are you using alarm to timeout an accept, when maybe you should be using a non-blocking socket with (4-arg) select?