In JDK build 81, on linux i586 and linux amd54, when a executable program is put into PATH directory, Runtime.exec cannot use the PATH to find the program. This can be done in build 79 easily. Please look at a small test written to verify this:
/net/sqe/global/nfs/sec/users/william/runtime_error_test
To run the test, simply issue command:
ksh cmd.sh
Revise cmd.sh to verify if it works on b79.
This test is only designed for linux-i586. But the bug also happens on linux-amd64. Please revise the JDK_HOME in the cmd.sh to produce bug on linux-amd64 platform.