running external executables

[Gyan Prakash Srivastava]

I am executing another program (primegens.exe) file using ProcessBuiler() in my java code. this executable executes other executables (inside this) in a for loop like blastall.exe and primer3.exe depending on the side of input.

now when I run the Java code, it is hanged! if I terminate this external process manually then java code execute rest of it. interestingly the same executable primegens.exe works fine while running from MS command Prompt.

[Layne Lund]

Your description gives me a general idea of what you are TRYING to do. However, you need to post some code in order for us for us to see what your program is ACTUALLY doing.

Layne

[Harald Kirsch]

Originally posted by Gyan Prakash Srivastava:
now when I run the Java code, it is hanged! if I terminate this external process manually then java code execute rest of it. interestingly the same executable primegens.exe works fine while running from MS command Prompt.

From the few bits of info you provide my guess is that primegens.exe writes to System.out and/or System.err until the output buffer is full and then gets stuck. The Java program that does the exec does not drain the two streams, but just waits for the process to finish --- deadlock.

Before Java does not get proper process control features, something like my http://www.ebi.ac.uk/~kirsch/monq-doc/monq/stuff/Exec.html may help.
[ October 14, 2005: Message edited by: Harald Kirsch ]