I was developing a script to demonstrate the subprocess call with a shell and without shell. I got the two processes working as they should. If if the parameters are not passed correctly, it will cause the stdin stream to close.
What I also discovered is that, the communicate call simply communicates with your child process, printing the returned information. While the documentation states you can pass in a string, doing so will cause the stream to close.
return p.communicate() <----- fine
return p.communicate(input) <-------NOT fine. Maybe because it's trying to put something back in the stream.
Anyway, I'm still looking into this and study the communicate() call more closely.
Patrick Palczewski <email@example.com> added the comment: Thanks. I will look at it some more.\\I have a pretty good debugger in IntelliJ, and it pointed to the fact that stdin and PIPE were returning a -1, so I followed that road. I agree. More testing with different parameters . It is noted that 2.7.2 actually has a clearer error code: it says IOError: Stream closed. On 04/04/2018 03:14 PM, Jeff Allen wrote:Jeff Allen <firstname.lastname@example.org> added the comment: tnsping is apparently an Oracle utility http://www.orafaq.com/wiki/Tnsping_______________________________________ Jython tracker <email@example.com> <http://bugs.jython.org/issue2664> _______________________________________