ipython/ipython — pull request #3600 by chapmanb (2013-07-10 17:14:22+00:00)
Title: Improved logging for errors during BatchLauncher.stop

This is a logging/debugging improvement that catches and reports errors when shutting down clusters using a BatchLaunder (qdel/bkill). The previous behavior was to silently fail if the external command failed. The patch captures error output and reports potential issues to the log.