Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7878#discussion_r36049673
--- Diff: dev/run-tests.py ---
@@ -283,16 +284,35 @@ def get_hadoop_profiles(hadoop_version):
sys.exit(int(os.environ.get("CURRENT_BLOCK", 255)))
+def get_zinc_port():
+ """
+ Get a randomized port on which to start Zinc
+ """
+
+ return random.randrange(3030, 4030)
+
+
+def kill_zinc_on_port(zinc_port):
+ """
+ Kill the Zinc process running on the given port, if one exists.
+ """
+
+ cmd = ("/usr/sbin/lsof -P |grep %s | grep LISTEN "
+ "| awk '{ print $2; }' | xargs kill") % zinc_port
+ # TODO: Not sure what happens here if no process exists
--- End diff --
On a non-zero exit code, `run_cmd` will print an error message and will
call `sys.exit()`, so we may want to ensure that this always returns a zero
exit code. If this is a concern, you could always just perform the underlying
`subprocess` call yourself.
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