Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/19998#discussion_r157333856
--- Diff: dev/run-tests.py ---
@@ -253,9 +253,11 @@ 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
- subprocess.check_call(cmd, shell=True)
+ cmd = "%s -P |grep %s | grep LISTEN | awk '{ print $2; }' | xargs kill"
--- End diff --
Ah, @kiszk, I think we can actually use
`sparktestsupport.shellutils.which("...")` too like what we do for java:
https://github.com/apache/spark/blob/964e5ff22cefe336cd47d3a9309a8d1428b476b6/dev/run-tests.py#L153
So, like ..
```python
cmd = "%s -P |grep %s | grep LISTEN | awk '{ print $2; }' | xargs kill"
lsof_exe = which("lsof")
subprocess.check_call(cmd % (lsof_exe if lsof_exe else "/usr/sbin/lsof",
zinc_port), shell=True)
```
I just double checked:
```
>>> lsof_exe = which("lsof")
>>> cmd % (lsof_exe if lsof_exe else "/usr/sbin/lsof", zinc_port)
"/usr/sbin/lsof -P |grep 1234 | grep LISTEN | awk '{ print $2; }' | xargs
kill"
>>> lsof_exe = which("lsof")
>>> cmd % (lsof_exe if lsof_exe else "/usr/bin/lsof", zinc_port)
"/usr/sbin/lsof -P |grep 1234 | grep LISTEN | awk '{ print $2; }' | xargs
kill"
```
```
>>> lsof_exe = which("foo")
>>> cmd % (lsof_exe if lsof_exe else "/usr/sbin/lsof", zinc_port)
"/usr/sbin/lsof -P |grep 1234 | grep LISTEN | awk '{ print $2; }' | xargs
kill"
>>> lsof_exe = which("bar")
>>> cmd % (lsof_exe if lsof_exe else "/usr/bin/lsof", zinc_port)
"/usr/bin/lsof -P |grep 1234 | grep LISTEN | awk '{ print $2; }' | xargs
kill"
```
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