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POWhy is my python script that runs the adb shell monkey command crashing for large values of events?
 

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  1. POWhy is my python script that runs the adb shell monkey command crashing for large values of events?
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    <p>I have written a small python function that runs an adb shell monkey -p -v command along with an adb logcat command using subprocess.popen. For values larger than 100, this program crashes and I'm not sure why.</p> <p>here is monkey_runner.py</p> <pre><code>import os, subprocess def run_monkey_process(package, num_commands): monkeycmd = "adb shell monkey -p " + package + " -v " + num_commands monkeyprocess = subprocess.Popen(monkeycmd, stdout=subprocess.PIPE) logcatcmd = "adb logcat" logcatprocess = subprocess.Popen(logcatcmd, stdout=subprocess.PIPE) monkeystring = monkeyprocess.communicate(input=None)[0] logcatstring = logcatprocess.communicate(input=None)[0] monkeyreturncode = monkeyprocess.poll() logcatreturncode = logcatprocess.poll() if(monkeyreturncode &gt;=0): monkeyprocess.kill() logcatprocess.kill() return monkeystring, logcatstring else: print 'command failure' return 'you', 'fail' </code></pre> <p>I can put my gui code here too, but it's nothing special.</p> <p>Here is the stacktrace</p> <pre><code>Exception in Tkinter callback Traceback (most recent call last): File "C:\Python27\lib\lib-tk\Tkinter.py", line 1470, in __call__ return self.func(*args) File "C:\Users\brandon.dalesandro\Desktop\Zonar\mankey\monkey_runner_gui.py", line 25, in goCallBack returned = run_monkey_process(package, num) File "C:\Users\brandon.dalesandro\Desktop\Zonar\mankey\monkey_runner.py", line 8, in run_monkey_process logcatstring = logcatprocess.communicate(input=None)[0] File "C:\Python27\lib\subprocess.py", line 798, in communicate stdout = _eintr_retry_call(self.stdout.read) File "C:\Python27\lib\subprocess.py", line 478, in _eintr_retry_call return func(*args) KeyboardInterrupt </code></pre>
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    1. COWhat does "crashing" mean? Does it actually segfault and dump core? Or print out an exception traceback? Or return failure?
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      1. POWhy is my python script that runs the adb shell monkey command crashing for large values of events?
      1. USabarnert
    2. COThis isn't your problem here, but… you should never loop around `monkeyprocess.poll()`; that will have the same effect as just calling `monkeyprocess.wait()`, except to burn 100% CPU for no reason. (And while we're at it, never do `== None`, do `is None`, and putting extra parens around `if` and `while` conditions makes your code harder to read.)
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      1. POWhy is my python script that runs the adb shell monkey command crashing for large values of events?
      1. USabarnert
    3. COAlso, there is never a good reason to call `kill` after `terminate`. On POSIX, if `SIGTERM` didn't kill the process, `SIGKILL` isn't likely to help. On Windows, they both do the exact same thing. And calling `communicate` after kill is useless for the same reason it's useless after looping around `poll` or calling `wait`.
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      1. POWhy is my python script that runs the adb shell monkey command crashing for large values of events?
      1. USabarnert
 

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