At 03:46 PM 12/30/2010, harijay wrote:
Hi,
I am writing some multithreaded code which aims to automate three
sequential data processing applications and distribute the processing
on my 16GB RAM, 64 bit Ubuntu box running Python 2.6.5
The basic class that orchestrates these jobs use Queue.Queue() to feed
the product of the first job into the Queue for the next job.
Each Thread receives a dynamically generated shell script from some
classes I wrote and then runs the script using
subprocess.call(["shell_script_file.sh"])
You say dynamically generated. Any chance you are (re)using the same
filename each time? Is it possible that two uses of that filename
could occur at the same time? That is, is it possible that at the
same time while one process is running from the script file, another
process is trying to re-write the script file? And so maybe you need
to have dynamically generated and unique filenames
Most often I see references to binary executable files for the error
message, but I've also seen references to script files, e.g.
http://www.cyberciti.biz/faq/binbash-bad-interpreter-text-file-busy/
I tested the code on a mac laptop and also on ubuntu. Curiously on Mac
OSX 32 bit Core duo running snow leopard, the code always runs fine.
However on my ubuntu box I get sporadic errors detailed below.
I tried replacing the
subprocess.call() with
subprocess.Popen(["shellscriptfile.sh"],stdout=open("unique_process_id.log","w"),stderr=open("unique_error_log.log","w")
But I get the same "OSError: [Errno 26] Text file busy" error
Everytime I run the same job queue a different part of the job fails.
Unfortunately I dont see anybody else reporting this OSError. ANy help
in troubleshooting my "newbie" thread code will be greatly
appreciated.
Thanks
hari
The orchestrator class is at:
https://github.com/harijay/auriga/blob/master/process_multi.py
A sample thread subclass is at :
https://github.com/harijay/auriga/blob/master/scatomtzrunthread.py
Detailed error:
Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib/python2.6/threading.py", line 532, in
__bootstrap_inner
self.run()
File "/home/hari/Dropbox/auriga/scatomtzrunthread.py", line 28, in
run
stat = subprocess.call([file])
File "/usr/lib/python2.6/subprocess.py", line 480, in call
return Popen(*popenargs, **kwargs).wait()
File "/usr/lib/python2.6/subprocess.py", line 633, in __init__
errread, errwrite)
File "/usr/lib/python2.6/subprocess.py", line 1139, in
_execute_child
raise child_exception
OSError: [Errno 26] Text file busy
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