[issue12738] Bug in multiprocessing.JoinableQueue() implementation on Ubuntu 11.04

Davin Potts added the comment: Closing this very stale issue as out of date with no response from OP since request months ago for enough info to be able to proceed. -- resolution: -> out of date status: pending -> closed ___ Python tracker

[issue12738] Bug in multiprocessing.JoinableQueue() implementation on Ubuntu 11.04

Changes by Davin Potts : -- status: open -> pending ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mai

[issue12738] Bug in multiprocessing.JoinableQueue() implementation on Ubuntu 11.04

Davin Potts added the comment: Thank you for the provided test case but because it depends upon compiled code (the libsvm.so.2 file you supplied) it: (1) makes me wonder if the issue might not arise from an issue inside the supplied library (perhaps it was not rebuilt properly on your Ubuntu 11

[issue12738] Bug in multiprocessing.JoinableQueue() implementation on Ubuntu 11.04

Michael Hall added the comment: I tried switching from joining on the work_queue to just joining on the individual child processes, and it seems to work now. Weird. Anyway, it'd be nice to see the JoinableQueue fixed, but it's not pressing any more. -- ___

[issue12738] Bug in multiprocessing.JoinableQueue() implementation on Ubuntu 11.04

Michael Hall added the comment: Okay, I have attached the code I've been using. Don't worry about what it does (it's a biology thing), but just follow these steps: 1. Make sure you have numpy and scipy installed. 2. Extract the zip file. 3. Run it with ./svm_main.py test_obligate.dat test_tran

[issue12738] Bug in multiprocessing.JoinableQueue() implementation on Ubuntu 11.04

Meador Inge added the comment: Michael, It is hard to tell from your description alone where the bug is. Could you provide more detailed reproduction steps with a test case that exhibits the issue? -- nosy: +jnoller, meador.inge stage: -> test needed __

[issue12738] Bug in multiprocessing.JoinableQueue() implementation on Ubuntu 11.04

Michael Hall added the comment: Edit: Sorry, I should have been more clear. The hang occurs after the first child process exits, at which point all four children become zombies (none of the others exit, they just zombify immediately), and the main process sits there waiting forever for the re

[issue12738] Bug in multiprocessing.JoinableQueue() implementation on Ubuntu 11.04

New submission from Michael Hall : I recently switched to Ubuntu 11.04 from OpenSUSE 11.4, and when I go to run a project I coded a couple days ago under OpenSUSE using the multiprocessing library, it hangs when it did not under OpenSUSE. Specifically, I am using two queues, work_queue from wh