New submission from Henrique Andrade <h...@unscrambl.com>: A simple example like such demonstrates that one of the file descriptors associated with the underlying pipe will be leaked:
>>> from multiprocessing.queues import Queue >>> x = Queue() >>> x.close() Right after the queue is created we get (assuming the Python interpreter is associated with pid 8096 below): > ll /proc/8096/fd total 0 dr-x------ 2 hcma hcma 0 2018-03-15 14:03:23.210089578 -0400 . dr-xr-xr-x 9 hcma hcma 0 2018-03-15 14:03:23.190089760 -0400 .. lrwx------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 0 -> /dev/pts/25 lrwx------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 1 -> /dev/pts/25 lrwx------ 1 hcma hcma 64 2018-03-15 14:03:23.210089578 -0400 2 -> /dev/pts/25 lr-x------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 3 -> pipe:[44076946] l-wx------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 4 -> pipe:[44076946] lr-x------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 5 -> /dev/urandom After close(): > ll /proc/8096/fd total 0 dr-x------ 2 hcma hcma 0 2018-03-15 14:03:23.210089578 -0400 . dr-xr-xr-x 9 hcma hcma 0 2018-03-15 14:03:23.190089760 -0400 .. lrwx------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 0 -> /dev/pts/25 lrwx------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 1 -> /dev/pts/25 lrwx------ 1 hcma hcma 64 2018-03-15 14:03:23.210089578 -0400 2 -> /dev/pts/25 lr-x------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 3 -> pipe:[44076946] l-wx------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 4 -> pipe:[44076946] lr-x------ 1 hcma hcma 64 2018-03-15 14:03:33.145998954 -0400 5 -> /dev/urandom ---------- components: Library (Lib) messages: 313899 nosy: Henrique Andrade priority: normal severity: normal status: open title: multiprocessing Queue leaks a file descriptor associated with the pipe writer versions: Python 2.7 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33081> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
