Author vstinner
Recipients jkloth, vstinner
Date 2019-09-18.14:16:38
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1568816199.04.0.921778192179.issue38207@roundup.psfhosted.org>
In-reply-to
Content
Hum, I see a similar behavior on Linux. Try attached communicate_close.py (I added newlines for readability):
---
vstinner@apu$ python3 communicate_close.py
process 1: pid 13089
process 1: process 2 spawned (pid 13090)
process 1: stdout pipe os.stat_result(st_mode=4480, st_ino=3107861, st_dev=12, st_nlink=1, st_uid=1000, st_gid=1000, st_size=0, st_atime=1568816000, st_mtime=1568816000, st_ctime=1568816000)
process 1: communicate with process 2 (pid 13090) ...

process 2: pid 13090
process 2: stdout os.stat_result(st_mode=4480, st_ino=3107861, st_dev=12, st_nlink=1, st_uid=1000, st_gid=1000, st_size=0, st_atime=1568816000, st_mtime=1568816000, st_ctime=1568816000)

process 3: pid 13092
process 3: stdout os.stat_result(st_mode=4480, st_ino=3107861, st_dev=12, st_nlink=1, st_uid=1000, st_gid=1000, st_size=0, st_atime=1568816000, st_mtime=1568816000, st_ctime=1568816000)

process 1 (thread): kill process 2 (pid 13090)
process 1 (thread): close process 2 stdout pipe (fd 3)

process 3: exit
process 1: communicate with process 2 (pid 13090) ... done in 5.1 sec
---

In process 1, communicate(<process 2>) does not complete immediately when the process 1 thread kills process 2 and closes process 2 stdout pipe.

communicate() only completes once process 3 completes.

The stdout file of process 2 and process 3 are the same file.
History
Date User Action Args
2019-09-18 14:16:39vstinnersetrecipients: + vstinner, jkloth
2019-09-18 14:16:39vstinnersetmessageid: <1568816199.04.0.921778192179.issue38207@roundup.psfhosted.org>
2019-09-18 14:16:39vstinnerlinkissue38207 messages
2019-09-18 14:16:38vstinnercreate