INADA Naoki <songofaca...@gmail.com> added the comment:
> What is also useful to know, is that I'm observing this on a legacy RHEL 6 > system *with a customized kernel* part of the Scyld ClusterWare > (https://www.penguincomputing.com/products/software/scyld-clusterware/) that > *cannot* be updated: Do you mean this trouble is happened only on the system? Or can this trouble be reproducible on normal Linux kernel? --- I think there are no bug in Python. See this part of your strace ``` pipe([5, 6]) = 0 fcntl(5, F_GETFD) = 0 fcntl(5, F_SETFD, FD_CLOEXEC) = 0 fcntl(6, F_GETFD) = 0 fcntl(6, F_SETFD, FD_CLOEXEC) = 0 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x2ad3c972adf0) = 239074 close(6) = 0 mmap(NULL, 1052672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ad3ca8ed000 read(5, ``` Python creates pipe [5, 6], and set FD_CLOEXEC flag to them. When `exec` in child process succeeded, these FDs must be closed by Linux kernel. Then, `read(5,` in parent process must not be blocked. It must return 0 soon. So I think there are some bug in your kernel, relating to CLOEXEC. I am not interested in this issue much because 2.6.32 is too old to me and I never used "Scyld ClusterWare". Maybe, you can consult with the company. ---------- nosy: +inada.naoki _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue35305> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
