Issue #9525 has been updated by Naotoshi Seo. Thank you! Let me write a note here. On my current environment, the glibc version was glibc-2.12-1.47.el6.x86_64. I checked the latest centos rpm http://vault.centos.org/6.5/os/Source/SPackages/glibc-2.12-1.132.el6.src.rpm, but it looked RHED/CentOS is not backporting it yet (cf. https://gist.github.com/sonots/9065060) ---------------------------------------- Bug #9525: Stuck with Socket.pack_sockaddr_in https://bugs.ruby-lang.org/issues/9525#change-45228 * Author: Naotoshi Seo * Status: Third Party's Issue * Priority: Normal * Assignee: * Category: * Target version: * ruby -v: 1.9.3p194 * Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN, 2.1: UNKNOWN ---------------------------------------- We met this trouble with Fluentd https://github.com/fluent/fluentd. Fluentd is sometimes stuck at `Socket.pack_sockaddr_in` line on shutdown. Here is the gist https://gist.github.com/sonots/9047653 to explain details. -- http://bugs.ruby-lang.org/