From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS14383 205.234.109.0/24 X-Spam-Status: No, score=-0.5 required=5.0 tests=AWL,MSGID_FROM_MTA_HEADER, RP_MATCHES_RCVD shortcircuit=no autolearn=unavailable version=3.3.2 Path: news.gmane.org!not-for-mail From: Eric Wong Newsgroups: gmane.comp.lang.ruby.unicorn.general Subject: Re: Kernel.srand after_fork Date: Fri, 28 Jan 2011 10:26:49 +0000 Message-ID: <20110128102649.GB25922@dcvr.yhbt.net> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1296210707 32330 80.91.229.12 (28 Jan 2011 10:31:47 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 28 Jan 2011 10:31:47 +0000 (UTC) To: unicorn list Original-X-From: mongrel-unicorn-bounces@rubyforge.org Fri Jan 28 11:31:44 2011 Return-path: Envelope-to: gclrug-mongrel-unicorn@m.gmane.org X-Original-To: mongrel-unicorn@rubyforge.org Delivered-To: mongrel-unicorn@rubyforge.org Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-BeenThere: mongrel-unicorn@rubyforge.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: mongrel-unicorn-bounces@rubyforge.org Errors-To: mongrel-unicorn-bounces@rubyforge.org Xref: news.gmane.org gmane.comp.lang.ruby.unicorn.general:838 Archived-At: Received: from rubyforge.org ([205.234.109.19]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PilcF-0001bB-IU for gclrug-mongrel-unicorn@m.gmane.org; Fri, 28 Jan 2011 11:31:43 +0100 Received: from rubyforge.org (rubyforge.org [127.0.0.1]) by rubyforge.org (Postfix) with ESMTP id CC9A1185838A; Fri, 28 Jan 2011 05:31:42 -0500 (EST) Received: from dcvr.yhbt.net (dcvr.yhbt.net [64.71.152.64]) by rubyforge.org (Postfix) with ESMTP id 7452A1858392 for ; Fri, 28 Jan 2011 05:26:50 -0500 (EST) Received: from localhost (unknown [127.0.2.5]) by dcvr.yhbt.net (Postfix) with ESMTP id D91CA1F69C; Fri, 28 Jan 2011 10:26:49 +0000 (UTC) ghazel@gmail.com wrote: > Hi, > > We recently noticed random numbers from the Unicorn workers were > turning up lots of duplicates across requests. Is it possible that the > random seed generated when the ruby interpreter starts is duplicated > when the workers are forked, and not re-seeded after fork? > > If so, should I call Kernel.srand in after_fork, or is this something > which should be added to Unicorn? It looks like a 1.8 bug, which version of Ruby are you running? Ruby 1.9.1 actually had a bug where it was reseeded improperly and led to segfaults (see KNOWN_ISSUES). 1.9.2 is fine afaik. -- Eric Wong _______________________________________________ Unicorn mailing list - mongrel-unicorn@rubyforge.org http://rubyforge.org/mailman/listinfo/mongrel-unicorn Do not quote signatures (like this one) or top post when replying