From: Christian Robottom Reis Subject: [NFS] Server-side locking issue Date: Thu, 8 May 2008 19:18:16 -0300 Message-ID: <20080508221815.GB4583@async.com.br> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" To: NFS@lists.sourceforge.net Return-path: Received: from neil.brown.name ([220.233.11.133]:56478 "EHLO neil.brown.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752623AbYEHWdZ (ORCPT ); Thu, 8 May 2008 18:33:25 -0400 Received: from brown by neil.brown.name with local (Exim 4.63) (envelope-from ) id 1JuEfy-0003ah-Hp for linux-nfs@vger.kernel.org; Fri, 09 May 2008 08:33:22 +1000 Sender: linux-nfs-owner@vger.kernel.org List-ID: Today, apparently at random, we had a locking problem on our LAN. Client applications hung, restarting them led to hangs, and the client dmesgs showed a familiar: [443619.682118] lockd: server anthem not responding, still trying So the server lockd apparently stopped responding to clients, and restarting clients got us nowhere. Eventually we cycled the server and everything's back to normal, but I'm pretty confused as to what happened. I couldn't scrape any evidence on the server that would point to why this happened -- no OOPS, error or even warning output. I was reading through the thread at http://groups.google.com.br/group/fa.linux.kernel/browse_thread/thread/6c7b5e49a46aef75/91adbb9f298db509?lnk=st&q=nfs+locking+server#91adbb9f298db509 and figured that it might be a similar problem I'm facing, but I'm not entirely sure as it's hard to say if somebody interrupted a client program or not (it's a large diskless network). Clients run 2.6.24-16-generic (stock Ubuntu Hardy) and server is 2.6.22-14-generic (stock Ubuntu Gutsy). If the problem happens again, what can I do on server and client to further debug the problem? And is there a utility that clears locks that we could use to avoid having to restart the server (acking the risks in cleared locks)? -- Christian Robottom Reis | http://async.com.br/~kiko/ | [+55 16] 3376 0125 ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs _______________________________________________ Please note that nfs@lists.sourceforge.net is being discontinued. Please subscribe to linux-nfs@vger.kernel.org instead. http://vger.kernel.org/vger-lists.html#linux-nfs