Thanks for the response. I figured out the cause. I used "cman_tool leave remove" when I shutdown the other 2 nodes. In this way, the remaining one/cluster had "quorum: 1, and expected vote 1". I was surprised that the "2 node cluster" special case did not prevent this. My remaining question is: Do you see any potential risks such as "split brain" when the stopped nodes come back, especially in a more-node cluster (say 5 node cluster)? Thanks, Dex -----Original Message----- From: linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Lon Hohberger Sent: Thursday, April 12, 2007 12:34 PM To: linux clustering Subject: Re: RHEL 4: quorate or inquorate On Tue, Apr 10, 2007 at 12:27:29PM -0600, Dex Chen wrote: > Hi, all: > > We saw a rare situation that a 3 node cluster has 2 nodes offline, but > it maintains quorum. Is there anyone has any idea how it could happen > and what/where I should look into. > > Here is the output from clustat on one of the nodes: > > Member Status: Quorate > > Member Name Status > ------ ---- ------ > lizard01 Offline > lizard02 Online, Local, rgmanager > lizard03 Offline > > Service Name Owner (Last) State > ------- ---- ----- ------ ----- > 192.168.210.121 lizard02 started > 192.168.210.122 lizard02 started > 192.168.210.123 lizard02 started > 192.168.210.124 lizard02 started > > > We are on REHL 2.6.9-34 (update 4). Could you include: cman_tool status cman_tool nodes You can do this if you are using qdisk, but it's not generally supposed to happen. -- Lon -- Lon Hohberger - Software Engineer - Red Hat, Inc. -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
