It was THER SAME cluster. Just disk IO was unusial - it worked as - delayed for 10 seconds (approx) - then all IO comes thru - then delayed again - loop
As a result, cluster did not recognized IO problems and never saw a second node (so conflicted for the heartbeat slot). To make it work, we just fixed iSCSI config and recreated OCFS2 fs, but did not touched cluster configuration. ----- Original Message ----- From: "Sunil Mushran" <[EMAIL PROTECTED]> To: "Alexei_Roudnev" <[EMAIL PROTECTED]> Cc: "Andy Kipp" <[EMAIL PROTECTED]>; <ocfs2-users@oss.oracle.com> Sent: Saturday, March 10, 2007 10:51 PM Subject: Re: [Ocfs2-users] ocfs2 cluster becomes unresponsive > The config error I would imagine would be that you defined two > different clusters, each not having the other node, and that the two > nodes have the same node number in both clusters. If so, the disk hb > would have detected this error. It would have spewed error messages > indicating that "some other nodes is heart beating in my slot". But yes, > it would not have fenced.... well I'll need to read the code to confirm. > > Alexei_Roudnev wrote: > > Just into your collection of _strange_ situations. I saw it few month ago. > > > > We built 2 node cluster with iSCSI shared disks. Due to configuration error, > > servers got the same nodeID, and > > it resulted in flip-flopping connection to the shared disk between them - > > fist server catched disk for 5 - 10 seconds, then > > second catched disk, then first and so on. > > > > Result - OCFSv2 assigned the same node slot to both nodes, never recognized > > that other node was active, and > > never fence or diagnose any problem (except uncyncronized IO, of course, > > which broke file system in some time). > > Looks as heartbeat alghoritm have some flow and don't detect some failures. > > > > > > > > _______________________________________________ > > Ocfs2-users mailing list > > Ocfs2-users@oss.oracle.com > > http://oss.oracle.com/mailman/listinfo/ocfs2-users > > > _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-users
