We have a two node cluster, the http virtual server instance 100 failes every now and then and moves the resources to another server, i am not sure what causes this,, checked event and cluster logs not much info,,if any one has any idea about this issue and a fix, will be really appriciated.thanksmatpdi

could be something like this, http://forums.techarena.in/showthread.php?t=443247 but really need more detail. What versions of exchange/windows? Anything of interest in cluster.log ?

thanks for the replying,,we have win2003 ent exchange 2003 sp2 if you use cluster diag tool and view logs,, most of thelines look like these..130:130.10/24[04:58:52.993](034771) ERR Microsoft Exchange DAV Server Instance <Exchange HTTP Virtual Server Instance 100 (EXCHCLUSTER)>: [EXRES] DwMonitorPrimaryThread: secondary thread failed. Error 10054.

I always ask, but you have run ExBPA health check against your cluster right? Also, have you recently locked down what IP's are allowed to connect the HTTP service?