for point 2there maybe some timeout setting on the network - if it cant see it for a period of time it may think the cluster is dead.
Is the newtowrk under load when it drops out? On Thu, Oct 2, 2008 at 2:28 PM, James Holmes <[EMAIL PROTECTED]> wrote: > We have two problems with clustering our CF 8.01 Multiserver (i.e. JRun) > installs. > > 1) Session replication is broken. When we turn off an instance in a cluster > that has session replication and stickiness turned on, the next server that > gets the request throws a null pointer error when trying to run > Application.cfc to establish the session. We've confirmed this by clearing > the session cookies on the browser; this enables the server to respond > correctly as it can then set up its own session. Turning off session > replication makes this go away. Any ideas what might be wrong with our > setup > to cause session replication to fail? > > 2) Half way through yesterday, our clustering started to fail. Up until now > all the servers have behaved properly, all joining the cluster correctly. > Now, servers will drop out of the cluster for no reason, only to re-join > later on. They intermittently drop in and out of the cluster. The > most interesting part is that when they drop out, they do it in pairs. Each > pair of servers in the same datacentre stay clustered; they seem to lose > the > connection with the servers in the other datacentre (we have four servers, > two in each datacentre, all on the same VLAN subnet). I've tried adding the > servers as unicast peers rather than letting the multicast discovery find > them, but it didn't help. If anyone has ideas about how best to monitor the > connections between the servers and get an idea of why the servers are > dropping out of the cluster, please let me know. > > mxAjax / CFAjax docs and other useful articles: > http://www.bifrost.com.au/blog/ > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:313377 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
