I would check the RAID health on the other node and see if there is any bad or dropped packets on both systems from the Console Screen enter CTRL ALT N then select the NIC and then select Info.
I added the last night new Ping Nodes after stopping the cluster. I wasn't able to start the cluster after than again. I had to reboot both nodes to get the cluster running again. The log says "remote ... unstable ... killing ... ". This must be a problem since up12.
You might want to send us the log file so if we can see any network issues or you can check the ha-debug log in the log file. Also check the NICs from the Console in CTRL ALT N then select the NIC and select Info to see if there is any RX or TX packets that are bad or dropped.
I have a similar problem again. I did nearly nothing and clicked only on some ISCSI targets to view the IQN and the Apache doesn't respond anymore. I get a blank page or connection timeout. This happens the second or third time. The last one on my node2 and today on node1 :-( . Last time, the console was extremely slow. In the actual case, I tried also restarting Apache, but after choosing "Apache control" and hitting enter, it throws me back to "Import data / Apache Control".
that would be strange. DSS is installed on HW raid1 with enterprise Seagate disks. Today I was able to Login into the Webpage, and click a bit around, but now it doesn't work again. :-( (I send you a private message)