Hi,
  I am having two issue with the QuickBuild nodes as the follows:
 1) I received many alerts with similar message, "Build Agent '<AgentName>' is removed from active list as server has not hear from it for 12 seconds" although the build machines were still up and running fine. Please advise me on this issue.
 2) When a node is offline, all of the jobs which are assigned to that node are automatically cancelled by QuickBuild. I think the jobs are supposed to wait for the node until it is back online and then resume the operations. Please advise me on this issue too.

 Thanks,
-Phong