I was seeing an error in production which resulted in a timeout error getting thrown roughly 2 min after a clonevm_task was kicked off. After a lot of digging it turns out there is setting in the web.config file that allows you to adjust the exexcution time of the httpruntime (http://msdn.microsoft.com/en-us/library/e1f13641(v=vs.85).aspx) the setting is executionTimeout the default (not set) value is just under 2 min which was what I was seeing. I have set this to 10 min as it appears a cloneVM_Task in our environment takes about 8 min to complete.