Master branch - can't run up systemvm with KVM hypervisor

[Nguyen Anh Tu]

Hi guys,

I'm trying to deploy CS (master branch) with KVM hypervisor but get error
when running up systemVM.

Primary error here:

2013-12-09 01:19:02,237 WARN  [kvm.resource.LibvirtComputingResource]
(agentRequest-Handler-5:null) LibvirtException
org.libvirt.LibvirtException: internal error unknown disk cache mode 'null'
        at org.libvirt.ErrorHandler.processError(Unknown Source)
        at org.libvirt.Connect.processError(Unknown Source)
        at org.libvirt.Connect.processError(Unknown Source)
        at org.libvirt.Connect.domainCreateXML(Unknown Source)
        at
com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.startVM(LibvirtComputingResource.java:1139)
        at
com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.execute(LibvirtComputingResource.java:3399)
        at
com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.executeRequest(LibvirtComputingResource.java:1233)
        at com.cloud.agent.Agent.processRequest(Agent.java:501)
        at com.cloud.agent.Agent$AgentRequestHandler.doTask(Agent.java:808)
        at com.cloud.utils.nio.Task.run(Task.java:81)
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:701)


Full Log from Agent here:

http://pastebin.com/6rtRFbdx

Anyone can help?

Thanks,

--Tuna