环境是CS4.2+KVM(Ubuntu12.04) all-in-one的基础网络模式，在VM关机状态下创建快照时可以看到 VM快照
中状态一直是creating。但存储中并无文件生成。而且在日志中会有
2013-09-29 09:35:23,600 WARN [agent.manager.AgentManagerImpl]
(Job-Executor-2:job-84 = [ 538f1c49-f0fc-425c-a1c8-f2216cfad797 ])
Unsupported Command: Unsupported command
issued:com.cloud.agent.api.CreateVMSnapshotCommand. Are you sure you got
the right type of server?
但是在https://cwiki.apache.org/confluence/display/CLOUDSTACK/VM+Snapshots
中看到是支持此种快照的，大家有遇到过的没？该怎么解决呢[image: 内嵌图片 1]
完整日志如下：
2013-09-29 09:35:22,968 DEBUG [cloud.api.ApiServlet]
(catalina-exec-24:null) ===START=== 192.168.0.9 -- GET
command=createVMSnapshot&virtualmachineid=8c2fe24d-1d43-46d4-8bf2-1167a49c1f3b&snapshotmemory=false&name=i-2-7&response=json&sessionkey=I2ZLCc9lxhI5d6QBDr1m1KqCrvU%3D&_=1380418530189
2013-09-29 09:35:23,302 DEBUG [cloud.async.AsyncJobManagerImpl]
(catalina-exec-24:null) submit async job-84 = [
538f1c49-f0fc-425c-a1c8-f2216cfad797 ], details: AsyncJobVO {id:84, userId:
2, accountId: 2, sessionKey: null, instanceType: None, instanceId: 3, cmd:
org.apache.cloudstack.api.command.user.vmsnapshot.CreateVMSnapshotCmd,
cmdOriginator: null, cmdInfo:
{"id":"3","response":"json","sessionkey":"I2ZLCc9lxhI5d6QBDr1m1KqCrvU\u003d","virtualmachineid":"8c2fe24d-1d43-46d4-8bf2-1167a49c1f3b","cmdEventType":"VMSNAPSHOT.CREATE","ctxUserId":"2","snapshotmemory":"false","name":"i-2-7","httpmethod":"GET","_":"1380418530189","ctxAccountId":"2","ctxStartEventId":"309"},
cmdVersion: 0, callbackType: 0, callbackAddress: null, status: 0,
processStatus: 0, resultCode: 0, result: null, initMsid: 152831914162318,
completeMsid: null, lastUpdated: null, lastPolled: null, created: null}
2013-09-29 09:35:23,303 DEBUG [cloud.async.AsyncJobManagerImpl]
(Job-Executor-2:job-84 = [ 538f1c49-f0fc-425c-a1c8-f2216cfad797 ])
Executing
org.apache.cloudstack.api.command.user.vmsnapshot.CreateVMSnapshotCmd for
job-84 = [ 538f1c49-f0fc-425c-a1c8-f2216cfad797 ]
2013-09-29 09:35:23,305 DEBUG [cloud.api.ApiServlet]
(catalina-exec-24:null) ===END=== 192.168.0.9 -- GET
command=createVMSnapshot&virtualmachineid=8c2fe24d-1d43-46d4-8bf2-1167a49c1f3b&snapshotmemory=false&name=i-2-7&response=json&sessionkey=I2ZLCc9lxhI5d6QBDr1m1KqCrvU%3D&_=1380418530189
2013-09-29 09:35:23,554 DEBUG [agent.transport.Request]
(Job-Executor-2:job-84 = [ 538f1c49-f0fc-425c-a1c8-f2216cfad797 ]) Seq
1-763887735: Sending { Cmd , MgmtId: 152831914162318, via: 1, Ver: v1,
Flags: 100011,
[{"com.cloud.agent.api.CreateVMSnapshotCommand":{"vmState":"Stopped","volumeTOs":[{"id":6,"name":"ROOT-4","path":"78c2cd2b-9aef-4de3-8bdd-96d2219cac0a","size":17179869184,"type":"ROOT","storagePoolType":"NetworkFilesystem","storagePoolUuid":"99f05403-3762-35b9-9adc-de8dfa648fd0","deviceId":0}],"target":{"id":3,"snapshotName":"i-2-4-VM_VS_20130929013522","type":"Disk","current":false},"vmName":"i-2-4-VM","guestOSType":"Windows
Server 2003 Enterprise Edition(32-bit)","wait":1800}}] }
2013-09-29 09:35:23,599 DEBUG [agent.transport.Request]
(AgentManager-Handler-14:null) Seq 1-763887735: Processing: { Ans: ,
MgmtId: 152831914162318, via: 1, Ver: v1, Flags: 10,
[{"com.cloud.agent.api.UnsupportedAnswer":{"result":false,"details":"Unsupported
command issued:com.cloud.agent.api.CreateVMSnapshotCommand. Are you sure
you got the right type of server?","wait":0}}] }
2013-09-29 09:35:23,600 DEBUG [agent.transport.Request]
(Job-Executor-2:job-84 = [ 538f1c49-f0fc-425c-a1c8-f2216cfad797 ]) Seq
1-763887735: Received: { Ans: , MgmtId: 152831914162318, via: 1, Ver: v1,
Flags: 10, { UnsupportedAnswer } }
2013-09-29 09:35:23,600 WARN [agent.manager.AgentManagerImpl]
(Job-Executor-2:job-84 = [ 538f1c49-f0fc-425c-a1c8-f2216cfad797 ])
Unsupported Command: Unsupported command
issued:com.cloud.agent.api.CreateVMSnapshotCommand. Are you sure you got
the right type of server?
2013-09-29 09:35:23,600 ERROR [vm.snapshot.VMSnapshotManagerImpl]
(Job-Executor-2:job-84 = [ 538f1c49-f0fc-425c-a1c8-f2216cfad797 ]) Create
vm snapshot i-2-4-VM_VS_20130929013522 failed for vm: i-2-4-VM due to
com.cloud.agent.api.UnsupportedAnswer cannot be cast to
com.cloud.agent.api.CreateVMSnapshotAnswer
2013-09-29 09:35:23,721 ERROR [cloud.async.AsyncJobManagerImpl]
(Job-Executor-2:job-84 = [ 538f1c49-f0fc-425c-a1c8-f2216cfad797 ])
Unexpected exception while executing
org.apache.cloudstack.api.command.user.vmsnapshot.CreateVMSnapshotCmd
com.cloud.utils.exception.CloudRuntimeException:
com.cloud.agent.api.UnsupportedAnswer cannot be cast to
com.cloud.agent.api.CreateVMSnapshotAnswer
at
com.cloud.vm.snapshot.VMSnapshotManagerImpl.createVmSnapshotInternal(VMSnapshotManagerImpl.java:406)
