The OS is CentOS 6.5, Storage is NFS not hosted on the controller. I will also note that there is two zones, with the same configuration just using different NFS devices one zone can take snapshots but the one that can no longer take them has been working for 8 months with no issues.
Here is the section from the log file when I try to take a snapshot: 2014-11-26 07:00:48,308 DEBUG [cloud.api.ApiServlet] (catalina-exec-4:null) ===START=== 172.16.28.20 -- GET command=createSnapshot&volumeid=ec6460c4-896c-46d1-8ae5-75d6431a6608&response=json&sessionkey=ysbTjq7whHzoePtvcRBRSzsJ6zw%3D&_=1417014045703 2014-11-26 07:00:48,362 DEBUG [cloud.async.AsyncJobManagerImpl] (catalina-exec-4:null) submit async job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ], details: AsyncJobVO {id:147, userId: 2, accountId: 2, sessionKey: null, instanceType: Snapshot, instanceId: 128, cmd: org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd, cmdOriginator: null, cmdInfo: {"id":"128","response":"json","sessionkey":"ysbTjq7whHzoePtvcRBRSzsJ6zw\u003d","cmdEventType":"SNAPSHOT.CREATE","ctxUserId":"2","httpmethod":"GET","_":"1417014045703","volumeid":"ec6460c4-896c-46d1-8ae5-75d6431a6608","ctxAccountId":"2","ctxStartEventId":"5425"}, cmdVersion: 0, callbackType: 0, callbackAddress: null, status: 0, processStatus: 0, resultCode: 0, result: null, initMsid: 345048644703, completeMsid: null, lastUpdated: null, lastPolled: null, created: null} 2014-11-26 07:00:48,363 DEBUG [cloud.async.AsyncJobManagerImpl] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Executing org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd for job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ] 2014-11-26 07:00:48,363 DEBUG [cloud.api.ApiServlet] (catalina-exec-4:null) ===END=== 172.16.28.20 -- GET command=createSnapshot&volumeid=ec6460c4-896c-46d1-8ae5-75d6431a6608&response=json&sessionkey=ysbTjq7whHzoePtvcRBRSzsJ6zw%3D&_=1417014045703 2014-11-26 07:00:48,386 INFO [user.snapshot.CreateSnapshotCmd] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) VOLSS: createSnapshotCmd starts:1417014048386 2014-11-26 07:00:48,437 DEBUG [agent.transport.Request] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Seq 7-1985284483: Sending { Cmd , MgmtId: 345048644703, via: 7, Ver: v1, Flags: 100011, [{"org.apache.cloudstack.storage.command.CreateObjectCommand":{"data":{"org.apache.cloudstack.storage.to.SnapshotObjectTO":{"volume":{"uuid":"ec6460c4-896c-46d1-8ae5-75d6431a6608","volumeType":"ROOT","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"055b61d2-5260-3856-92fc-48facf5dfbaf","id":2,"poolType":"VMFS","host":"VMFS datastore: /Labs/CS-PRI-02","path":"/Labs/CS-PRI-02","port":0}},"name":"ROOT-297","size":21474836480,"path":"ROOT-297-000001","volumeId":334,"vmName":"i-2-297-VM","accountId":2,"chainInfo":"{\"diskDeviceBusName\":\"ide0:1\",\"diskChain\":[\"[CS-PRI-02] i-2-297-VM/ROOT-297.vmdk\"]}","format":"OVA","id":334,"hypervisorType":"VMware"},"parentSnapshotPath":"2e7af1a5-a31c-4fe6-b2f7-21965c1a86b9","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"055b61d2-5260-3856-92fc-48facf5dfbaf","id":2,"poolType":"VMFS","host":"VMFS datastore: /Labs/CS-PRI-02","path":"/Labs/CS-PRI-02","port":0}},"vmName":"i-2-297-VM","name":"new-import_ROOT-297_20141126150048","hypervisorType":"VMware","id":128}},"wait":0}}] } 2014-11-26 07:00:48,438 DEBUG [agent.transport.Request] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Seq 7-1985284483: Executing: { Cmd , MgmtId: 345048644703, via: 7, Ver: v1, Flags: 100011, [{"org.apache.cloudstack.storage.command.CreateObjectCommand":{"data":{"org.apache.cloudstack.storage.to.SnapshotObjectTO":{"volume":{"uuid":"ec6460c4-896c-46d1-8ae5-75d6431a6608","volumeType":"ROOT","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"055b61d2-5260-3856-92fc-48facf5dfbaf","id":2,"poolType":"VMFS","host":"VMFS datastore: /Labs/CS-PRI-02","path":"/Labs/CS-PRI-02","port":0}},"name":"ROOT-297","size":21474836480,"path":"ROOT-297-000001","volumeId":334,"vmName":"i-2-297-VM","accountId":2,"chainInfo":"{\"diskDeviceBusName\":\"ide0:1\",\"diskChain\":[\"[CS-PRI-02] i-2-297-VM/ROOT-297.vmdk\"]}","format":"OVA","id":334,"hypervisorType":"VMware"},"parentSnapshotPath":"2e7af1a5-a31c-4fe6-b2f7-21965c1a86b9","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"055b61d2-5260-3856-92fc-48facf5dfbaf","id":2,"poolType":"VMFS","host":"VMFS datastore: /Labs/CS-PRI-02","path":"/Labs/CS-PRI-02","port":0}},"vmName":"i-2-297-VM","name":"new-import_ROOT-297_20141126150048","hypervisorType":"VMware","id":128}},"wait":0}}] } 2014-11-26 07:00:48,438 DEBUG [agent.manager.DirectAgentAttache] (DirectAgent-311:null) Seq 7-1985284483: Executing request 2014-11-26 07:00:48,438 DEBUG [agent.manager.DirectAgentAttache] (DirectAgent-311:null) Seq 7-1985284483: Response Received: 2014-11-26 07:00:48,438 DEBUG [agent.transport.Request] (DirectAgent-311:null) Seq 7-1985284483: Processing: { Ans: , MgmtId: 345048644703, via: 7, Ver: v1, Flags: 10, [{"org.apache.cloudstack.storage.command.CreateObjectAnswer":{"data":{"org.apache.cloudstack.storage.to.SnapshotObjectTO":{"path":"b7c08601-0654-4749-b7e0-ccc380458e3d","id":0}},"result":true,"wait":0}}] } 2014-11-26 07:00:48,438 DEBUG [agent.transport.Request] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Seq 7-1985284483: Received: { Ans: , MgmtId: 345048644703, via: 7, Ver: v1, Flags: 10, { CreateObjectAnswer } } 2014-11-26 07:00:48,488 DEBUG [storage.motion.AncientDataMotionStrategy] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) copyAsync inspecting src type SNAPSHOT copyAsync inspecting dest type SNAPSHOT 2014-11-26 07:00:48,535 DEBUG [agent.transport.Request] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Seq 9-1742209940: Sending { Cmd , MgmtId: 345048644703, via: 9, Ver: v1, Flags: 100111, [{"org.apache.cloudstack.storage.command.CopyCommand":{"srcTO":{"org.apache.cloudstack.storage.to.SnapshotObjectTO":{"path":"b7c08601-0654-4749-b7e0-ccc380458e3d","volume":{"uuid":"ec6460c4-896c-46d1-8ae5-75d6431a6608","volumeType":"ROOT","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"055b61d2-5260-3856-92fc-48facf5dfbaf","id":2,"poolType":"VMFS","host":"VMFS datastore: /Labs/CS-PRI-02","path":"/Labs/CS-PRI-02","port":0}},"name":"ROOT-297","size":21474836480,"path":"ROOT-297-000001","volumeId":334,"vmName":"i-2-297-VM","accountId":2,"chainInfo":"{\"diskDeviceBusName\":\"ide0:1\",\"diskChain\":[\"[CS-PRI-02] i-2-297-VM/ROOT-297.vmdk\"]}","format":"OVA","id":334,"hypervisorType":"VMware"},"parentSnapshotPath":"2e7af1a5-a31c-4fe6-b2f7-21965c1a86b9","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"055b61d2-5260-3856-92fc-48facf5dfbaf","id":2,"poolType":"VMFS","host":"VMFS datastore: /Labs/CS-PRI-02","path":"/Labs/CS-PRI-02","port":0}},"vmName":"i-2-297-VM","name":"new-import_ROOT-297_20141126150048","hypervisorType":"VMware","id":128}},"destTO":{"org.apache.cloudstack.storage.to.SnapshotObjectTO":{"path":"snapshots/2/334","volume":{"uuid":"ec6460c4-896c-46d1-8ae5-75d6431a6608","volumeType":"ROOT","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"055b61d2-5260-3856-92fc-48facf5dfbaf","id":2,"poolType":"VMFS","host":"VMFS datastore: /Labs/CS-PRI-02","path":"/Labs/CS-PRI-02","port":0}},"name":"ROOT-297","size":21474836480,"path":"ROOT-297-000001","volumeId":334,"vmName":"i-2-297-VM","accountId":2,"chainInfo":"{\"diskDeviceBusName\":\"ide0:1\",\"diskChain\":[\"[CS-PRI-02] i-2-297-VM/ROOT-297.vmdk\"]}","format":"OVA","id":334,"hypervisorType":"VMware"},"dataStore":{"com.cloud.agent.api.to.NfsTO":{"_url":"nfs://172.16.25.84/data/CloudStackSEC2","_role":"Image"}},"vmName":"i-2-297-VM","name":"new-import_ROOT-297_20141126150048","hypervisorType":"VMware","id":128}},"executeInSequence":true,"wait":21600}}] } 2014-11-26 07:00:51,404 DEBUG [cloud.api.ApiServlet] (catalina-exec-25:null) ===START=== 172.16.28.20 -- GET command=queryAsyncJobResult&jobId=2007bb4e-03c9-4ff7-874d-e50641318ace&response=json&sessionkey=ysbTjq7whHzoePtvcRBRSzsJ6zw%3D&_=1417014048864 2014-11-26 07:00:51,428 DEBUG [cloud.api.ApiServlet] (catalina-exec-25:null) ===END=== 172.16.28.20 -- GET command=queryAsyncJobResult&jobId=2007bb4e-03c9-4ff7-874d-e50641318ace&response=json&sessionkey=ysbTjq7whHzoePtvcRBRSzsJ6zw%3D&_=1417014048864 2014-11-26 07:00:51,840 DEBUG [agent.manager.AgentManagerImpl] (AgentManager-Handler-2:null) SeqA 3-1302876: Processing Seq 3-1302876: { Cmd , MgmtId: -1, via: 3, Ver: v1, Flags: 11, [{"com.cloud.agent.api.ConsoleProxyLoadReportCommand":{"_proxyVmId":2,"_loadInfo":"{\n \"connections\": []\n}","wait":0}}] } 2014-11-26 07:00:51,846 DEBUG [agent.manager.AgentManagerImpl] (AgentManager-Handler-2:null) SeqA 3-1302876: Sending Seq 3-1302876: { Ans: , MgmtId: 345048644703, via: 3, Ver: v1, Flags: 100010, [{"com.cloud.agent.api.AgentControlAnswer":{"result":true,"wait":0}}] } 2014-11-26 07:00:52,150 DEBUG [agent.transport.Request] (AgentManager-Handler-15:null) Seq 9-1742209940: Processing: { Ans: , MgmtId: 345048644703, via: 9, Ver: v1, Flags: 110, [{"org.apache.cloudstack.storage.command.CopyCmdAnswer":{"result":false,"details":"backup snapshot exception: Exception: java.lang.Exception\nMessage: unable to prepare snapshot backup directory\n","wait":0}}] } 2014-11-26 07:00:52,150 DEBUG [agent.transport.Request] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Seq 9-1742209940: Received: { Ans: , MgmtId: 345048644703, via: 9, Ver: v1, Flags: 110, { CopyCmdAnswer } } 2014-11-26 07:00:52,155 DEBUG [agent.manager.AgentAttache] (AgentManager-Handler-15:null) Seq 9-1742209940: No more commands found 2014-11-26 07:00:52,171 DEBUG [storage.snapshot.SnapshotManagerImpl] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Failed to create snapshot com.cloud.utils.exception.CloudRuntimeException: backup snapshot exception: Exception: java.lang.Exception Message: unable to prepare snapshot backup directory at org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.backupSnapshot(SnapshotServiceImpl.java:280) at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.backupSnapshot(XenserverSnapshotStrategy.java:136) at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.takeSnapshot(XenserverSnapshotStrategy.java:279) at com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:1007) at com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) at org.apache.cloudstack.storage.volume.VolumeServiceImpl.takeSnapshot(VolumeServiceImpl.java:1311) at com.cloud.storage.VolumeManagerImpl.takeSnapshot(VolumeManagerImpl.java:2773) at org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd.execute(CreateSnapshotCmd.java:170) at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:158) at com.cloud.async.AsyncJobManagerImpl$1.run(AsyncJobManagerImpl.java:531) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) 2014-11-26 07:00:52,184 DEBUG [storage.volume.VolumeServiceImpl] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Take snapshot: 334 failed com.cloud.utils.exception.CloudRuntimeException: Failed to create snapshot at com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:1034) at com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) at org.apache.cloudstack.storage.volume.VolumeServiceImpl.takeSnapshot(VolumeServiceImpl.java:1311) at com.cloud.storage.VolumeManagerImpl.takeSnapshot(VolumeManagerImpl.java:2773) at org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd.execute(CreateSnapshotCmd.java:170) at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:158) at com.cloud.async.AsyncJobManagerImpl$1.run(AsyncJobManagerImpl.java:531) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: com.cloud.utils.exception.CloudRuntimeException: backup snapshot exception: Exception: java.lang.Exception Message: unable to prepare snapshot backup directory at org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.backupSnapshot(SnapshotServiceImpl.java:280) at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.backupSnapshot(XenserverSnapshotStrategy.java:136) at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.takeSnapshot(XenserverSnapshotStrategy.java:279) at com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:1007) ... 15 more 2014-11-26 07:00:52,184 DEBUG [user.snapshot.CreateSnapshotCmd] (Job-Executor-65:job-147 = [ 2007bb4e-03c9-4ff7-874d-e50641318ace ]) Failed to create snapshot org.apache.cloudstack.api.ServerApiException at org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd.execute(CreateSnapshotCmd.java:176) at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:158) at com.cloud.async.AsyncJobManagerImpl$1.run(AsyncJobManagerImpl.java:531) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) -----Original Message----- From: Andrija Panic [mailto:andrija.pa...@gmail.com] Sent: Tuesday, November 25, 2014 11:55 PM To: users@cloudstack.apache.org Subject: Re: Unable to take Snapshot CS 4.2.1 Please attach the management logs for further invetigation...what OS, what storage, etc... On 26 November 2014 at 01:51, Jeff Barnett <jbarn...@prokarma.com> wrote: > When I try to take a snapshot now I just get an error like this, > Failed to create a snapshot due to an internal error creating snapshot for > volume ... > has anyone run into this, if so what was the fix, I tried restarting > the cloud services on the SSVM, but that did not help. > > > > -- Andrija Panić