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Posted to issues@cloudstack.apache.org by "Min Chen (JIRA)" <ji...@apache.org> on 2014/02/03 23:27:14 UTC
[jira] [Resolved] (CLOUDSTACK-6017) NPE while creating snapshot
multiple times on same Root volume with S3 as secondary storage
[ https://issues.apache.org/jira/browse/CLOUDSTACK-6017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Min Chen resolved CLOUDSTACK-6017.
----------------------------------
Resolution: Fixed
This bug was introduced by commit 3964a566f7e6bf5db837973b2f065796764d2269 from Sanjay. From log, we can see second snapshot (without any root volume change) command returned from ssvm does not have physical size returned, but our MS code does not consider this case, which caused this NPE. It seems that this is only a regression introduced in 4.3. Also this is specific to delta snapshot when S3 is used as secondary storage.
> NPE while creating snapshot multiple times on same Root volume with S3 as secondary storage
> -------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-6017
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-6017
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the default.)
> Components: Storage Controller
> Affects Versions: 4.3.0
> Reporter: Min Chen
> Assignee: Min Chen
> Priority: Critical
> Fix For: 4.3.0
>
>
> Steps:
> 1. Have Cs 4.3 with Xen 6.0.2 HV and NFS secondary storage
> 2. Create some VMs.
> 3. Now take snapshot of root volume of any VM. Take snapshot of same root volume again.
> Taking multiple snapshot is throwing NPE and snapshots are left in creating state in S3
> mysql> select store_id,state,snapshot_id,volume_id,store_role,parent_snapshot_id,install_path from snapshot_store_ref;
> +----------+-----------+-------------+-----------+------------+--------------------+---------------------------------------------------------+
> | store_id | state | snapshot_id | volume_id | store_role | parent_snapshot_id | install_path |
> +----------+-----------+-------------+-----------+------------+--------------------+---------------------------------------------------------+
> | 1 | Destroyed | 1 | 47 | Primary | 0 | c9111f41-07a4-474b-b2eb-af6c22faea46 |
> | 1 | Ready | 2 | 3 | Primary | 0 | d7adc16a-53b4-40d8-8f94-c83dc4e8666d |
> | 4 | Ready | 2 | 3 | Image | 0 | snapshots/2/3/a19ab602-f994-437b-801b-1e1ead2d38a7.vhd |
> | 1 | Ready | 3 | 3 | Primary | 2 | 899c7661-e7ce-4526-9e9f-efbdcf92e2f3 |
> | 4 | Creating | 3 | 3 | Image | 2 | snapshots/2/3 |
> | 1 | Ready | 4 | 3 | Primary | 3 | a1b7c4b3-4afd-4106-b786-64e35547c2ab |
> | 4 | Creating | 4 | 3 | Image | 2 | snapshots/2/3 |
> | 1 | Ready | 5 | 48 | Primary | 0 | 69238dbf-6a6d-4db2-a83f-6e346f62ba88 |
> | 4 | Ready | 5 | 48 | Image | 0 | snapshots/2/48/244cdf97-f5be-42f1-9113-d84a14469fca.vhd |
> | 1 | Ready | 6 | 48 | Primary | 5 | 05751419-aea2-48b5-879c-5f4c3920d1a4 |
> | 4 | Creating | 6 | 48 | Image | 5 | snapshots/2/48 |
> +----------+-----------+-------------+-----------+------------+--------------------+---------------------------------------------------------+
> 11 rows in set (0.00 sec)
> Snippet from Ms log:
> 2014-01-29 20:56:22,118 DEBUG [c.c.a.t.Request] (Job-Executor-30:ctx-8234dd77 ctx-cc2ffe07) Seq 5-961414397: Sending { Cmd , MgmtId: 7494415941730, via: 5(s-45-VM), Ver: v1, Flags: 100011, [{"org.apache.cloudstack.storage.command.DeleteCommand":{"data":{"org.apache.cloudstack.storage.to.SnapshotObjectTO":{"path":"snapshots/2/48","volume":{"uuid":"431e3823-7c28-4c69-84a5-bcb6c558c395","volumeType":"ROOT","dataStore":{"org.apache.cloudstack.storage.to.PrimaryDataStoreTO":{"uuid":"c040ab5c-6f99-3d0b-9377-dcf76c5798de","id":1,"poolType":"NetworkFilesystem","host":"10.147.28.7","path":"/export/home/manasa/primaryxen","port":2049,"url":"NetworkFilesystem://10.147.28.7//export/home/manasa/primaryxen/?ROLE=Primary&STOREUUID=c040ab5c-6f99-3d0b-9377-dcf76c5798de"}},"name":"ROOT-47","size":21474836480,"path":"37eaaa92-e99b-45b8-87dc-81a4e7c5f6ae","volumeId":48,"vmName":"i-2-47-VM","accountId":2,"format":"VHD","id":48,"deviceId":0,"hypervisorType":"XenServer"},"dataStore":{"com.cloud.agent.api.to.NfsTO":{"_url":"nfs://10.147.28.7/export/home/manasa/secondaryxen","_role":"ImageCache"}},"vmName":"i-2-47-VM","name":"VM-853bc152-2721-4c80-9c4c-afff916b9468_ROOT-47_20140129152615","hypervisorType":"XenServer","id":6,"quiescevm":false,"physicalSize":0}},"wait":0}}] }
> 2014-01-29 20:56:22,213 DEBUG [c.c.a.t.Request] (AgentManager-Handler-7:null) Seq 5-961414397: Processing: { Ans: , MgmtId: 7494415941730, via: 5, Ver: v1, Flags: 10, [{"com.cloud.agent.api.Answer":{"result":true,"wait":0}}] }
> 2014-01-29 20:56:22,214 DEBUG [c.c.a.t.Request] (Job-Executor-30:ctx-8234dd77 ctx-cc2ffe07) Seq 5-961414397: Received: { Ans: , MgmtId: 7494415941730, via: 5, Ver: v1, Flags: 10, { Answer } }
> 2014-01-29 20:56:22,232 DEBUG [o.a.c.s.s.SnapshotServiceImpl] (Job-Executor-30:ctx-8234dd77 ctx-cc2ffe07) Failed to update snapshot state
> java.lang.NullPointerException
> at org.apache.cloudstack.storage.snapshot.SnapshotObject.processEvent(SnapshotObject.java:291)
> at org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.copySnapshotAsyncCallback(SnapshotServiceImpl.java:331)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at org.apache.cloudstack.framework.async.AsyncCallbackDispatcher.dispatch(AsyncCallbackDispatcher.java:144)
> at org.apache.cloudstack.framework.async.InplaceAsyncCallbackDriver.performCompletionCallback(InplaceAsyncCallbackDriver.java:26)
> at org.apache.cloudstack.framework.async.AsyncCallbackDispatcher.complete(AsyncCallbackDispatcher.java:122)
> at org.apache.cloudstack.storage.motion.AncientDataMotionStrategy.copyAsync(AncientDataMotionStrategy.java:440)
> at org.apache.cloudstack.storage.motion.DataMotionServiceImpl.copyAsync(DataMotionServiceImpl.java:70)
> at org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.backupSnapshot(SnapshotServiceImpl.java:277)
> at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.backupSnapshot(XenserverSnapshotStrategy.java:142)
> at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.takeSnapshot(XenserverSnapshotStrategy.java:301)
> at com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:945)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
> at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
> at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> at $Proxy160.takeSnapshot(Unknown Source)
> at org.apache.cloudstack.storage.volume.VolumeServiceImpl.takeSnapshot(VolumeServiceImpl.java:1373)
> at com.cloud.storage.VolumeApiServiceImpl.orchestrateTakeVolumeSnapshot(VolumeApiServiceImpl.java:1783)
> at com.cloud.storage.VolumeApiServiceImpl.takeSnapshot(VolumeApiServiceImpl.java:1724)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
> at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
> at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> at $Proxy196.takeSnapshot(Unknown Source)
> at org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd.execute(CreateSnapshotCmd.java:181)
> at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:161)
> at com.cloud.api.ApiAsyncJobDispatcher.runJobInContext(ApiAsyncJobDispatcher.java:109)
> at com.cloud.api.ApiAsyncJobDispatcher$1.run(ApiAsyncJobDispatcher.java:66)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
> at com.cloud.api.ApiAsyncJobDispatcher.runJob(ApiAsyncJobDispatcher.java:63)
> at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.runInContext(AsyncJobManagerImpl.java:509)
> at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
> at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:679)
> 2014-01-29 20:56:22,235 DEBUG [c.c.s.s.SnapshotManagerImpl] (Job-Executor-30:ctx-8234dd77 ctx-cc2ffe07) Failed to create snapshot
> com.cloud.utils.exception.CloudRuntimeException: java.lang.NullPointerException
> at org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.backupSnapshot(SnapshotServiceImpl.java:292)
> at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.backupSnapshot(XenserverSnapshotStrategy.java:142)
> at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.takeSnapshot(XenserverSnapshotStrategy.java:301)
> at com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:945)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
> at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
> at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> at $Proxy160.takeSnapshot(Unknown Source)
> at org.apache.cloudstack.storage.volume.VolumeServiceImpl.takeSnapshot(VolumeServiceImpl.java:1373)
> at com.cloud.storage.VolumeApiServiceImpl.orchestrateTakeVolumeSnapshot(VolumeApiServiceImpl.java:1783)
> at com.cloud.storage.VolumeApiServiceImpl.takeSnapshot(VolumeApiServiceImpl.java:1724)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
> at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
> at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> at $Proxy196.takeSnapshot(Unknown Source)
> at org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd.execute(CreateSnapshotCmd.java:181)
> at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:161)
> at com.cloud.api.ApiAsyncJobDispatcher.runJobInContext(ApiAsyncJobDispatcher.java:109)
> at com.cloud.api.ApiAsyncJobDispatcher$1.run(ApiAsyncJobDispatcher.java:66)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
> at com.cloud.api.ApiAsyncJobDispatcher.runJob(ApiAsyncJobDispatcher.java:63)
> at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.runInContext(AsyncJobManagerImpl.java:509)
> at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
> at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:679)
> 2014-01-29 20:56:22,264 DEBUG [o.a.c.s.v.VolumeServiceImpl] (Job-Executor-30:ctx-8234dd77 ctx-cc2ffe07) Take snapshot: 48 failed
> com.cloud.utils.exception.CloudRuntimeException: Failed to create snapshot
> at com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:963)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
> at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
> at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> at $Proxy160.takeSnapshot(Unknown Source)
> at org.apache.cloudstack.storage.volume.VolumeServiceImpl.takeSnapshot(VolumeServiceImpl.java:1373)
> at com.cloud.storage.VolumeApiServiceImpl.orchestrateTakeVolumeSnapshot(VolumeApiServiceImpl.java:1783)
> at com.cloud.storage.VolumeApiServiceImpl.takeSnapshot(VolumeApiServiceImpl.java:1724)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:616)
> at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
> at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
> at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
> at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> at $Proxy196.takeSnapshot(Unknown Source)
> at org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd.execute(CreateSnapshotCmd.java:181)
> at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:161)
> at com.cloud.api.ApiAsyncJobDispatcher.runJobInContext(ApiAsyncJobDispatcher.java:109)
> at com.cloud.api.ApiAsyncJobDispatcher$1.run(ApiAsyncJobDispatcher.java:66)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
> at com.cloud.api.ApiAsyncJobDispatcher.runJob(ApiAsyncJobDispatcher.java:63)
> at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.runInContext(AsyncJobManagerImpl.java:509)
> at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:49)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
> at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
> at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:46)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
> at java.util.concurrent.FutureTask.run(FutureTask.java:166)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:679)
> Caused by: com.cloud.utils.exception.CloudRuntimeException: java.lang.NullPointerException
> at org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.backupSnapshot(SnapshotServiceImpl.java:292)
> at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.backupSnapshot(XenserverSnapshotStrategy.java:142)
> at org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.takeSnapshot(XenserverSnapshotStrategy.java:301)
> at com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:945)
> ... 45 more
> 2014-01-29 20:56:22,266 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (Job-Executor-30:ctx-8234dd77) Complete async job-84, jobStatus: FAILED, resultCode: 530, result: org.apache.cloudstack.api.response.ExceptionResponse/null/{"uuidList":[],"errorcode":530,"errortext":"Failed to create snapshot due to an internal error creating snapshot for volume 48"}
> 2014-01-29 20:56:22,292 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (Job-Executor-30:ctx-8234dd77) Done executing org.apache.cloudstack.api.command.user.snapshot.CreateSnapshotCmd for job-84
>
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