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Posted to users@cloudstack.apache.org by Bjoern Teipel <bj...@internetbrands.com> on 2013/10/19 02:23:27 UTC

4.2.0: KVM snapshorts are not working

Does anyone tried creating disk snapshots on KVM and it fails, although 
the qcow files got created.
Filed CLOUDSTACK-4878 just to be sure

2013-10-15 21:45:59,415 DEBUG [agent.transport.Request] 
(AgentManager-Handler-8:null) Seq 1-621806172: Processing: { Ans: , 
MgmtId: 110493122496, via: 1, Ver: v1, Flags: 110, 
[{"org.apache.cloudstack.storage.command.CopyCmdAnswer":{"newData":{"org.apache.cloudstack.storage.to.SnapshotObjectTO":{"path":"snapshots/4/5/57ef69cd-1bc8-4e47-94c1-84834befaaad","id":0}},"result":true,"wait":0}}] 
}
2013-10-15 21:45:59,415 DEBUG [agent.manager.AgentAttache] 
(AgentManager-Handler-8:null) Seq 1-621806172: No more commands found
2013-10-15 21:45:59,415 DEBUG [agent.transport.Request] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) Seq 
1-621806172: Received: { Ans: , MgmtId: 110493122496, via: 1, Ver: v1, 
Flags: 110, { CopyCmdAnswer } }
2013-10-15 21:45:59,417 DEBUG [storage.snapshot.SnapshotServiceImpl] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) 
Failed to update snapshot state
com.cloud.utils.exception.CloudRuntimeException: DB Exception on: 
com.mysql.jdbc.JDBC4PreparedStatement@79fd21d8: SELECT 
snapshot_store_ref.id, snapshot_store_ref.store_id, 
snapshot_store_ref.store_role, snapshot_store_ref.snapshot_id, 
snapshot_store_ref.created, snapshot_store_ref.last_updated, 
snapshot_store_ref.size, snapshot_store_ref.physical_size, 
snapshot_store_ref.parent_snapshot_id, snapshot_store_ref.job_id, 
snapshot_store_ref.install_path, snapshot_store_ref.update_count, 
snapshot_store_ref.updated, snapshot_store_ref.state, 
snapshot_store_ref.ref_cnt, snapshot_store_ref.volume_id FROM 
snapshot_store_ref WHERE snapshot_store_ref.snapshot_id = 1 AND 
snapshot_store_ref.store_id = 1 AND snapshot_store_ref.store_role = 
'Image' ORDER BY RAND() LIMIT 1
         at 
com.cloud.utils.db.GenericDaoBase.searchIncludingRemoved(GenericDaoBase.java:414) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.utils.db.GenericDaoBase.searchIncludingRemoved(GenericDaoBase.java:349) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.utils.db.GenericDaoBase.findOneIncludingRemovedBy(GenericDaoBase.java:859) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.utils.db.GenericDaoBase.findOneBy(GenericDaoBase.java:870)
         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
org.apache.cloudstack.storage.image.db.SnapshotDataStoreDaoImpl.findByStoreSnapshot(SnapshotDataStoreDaoImpl.java:178) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
org.apache.cloudstack.storage.snapshot.SnapshotObject.processEvent(SnapshotObject.java:253) 

         at 
org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.copySnapshotAsyncCallback(SnapshotServiceImpl.java:315) 

         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:142) 

         at 
org.apache.cloudstack.framework.async.InplaceAsyncCallbackDriver.performCompletionCallback(InplaceAsyncCallbackDriver.java:26) 

         at 
org.apache.cloudstack.framework.async.AsyncCallbackDispatcher.complete(AsyncCallbackDispatcher.java:120) 

         at 
org.apache.cloudstack.storage.motion.AncientDataMotionStrategy.copyAsync(AncientDataMotionStrategy.java:423) 

         at 
org.apache.cloudstack.storage.motion.DataMotionServiceImpl.copyAsync(DataMotionServiceImpl.java:55) 

         at 
org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.backupSnapshot(SnapshotServiceImpl.java:265) 

         at 
org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.backupSnapshot(XenserverSnapshotStrategy.java:138) 

         at 
org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.takeSnapshot(XenserverSnapshotStrategy.java:264) 

         at 
com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:1013) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
org.apache.cloudstack.storage.volume.VolumeServiceImpl.takeSnapshot(VolumeServiceImpl.java:1307) 

         at 
com.cloud.storage.VolumeManagerImpl.takeSnapshot(VolumeManagerImpl.java:2719) 

         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$Sync.innerRun(FutureTask.java:334)
         at java.util.concurrent.FutureTask.run(FutureTask.java:166)
         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:679)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 
Communications link failure

The last packet successfully received from the server was 42,750 
milliseconds ago. The last packet sent successfully to the server was 0 
milliseconds ago.
         at 
sun.reflect.GeneratedConstructorAccessor174.newInstance(Unknown Source)
         at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 

         at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
         at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
         at 
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
         at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3567)
         at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3456)
         at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3997)
         at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2468)
         at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2629)
         at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2719)
         at 
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155) 

         at 
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2318)
         at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96) 

         at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96) 

         at 
com.cloud.utils.db.GenericDaoBase.searchIncludingRemoved(GenericDaoBase.java:408) 

         ... 60 more
Caused by: java.io.EOFException: Can not read response from server. 
Expected to read 4 bytes, read 0 bytes before connection was 
unexpectedly lost.
         ... 75 more
2013-10-15 21:45:59,419 DEBUG [storage.snapshot.SnapshotManagerImpl] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) 
Failed to create snapshot
com.cloud.utils.exception.CloudRuntimeException: 
com.cloud.utils.exception.CloudRuntimeException: DB Exception on: 
com.mysql.jdbc.JDBC4PreparedStatement@79fd21d8: SELECT 
snapshot_store_ref.id, snapshot_store_ref.store_id, 
snapshot_store_ref.store_role, snapshot_store_ref.snapshot_id, 
snapshot_store_ref.created, snapshot_store_ref.last_updated, 
snapshot_store_ref.size, snapshot_store_ref.physical_size, 
snapshot_store_ref.parent_snapshot_id, snapshot_store_ref.job_id, 
snapshot_store_ref.install_path, snapshot_store_ref.update_count, 
snapshot_store_ref.updated, snapshot_store_ref.state, 
snapshot_store_ref.ref_cnt, snapshot_store_ref.volume_id FROM 
snapshot_store_ref WHERE snapshot_store_ref.snapshot_id = 1 AND 
snapshot_store_ref.store_id = 1 AND snapshot_store_ref.store_role = 
'Image' ORDER BY RAND() LIMIT 1
         at 
org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.backupSnapshot(SnapshotServiceImpl.java:280) 

         at 
org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.backupSnapshot(XenserverSnapshotStrategy.java:138) 

         at 
org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.takeSnapshot(XenserverSnapshotStrategy.java:264) 

         at 
com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:1013) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
org.apache.cloudstack.storage.volume.VolumeServiceImpl.takeSnapshot(VolumeServiceImpl.java:1307) 

         at 
com.cloud.storage.VolumeManagerImpl.takeSnapshot(VolumeManagerImpl.java:2719) 

         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$Sync.innerRun(FutureTask.java:334)
         at java.util.concurrent.FutureTask.run(FutureTask.java:166)
         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:679)
2013-10-15 21:45:59,420 WARN [db.Transaction.Transaction] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) 
Unable to set auto commit:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications 
link failure

The last packet successfully received from the server was 42,754 
milliseconds ago. The last packet sent successfully to the server was 4 
milliseconds ago.
         at 
sun.reflect.GeneratedConstructorAccessor174.newInstance(Unknown Source)
         at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 

         at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
         at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
         at 
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
         at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3829)
         at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2449)
         at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2629)
         at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2713)
         at 
com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5060)
         at 
org.apache.commons.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:371) 

         at 
org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:328) 

         at com.cloud.utils.db.Transaction.start(Transaction.java:420)
         at 
com.cloud.resourcelimit.ResourceLimitManagerImpl.updateResourceCountForAccount(ResourceLimitManagerImpl.java:722) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.resourcelimit.ResourceLimitManagerImpl.decrementResourceCount(ResourceLimitManagerImpl.java:253) 

         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:1307) 

         at 
com.cloud.storage.VolumeManagerImpl.takeSnapshot(VolumeManagerImpl.java:2719) 

         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$Sync.innerRun(FutureTask.java:334)
         at java.util.concurrent.FutureTask.run(FutureTask.java:166)
         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:679)
Caused by: java.net.SocketException: Broken pipe
         at java.net.SocketOutputStream.socketWrite0(Native Method)
         ... 36 more
2013-10-15 21:45:59,422 ERROR 
[cloud.resourcelimit.ResourceLimitManagerImpl] (Job-Executor-2:job-40 = 
[ 81b303ad-acb2-483f-9571-d09064d1d086 ]) Failed to update resource 
count for account id=4
2013-10-15 21:45:59,422 DEBUG [db.Transaction.Transaction] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) 
Rolling back the transaction: Time = 2 Name = 
-AsyncJobManagerImpl$1.run:494-Executors$RunnableAdapter.call:471-FutureTask$Sync.innerRun:334-FutureTask.run:166-ThreadPoolExecutor.runWorker:1146-ThreadPoolExecutor$Worker.run:615-Thread.run:679; 
called by 
-Transaction.rollback:898-Transaction.removeUpTo:841-Transaction.close:665-TransactionContextBuilder.interceptComplete:56-ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept:131-ResourceLimitManagerImpl.decrementResourceCount:253-SnapshotManagerImpl.takeSnapshot:1034-ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept:125-VolumeServiceImpl.takeSnapshot:1307-VolumeManagerImpl.takeSnapshot:2719-CreateSnapshotCmd.execute:170-ApiDispatcher.dispatch:158 

2013-10-15 21:45:59,423 WARN [db.Transaction.Transaction] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) 
Unable to rollback
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: 
Communications link failure during rollback(). Transaction resolution 
unknown.
         at 
sun.reflect.GeneratedConstructorAccessor188.newInstance(Unknown Source)
         at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 

         at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
         at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
         at com.mysql.jdbc.Util.getInstance(Util.java:386)
         at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1014)
         at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988)
         at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974)
         at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919)
         at 
com.mysql.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:4793)
         at 
org.apache.commons.dbcp.DelegatingConnection.rollback(DelegatingConnection.java:368) 

         at 
org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.rollback(PoolingDataSource.java:323) 

         at 
com.cloud.utils.db.Transaction.rollbackTransaction(Transaction.java:860)
         at com.cloud.utils.db.Transaction.rollback(Transaction.java:898)
         at com.cloud.utils.db.Transaction.removeUpTo(Transaction.java:841)
         at com.cloud.utils.db.Transaction.close(Transaction.java:665)
         at 
com.cloud.utils.db.TransactionContextBuilder.interceptComplete(TransactionContextBuilder.java:56) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:131) 

         at 
com.cloud.resourcelimit.ResourceLimitManagerImpl.decrementResourceCount(ResourceLimitManagerImpl.java:253) 

         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:1307) 

         at 
com.cloud.storage.VolumeManagerImpl.takeSnapshot(VolumeManagerImpl.java:2719) 

         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$Sync.innerRun(FutureTask.java:334)
         at java.util.concurrent.FutureTask.run(FutureTask.java:166)
         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:679)
2013-10-15 21:45:59,424 WARN [apache.cloudstack.alerts] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) 
alertType:: 22 // dataCenterId:: 0 // podId:: 0 // clusterId:: null // 
message:: Failed to decrement resource count of type secondary_storage 
for account id=4
2013-10-15 21:45:59,427 ERROR [cloud.alert.AlertManagerImpl] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) 
Problem sending email alert
com.cloud.utils.exception.CloudRuntimeException: DB Exception on: 
com.mysql.jdbc.JDBC4PreparedStatement@18608772: SELECT alert.id, 
alert.type, alert.cluster_id, alert.pod_id, alert.data_center_id, 
alert.subject, alert.sent_count, alert.created, alert.last_sent, 
alert.resolved, alert.uuid, alert.archived FROM alert WHERE alert.type = 
22 AND alert.data_center_id = 0 AND alert.archived = 0 AND alert.pod_id 
= 0 ORDER BY alert.created DESC LIMIT 0, 1
         at 
com.cloud.utils.db.GenericDaoBase.searchIncludingRemoved(GenericDaoBase.java:414) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.utils.db.GenericDaoBase.searchIncludingRemoved(GenericDaoBase.java:349) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.utils.db.GenericDaoBase.listIncludingRemovedBy(GenericDaoBase.java:901) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.utils.db.GenericDaoBase.listBy(GenericDaoBase.java:878)
         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.alert.dao.AlertDaoImpl.getLastAlert(AlertDaoImpl.java:66)
         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
com.cloud.alert.AlertManagerImpl$EmailAlert.sendAlert(AlertManagerImpl.java:833) 

         at 
com.cloud.alert.AlertManagerImpl.sendAlert(AlertManagerImpl.java:261)
         at 
com.cloud.resourcelimit.ResourceLimitManagerImpl.decrementResourceCount(ResourceLimitManagerImpl.java:254) 

         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:1307) 

         at 
com.cloud.storage.VolumeManagerImpl.takeSnapshot(VolumeManagerImpl.java:2719) 

         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$Sync.innerRun(FutureTask.java:334)
         at java.util.concurrent.FutureTask.run(FutureTask.java:166)
         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:679)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 
Communications link failure

The last packet successfully received from the server was 42,760 
milliseconds ago. The last packet sent successfully to the server was 10 
milliseconds ago.
         at 
sun.reflect.GeneratedConstructorAccessor174.newInstance(Unknown Source)
         at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 

         at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
         at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
         at 
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
         at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3829)
         at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2449)
         at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2629)
         at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2719)
         at 
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155) 

         at 
com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2318)
         at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96) 

         at 
org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:96) 

         at 
com.cloud.utils.db.GenericDaoBase.searchIncludingRemoved(GenericDaoBase.java:408) 

         ... 49 more
Caused by: java.net.SocketException: Broken pipe
         at java.net.SocketOutputStream.socketWrite0(Native Method)
         ... 62 more
2013-10-15 21:45:59,430 DEBUG [storage.volume.VolumeServiceImpl] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) Take 
snapshot: 5 failed
com.cloud.utils.exception.CloudRuntimeException: Failed to create snapshot
         at 
com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:1040) 

         at 
com.cloud.utils.component.ComponentInstantiationPostProcessor$InterceptorDispatcher.intercept(ComponentInstantiationPostProcessor.java:125) 

         at 
org.apache.cloudstack.storage.volume.VolumeServiceImpl.takeSnapshot(VolumeServiceImpl.java:1307) 

         at 
com.cloud.storage.VolumeManagerImpl.takeSnapshot(VolumeManagerImpl.java:2719) 

         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$Sync.innerRun(FutureTask.java:334)
         at java.util.concurrent.FutureTask.run(FutureTask.java:166)
         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:679)
Caused by: com.cloud.utils.exception.CloudRuntimeException: 
com.cloud.utils.exception.CloudRuntimeException: DB Exception on: 
com.mysql.jdbc.JDBC4PreparedStatement@79fd21d8: SELECT 
snapshot_store_ref.id, snapshot_store_ref.store_id, 
snapshot_store_ref.store_role, snapshot_store_ref.snapshot_id, 
snapshot_store_ref.created, snapshot_store_ref.last_updated, 
snapshot_store_ref.size, snapshot_store_ref.physical_size, 
snapshot_store_ref.parent_snapshot_id, snapshot_store_ref.job_id, 
snapshot_store_ref.install_path, snapshot_store_ref.update_count, 
snapshot_store_ref.updated, snapshot_store_ref.state, 
snapshot_store_ref.ref_cnt, snapshot_store_ref.volume_id FROM 
snapshot_store_ref WHERE snapshot_store_ref.snapshot_id = 1 AND 
snapshot_store_ref.store_id = 1 AND snapshot_store_ref.store_role = 
'Image' ORDER BY RAND() LIMIT 1
         at 
org.apache.cloudstack.storage.snapshot.SnapshotServiceImpl.backupSnapshot(SnapshotServiceImpl.java:280) 

         at 
org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.backupSnapshot(XenserverSnapshotStrategy.java:138) 

         at 
org.apache.cloudstack.storage.snapshot.XenserverSnapshotStrategy.takeSnapshot(XenserverSnapshotStrategy.java:264) 

         at 
com.cloud.storage.snapshot.SnapshotManagerImpl.takeSnapshot(SnapshotManagerImpl.java:1013) 

         ... 16 more
2013-10-15 21:45:59,437 DEBUG [cloud.async.AsyncJobManagerImpl] 
(Job-Executor-2:job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ]) 
Complete async job-40 = [ 81b303ad-acb2-483f-9571-d09064d1d086 ], 
jobStatus: 2, resultCode: 530, result: Error Code: 530 Error text: 
Failed to create snapshot due to an internal error creating snapshot for 
volume 5

SQL Content :

mysql> SELECT snapshot_store_ref.id, snapshot_store_ref.store_id, 
snapshot_store_ref.store_role, snapshot_store_ref.snapshot_id, 
snapshot_store_ref.created, snapshot_store_ref.last_updated, 
snapshot_store_ref.size, snapshot_store_ref.physical_size, 
snapshot_store_ref.parent_snapshot_id, snapshot_store_ref.job_id, 
snapshot_store_ref.install_path, snapshot_store_ref.update_count, 
snapshot_store_ref.updated, snapshot_store_ref.state, 
snapshot_store_ref.ref_cnt, snapshot_store_ref.volume_id FROM 
snapshot_store_ref WHERE snapshot_store_ref.snapshot_id = 1 AND 
snapshot_store_ref.store_id = 1 AND snapshot_store_ref.store_role = 
'Image' ORDER BY RAND() LIMIT 1\G
*************************** 1. row ***************************
                 id: 2
           store_id: 1
         store_role: Image
        snapshot_id: 1
            created: 2013-10-16 04:45:16
       last_updated: NULL
               size: 0
      physical_size: 0
parent_snapshot_id: 0
             job_id: NULL
       install_path: snapshots/4/5
       update_count: 1
            updated: 2013-10-16 04:45:16
              state: Creating
            ref_cnt: 0
          volume_id: 5


mysql> SELECT alert.id, alert.type, alert.cluster_id, alert.pod_id, 
alert.data_center_id, alert.subject, alert.sent_count, alert.created, 
alert.last_sent, alert.resolved, alert.uuid, alert.archived FROM alert 
WHERE alert.type = 22 AND alert.data_center_id = 0 AND alert.archived = 
0 AND alert.pod_id = 0 ORDER BY alert.created DESC LIMIT 0, 1\G
Empty set (0.00 sec)

Actually I can see a qcow2 snapshot file has been created. Not sure why 
command fails

  qemu-img info d1595fc0-8220-4d4f-99b9-d02759262bce
image: d1595fc0-8220-4d4f-99b9-d02759262bce
file format: qcow2
virtual size: 2.0G (2097152000 bytes)
disk size: 122M
cluster_size: 65536
backing file: 
/mnt/46ae9df0-3e29-3535-9acc-506dafa3f52c/d07390a2-edf9-4c6c-839c-2e03a4d3cd5c 



-- 

Bjoern Teipel
System Operation Manager UNIX
Internet Brands
909 N. Sepulveda Blvd., 11th Floor
El Segundo, CA 90245
P: (310) 280- 5287

bjoern.teipel@internetbrands.com