After rebooting engine storage is unable to connect ,below are the logs,

 status = finished
2015-11-20 17:54:36,865 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [24fd9594] Start SPM Task failed - result: cleanSuccess, message: VDSGenericException: VDSErrorException: Failed to HSMGetTaskStatusVDS, error = Cannot obtain lock, code = 651
2015-11-20 17:54:36,883 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [24fd9594] spmStart polling ended, spm status: Free
2015-11-20 17:54:36,898 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.HSMClearTaskVDSCommand] (DefaultQuartzScheduler_Worker-59) [24fd9594] START, HSMClearTaskVDSCommand(HostName = pbuovirt3, HostId = 2eabc525-c100-4b6e-8a0c-f4f6b0901bec, taskId=ec568c7e-44e3-4fcd-a353-85033ad3d721), log id: 484dc789
2015-11-20 17:54:36,904 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.HSMClearTaskVDSCommand] (DefaultQuartzScheduler_Worker-59) [24fd9594] FINISH, HSMClearTaskVDSCommand, log id: 484dc789
2015-11-20 17:54:36,905 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [24fd9594] FINISH, SpmStartVDSCommand, return: org.ovirt.engine.core.common.businessentities.SpmStatusResult@4123abbf, log id: 44e92a18
2015-11-20 17:54:36,910 INFO  [org.ovirt.engine.core.bll.storage.SetStoragePoolStatusCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] Running command: SetStoragePoolStatusCommand internal: true. Entities affected :  ID: 7816137d-e178-4998-9309-43e1c111ee1d Type: StoragePool
2015-11-20 17:54:36,929 ERROR [org.ovirt.engine.core.vdsbroker.irsbroker.IrsBrokerCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] IrsBroker::Failed::GetStoragePoolInfoVDS due to: IrsSpmStartFailedException: IRSGenericException: IRSErrorException: SpmStart failed
2015-11-20 17:54:36,998 INFO  [org.ovirt.engine.core.vdsbroker.irsbroker.IrsProxyData] (DefaultQuartzScheduler_Worker-59) [ce0aa02] Irs placed on server 2eabc525-c100-4b6e-8a0c-f4f6b0901bec failed. Proceed Failover
2015-11-20 17:54:37,077 INFO  [org.ovirt.engine.core.vdsbroker.irsbroker.IrsProxyData] (DefaultQuartzScheduler_Worker-59) [ce0aa02] hostFromVds::selectedVds - pbuovirt2, spmStatus Free, storage pool PBU
2015-11-20 17:54:37,096 INFO  [org.ovirt.engine.core.vdsbroker.irsbroker.IrsProxyData] (DefaultQuartzScheduler_Worker-59) [ce0aa02] SpmStatus on vds d6c25f14-b5af-4290-a59e-26ce669c6549: Free
2015-11-20 17:54:37,101 INFO  [org.ovirt.engine.core.vdsbroker.irsbroker.IrsProxyData] (DefaultQuartzScheduler_Worker-59) [ce0aa02] starting spm on vds pbuovirt2, storage pool PBU, prevId 3, LVER 25
2015-11-20 17:54:37,125 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] START, SpmStartVDSCommand(HostName = pbuovirt2, HostId = d6c25f14-b5af-4290-a59e-26ce669c6549, storagePoolId = 7816137d-e178-4998-9309-43e1c111ee1d, prevId=3, prevLVER=25, storagePoolFormatType=V3, recoveryMode=Manual, SCSIFencing=false), log id: 1376671f
2015-11-20 17:54:37,145 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] spmStart polling started: taskId = cb3041db-782b-45c4-b1ca-8887eba8c852
2015-11-20 17:54:38,151 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.HSMGetTaskStatusVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] Failed in HSMGetTaskStatusVDS method
2015-11-20 17:54:38,152 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] spmStart polling ended: taskId = cb3041db-782b-45c4-b1ca-8887eba8c852 task status = finished
2015-11-20 17:54:38,152 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] Start SPM Task failed - result: cleanSuccess, message: VDSGenericException: VDSErrorException: Failed to HSMGetTaskStatusVDS, error = Cannot obtain lock, code = 651
2015-11-20 17:54:38,172 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] spmStart polling ended, spm status: Free
2015-11-20 17:54:38,191 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.HSMClearTaskVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] START, HSMClearTaskVDSCommand(HostName = pbuovirt2, HostId = d6c25f14-b5af-4290-a59e-26ce669c6549, taskId=cb3041db-782b-45c4-b1ca-8887eba8c852), log id: 3970d6ee
2015-11-20 17:54:38,200 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.HSMClearTaskVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] FINISH, HSMClearTaskVDSCommand, log id: 3970d6ee
2015-11-20 17:54:38,201 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.SpmStartVDSCommand] (DefaultQuartzScheduler_Worker-59) [ce0aa02] FINISH, SpmStartVDSCommand, return: org.ovirt.engine.core.common.businessentities.SpmStatusResult@3334cb75, log id: 1376671f
2015-11-20 17:54:38,206 INFO  [org.ovirt.engine.core.bll.storage.SetStoragePoolStatusCommand] (DefaultQuartzScheduler_Worker-59) [4f198896] Running command: SetStoragePoolStatusCommand internal: true. Entities affected :  ID: 7816137d-e178-4998-9309-43e1c111ee1d Type: StoragePool
2015-11-20 17:54:38,233 ERROR [org.ovirt.engine.core.vdsbroker.irsbroker.IrsBrokerCommand] (DefaultQuartzScheduler_Worker-59) [4f198896] IrsBroker::Failed::GetStoragePoolInfoVDS due to: IrsSpmStartFailedException: IRSGenericException: IRSErrorException: SpmStart failed
^C
[root@pscloud ~]#