2018-08-13T07:29:52,155 | ERROR | opendaylight-cluster-data-notification-dispatcher-76 | UpgradeUtils                     | 266 - org.opendaylight.genius.mdsalutil-impl - 0.4.4 | Unable to update UpgradeState
java.util.concurrent.ExecutionException: OptimisticLockFailedException{message=Optimistic lock failed for path /(urn:opendaylight:serviceutils:upgrade?revision=2018-07-02)upgrade-config, errorList=[RpcError [message=Optimistic lock failed for path /(urn:opendaylight:serviceutils:upgrade?revision=2018-07-02)upgrade-config, severity=ERROR, errorType=APPLICATION, tag=resource-denied, applicationTag=null, info=null, cause=org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException: Node was replaced by other transaction.]]}
Caused by: org.opendaylight.controller.md.sal.common.api.data.OptimisticLockFailedException: Optimistic lock failed for path /(urn:opendaylight:serviceutils:upgrade?revision=2018-07-02)upgrade-config
Caused by: org.opendaylight.yangtools.yang.data.api.schema.tree.ConflictingModificationAppliedException: Node was replaced by other transaction.