I am getting below errors in the logs. We have server1 and server2 (Fail over of server 1).
2015-02-24 13:42:31,727 ERROR [repo.sync.SyncTrackerComponent] Unable to pull node from target (tenant=ihg.com, ssdId=c70da591-056e-4b9c-a485-30918036ef94, targetNodeRef=workspace://SpacesStore/0ef5354b-0b73-47b7-a45d-bd543edbd2c2) java.lang.IllegalArgumentException: Invalid SyncNode, must have NodeRef or ParentNodeRef: SNCI[ssdId=c70da591-056e-4b9c-a485-30918036ef94, type={http://www.alfresco.org/model/content/1.0}content, localNodeRef=null, localParentNodeRef=null, remoteNodeRef=workspace://SpacesStore/0ef5354b-0b73-47b7-a45d-bd543edbd2c2, remoteParentNodeRef=workspace://SpacesStore/0a2ad067-8ae6-4395-93de-b0001a2f64e8, auditToken=AuditToken[{"changeType":"CREATE","auditIds":[1233688],"nodeRef":"workspace:\/\/SpacesStore\/0ef5354b-0b73-47b7-a45d-bd543edbd2c2"}]] at org.alfresco.enterprise.repo.sync.transport.impl.CloudSyncMemberNodeTransportImpl$1.execute(CloudSyncMemberNodeTransportImpl.java:750) at org.alfresco.enterprise.repo.sync.transport.impl.CloudSyncMemberNodeTransportImpl$1.execute(CloudSyncMemberNodeTransportImpl.java:699) at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:388) at org.alfresco.enterprise.repo.sync.transport.impl.CloudSyncMemberNodeTransportImpl.doFetchAndAction(CloudSyncMemberNodeTransportImpl.java:698) at org.alfresco.enterprise.repo.sync.transport.impl.CloudSyncMemberNodeTransportImpl.fetchLocalDetailsAndApply(CloudSyncMemberNodeTransportImpl.java:675) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent$17.execute(SyncTrackerComponent.java:1622) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent$17.execute(SyncTrackerComponent.java:1565) at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:388) at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:259) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent.pullNode(SyncTrackerComponent.java:1564) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent.pullSyncSet(SyncTrackerComponent.java:1454) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent.access$1600(SyncTrackerComponent.java:79) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent$12.doWork(SyncTrackerComponent.java:1293) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent$RunAsWorker$1$1.doWork(SyncTrackerComponent.java:310) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent$RunAsWorker$1$1.doWork(SyncTrackerComponent.java:307) at org.alfresco.repo.tenant.TenantUtil.runAsWork(TenantUtil.java:171) at org.alfresco.repo.tenant.TenantUtil.runAsTenant(TenantUtil.java:116) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent$RunAsWorker$1.doWork(SyncTrackerComponent.java:306) at org.alfresco.repo.security.authentication.AuthenticationUtil.runAs(AuthenticationUtil.java:529) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent$RunAsWorker.process(SyncTrackerComponent.java:301) at org.alfresco.enterprise.repo.sync.SyncTrackerComponent$RunAsWorker.process(SyncTrackerComponent.java:285) at org.alfresco.repo.batch.BatchProcessor$TxnCallback.execute(BatchProcessor.java:712) at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:388) at org.alfresco.repo.batch.BatchProcessor$TxnCallback.run(BatchProcessor.java:756) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)