To assist in troubleshooting and resolving Test Failover or Planned Migration issues using NFS datastores with Site Recovery Manager.
This error manifests when SRM receives "testFailoverStart responded" from SRA, it starts searching for VMX files in the newly mounted NFS datastores, but if all the VM snapshot copies aren't ready in the datastore, it will fail with this error. This happens because there is still some work in progress at the storage level. When the storage array completes all of its tasks, the host is able to access all the VMX files.
Change Storage Provider Settings
Now, you should be able to run recovery plans successfully.
NOTE:
StorageProvider.hostRescanDelaySec is for FC & iSCSI datastores
StorageProvider.fetchDatastoreDelaySec is for NFS datastores (Option was introduced in SRM 8.2)
A Test failover or Planned Migration & Disaster Recovery task in Site Recovery Manager (SRM) fails.