Specifications

Reference Guide
186 VMware, Inc.
Cause
The passive server has less available disk space than the active server, preventing updates from being
replicated to the passive server. The quantity of updates from the active server exceeds the passive server's
available disk space.
Resolution
Free up some additional disk space on the passive server. Do not delete data from the protected set to prevent
data loss in the event of a switchover. You could update the disk subsystem on the passive server. After
allocating space, start replication.
Registry Status is Out of Sync
The Registry can be reported as Out of sync when one or more Registry keys fail to synchronize.
Resource Issues
Inadequate resources can cause poor performance and prevent the registry from synchronizing.
Symptom
vCenter Server Heartbeat logs the following error message:
Call to RegOpenKeyEx failed: on <Reg_Key>: Insufficient system resources exist to complete the
requested service.
Cause
One or both of the servers are running low on virtual memory.
Resolution
Restart the server to free up virtual memory.
Registry Security Issues
Inability to access the registry prevents replication of the registry.
Symptom
vCenter Server Heartbeat is unable to read, sync, or replicate the registry.
Cause
If a protected registry key has permissions that deny Write access to the System account, this can prevent
vCenter Server Heartbeat from synchronizing or replicating it.
Resolution
Change the permissions on the affected registry key to grant the System account Full Control.
Channel Drops
When the VMware Channel loses connection between the servers, the following scenarios can occur.
Performance Issues
Poor performance can be experienced as a result of a channel loss.