2003 Server DNS and Other  Errors ID 4000, ID 9999

I am getting multiple errors on Windows 2003 AD Server.  I have 2 domain controllers.  AD1 and AD2.  AD2 is never a problem.  AD1 will intermittently get the below error codes and descriptions.  Sometimes it is OK for 6 months and some times it happens every month or two.  A simple reboot of AD1 always corrects the issue.  Also when this happens The AD console fails to open on AD1. All other operation of the server seeems normal.

Here are the errors.

DNS Event ID 4000
The DNS server was unable to open Active Directory.  This DNS server is configured to obtain and use information from the directory for this zone and is unable to load the zone without it.  Check that the Active Directory is functioning properly and reload the zone. The event data is the error code.

DNS Event ID 9999
The DNS server has encountered numerous run-time events. To determine the initial cause of these run-time events, examine the DNS server event log entries that preceded these run-time events. The data is the number of events that have been suppressed in the last 60 minute interval.

Application Even ID 1053
Windows cannot determine the user or computer name. (Not enough storage is available to complete this operation. ). Group Policy processing aborted.

Directory Service Event ID 1863
This is the replication status for the following directory partition on the local domain controller.
 
Directory partition:
DC=ForestDnsZones,DC=abc,DC=com
 
The local domain controller has not received replication information from a number of domain controllers within the configured latency interval.
 
Latency Interval (Hours):
24
Number of domain controllers in all sites:
1
Number of domain controllers in this site:
1
 
The latency interval can be modified with the following registry key.
 
Registry Key:  
HKLM\System\CurrentControlSet\Services\NTDS\Parameters\Replicator latency error interval (hours)
 
To identify the domain controllers by name, install the support tools included on the installation  CD and run dcdiag.exe.
You can also use the support tool repadmin.exe to display the replication latencies of the domain controllers in the forest.   The command is "repadmin /showvector /latency <partition-dn>".

Directory Service Event ID 2093
This is the replication status for the following directory partition on the local domain controller.
 
Directory partition:
DC=ForestDnsZones,DC=abc,DC=com
 
The local domain controller has not received replication information from a number of domain controllers within the configured latency interval.
 
Latency Interval (Hours):
24
Number of domain controllers in all sites:
1
Number of domain controllers in this site:
1
 
The latency interval can be modified with the following registry key.
 
Registry Key:  
HKLM\System\CurrentControlSet\Services\NTDS\Parameters\Replicator latency error interval (hours)
 
To identify the domain controllers by name, install the support tools included on the installation  CD and run dcdiag.exe.
You can also use the support tool repadmin.exe to display the replication latencies of the domain controllers in the forest.   The command is "repadmin /showvector /latency <partition-dn>".


Thank you!