DNS Issues with DHCP in Windows Server 2008 Failover Cluster

July 21, 2009 at 5:12 pm

[] [] [] [] [] [] [] [] [] [] [] [] [] [] [] []

Symptom
If you use DHCP in Windows Server 2008 Failover Clustering, you obtain duplicate DNS entries that have the same IP-Address for two different host names.
This applies to all Windows Server 2008 versions with SP1 and SP2.
Other terms
MSCS, Windows Server 2008 Failover Clustering, Failover Cluster, DNS resolution, duplicate host name entries
Reason and Prerequisites
With Windows Server [...]

Hostname change on 7.10/7.11 java stacks

July 21, 2009 at 4:43 am

[] [] [] [] [] [] [] []

Symptom
The host name of the host where the SAP Application Server Java is running needs to be changed.
Other terms
hostname, network name, host
Reason and Prerequisites
The SAP AS Java server needs to be adapted in order to run with a new hostname.
Solution
Be aware that a new license installation is required.
Scope of this note
This note should be applied [...]

IPv4 Host name resolution on Failover Cluster Server 2008

July 17, 2009 at 5:32 pm

[] [] [] [] [] [] [] [] [] [] [] []

Symptom
The commandping -4
delivers a network address in the 169.254.2.0 subnet.
Applications that report IP addresses to other applications running on computers that do not belong to the cluster, might use this address. Therefore, the address cannot be used for general communication purposes, since it is not possible to connect to the applications at [...]

‘Unknown Host’ while communcation over http(s) within server

June 26, 2009 at 9:24 pm

[] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] []

Symptom
During the web based cross communication across web applications deployed on the same engine using http/https protocol, an exception with message ‘unknown host’ or ‘Connection to system REPOSITORY using application REPOSITORY lost’ is thrown. Although the same url is accessible over browser and the target server is up and running. For [...]