How to change hostname on NetWeaver 2004s NW (Win2k3 + MSSQL)

Question

Hi,
I'm a Virtualization expert @SAP IT. I was aked to provide a solution for hostname change process for cloned virtual machines. Here, i'm posting my solution but use it on your own risk and sideeffects can appear too (applicable to NW 2004s - don't know about side effects till now).
1. Change your hostname to a new one  (newsid for clonned) and stop SAP services with prefix SAPXYZ_AB
2. open the c:\Windows\System32\drivers\etc\hosts file and add your previous hostname at the end of 127.0.0.1 line:
    127.0.0.1       localhost      youroldhostname
3. Use sql enterprise manager (or other SQL tool) in order to connect NW's database.
4. NW's database is a database with a SAP systemID - XYZ and locate J2EE_CONFIGENTRY table
5. Open a query window and check the following SQL Query for previous appearances of your hostname
SELECT     *
FROM        J2EE_CONFIGENTRY
WHERE     (UPPER(VSTR) = 'YOUROLDHOSTNAME-WITH-CAPITAL-LETTERS')
6. If this query returns results - run the following SQL update command
UPDATE    J2EE_CONFIGENTRY
SET              VSTR = 'NEWHOSTNAME'
WHERE     (UPPER(VSTR) = 'YOUROLDHOSTNAME-WITH-CAPITAL-LETTERS')
7. if step 5 failed try to run query w/oout where statement
Best regards,
Boris Mikhailovski
System & Software engineer
Message was edited by:
        Boris Mikhailovski

Answer 1

> I'm a Virtualization expert @SAP IT. I was aked to provide a solution for hostname change process for cloned virtual machines. Here, i'm posting my solution but use it on your own risk and sideeffects can appear too (applicable to NW 2004s - don't know about side effects till now).
Just as addition:
"Officially" it's not supported to rename instances, this is especially true for Java instances:
Note 757692 - Changing the hostname for J2EE Engine 6.40/7.0 installation
<...>
This note should be applied only when the hostname of a machine where the j2ee engine was already installed has changed. It does not replace the SAP official system copy procedure and MUST NOT be used for copying of an instance to another host and/or with different SID.
<...>
Markus