MSDTC doesn't work on SQL 2k in W2k3 cluster environment

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Jack Zhang - 16 Nov 2005 16:09 GMT

Hi,

I have moved our cluster SQL 2k server from a W2k cluster to a new w2k3 SP1
cluster server recently. After the move, I found two applications that use
MSDTC didn't work. I realized that I made a mistake when I setup the MSDTC, I
didn't enable network DTC access on both nodes before I configured MSDTC and
then installed the SQL server. To remedy this problem, I deleted the MSDTC
resource in the cluster admin, and reconfigured it again after enable the
network DTC access on both nodes. However, the MSDTC on the cluster still
doesn't work. The installation sequence should configure MSDTC first, then
install SQL2K. Does this sequence matter? Do I have to reinstall the SQL
server to get MSDTC work?

I use DTCTester and get following error:

Initializing DTC
Beginning DTC Transaction
Enlisting Connection in Transaction
Error:
SQLSTATE=37000,Native error=8501,msg='[Microsoft][ODBC SQL Server
Driver][SQL Se
rver]MSDTC on server 'AWIDB1' is unavailable.'
Error:
SQLSTATE=24000,Native error=0,msg=[Microsoft][ODBC SQL Server Driver]Invalid
cur
sor state
Typical Errors in DTC Output When
a. Firewall Has Ports Closed
-OR-
b. Bad WINS/DNS entries
-OR-
c. Misconfigured network
-OR-
d. Misconfigured SQL Server machine that has multiple netcards.
Aborting DTC Transaction
Releasing DTC Interface Pointers
Successfully Released pTransaction Pointer.

Thanks in advance.

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Jack Zhang - 16 Nov 2005 20:57 GMT

Never mind. it worked. I should restart the SQL server after re-configured
the MSDTC resource. Since this server has been in production already, I just
wished that every changes would take effect dynamically.

> Hi,
>
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>
> Thanks in advance.

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Anthony Thomas - 18 Nov 2005 04:50 GMT

You are correct in that you should have followed the correct and documented
installation sequence; however, you should be able to do it after the fact.
Also know that there is a COM 1.5 bug in Windows 2003.

First, after reclustering the MSDTC, did you configure it within its own
dedicated Cluster Resource Group? It will require the creation of this
group, a dedicated SAN disk, IP, and Network Name cluster resources. Then,
you will need to fail that resource back and forth between the nodes to get
the resource registry entries to synchronize.

You will then need to take the SQL Server IP resource offline, which should
bring the resources in that group offline and then bring the group back
online.

In the SQL Server Error Log, you will see SQL Server attempting to connect
to the DTC resource; if it opens the connection, there will be no additional
messages. If it has a problem however, it will spit out a "Could not
generate resource context" type of error message. That will tell you if
this worked or not.

If this process fails, one other option would be to run through the ADVANCED
section of the SQL Server installation processes. This should
verify/generate the necessary registry key dependencies without having to
completely reinstall.

If this too does not solve the problem, then before you uninstall/reinstall,
I would seriously consider opening a Microsoft Product Support Services
case, MS PSS.

INFO: Availability of Windows Server 2003 COM+ 1.5 Rollup Package 1
http://support.microsoft.com/kb/821751/

You receive error messages when you perform a distributed transaction when
you have a SQL Server 2000 virtual server in a Windows Server 2003 clustered
environment
http://support.microsoft.com/default.aspx?scid=kb;en-us;889706

How to rebuild or move MSDTC used with a SQL failover cluster
http://support.microsoft.com/default.aspx?scid=kb;en-us;294209

How to configure Microsoft Distributed Transaction Coordinator on a Windows
Server 2003 cluster
http://support.microsoft.com/kb/301600/

How to enable network DTC access in Windows Server 2003
http://support.microsoft.com/kb/817064/

Good luck and be sure to let us know how it turns out.

Sincerely,

Anthony Thomas

> Hi,
>
[quoted text clipped - 35 lines]
>
> Thanks in advance.

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Geoff N. Hiten - 18 Nov 2005 10:33 GMT

Did you set the security on MSDTC through the Component Services Applet?
That is a necessary step after all the steps you listed.

Signature

Geoff N. Hiten
Senior Database Administrator
Microsoft SQL Server MVP

> Hi,
>
[quoted text clipped - 39 lines]
>
> Thanks in advance.

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