on 02-28-2008 2:29 AM
hi experts,
I setup separated 1 central instance and 3 dialog instances with two node DB/SCS clustered servers.
OS:windows2003
DB:MSSQL2005
SAP:NW04s ABAP
After moving cluster group(SAP,DB,other), all app servers turned to yellow in SAPMMC and showed the
message "Running but Message Server unreachable".
After few minitues goes, some of app servers turned green
and available, but others's disp + work failed and turned
gray, ofcourse it's unavailable.
it seems to be failure which happens while connecting to message server for some app servers.
If anybody has same experience or can give any advice to me, I'd like you to instruct me, please.
Thanks in advance.
Regards
MASAKI
Hi,
Did you configure your app servers to use the SAP cluster alias as SAPMSHOST ?
For Oracle, the app servers must also be in database reconnect mode. I guess there must be the equivalent foe MSSQL.
Regards,
Olivier
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Thank you for reply.
SAPMSHOST of each instance is Virtual hostname of
DB instance.
Unfortunatly I am so new to MSSQL that I have no idea
regarding reconnect setting for that.
I've tested to find cause, some failure patterns have been
found. Judging from failure patterns, the number of app server
might cause this problem.
Because in case of less than app 3 servers this problem never occure.
But in case of more than app servers this problem occure with high rate.
Regards
MASAKI
Hi,
>SAPMSHOST of each instance is Virtual hostname of
>DB instance
You can't be right on this : SAPMSHOST has to be the virtual hostname of SAP CI instance.
It is SAPDBHOST that should be set to the virtual hostname of DB instance.
Regarding the number od app servers : check the number of allowed connections in your database.
Regards,
Olivier
Dear Olivier,
I Appricate your reply very much.
I really agree with your opinion.
SAPMSHOST must be set to be the virtual hostname of SAP(SCS).
It's set by default, so it's seems to be sap bugs or something.
Fortunatly our problem solved. The solution is adding all server's hostname to hosts file.
I found so many message " time out" in dev_disp.
Maybe DNS server works so badly due to someting that it must take long time to resolve hostname and IP address.
Anyway I relly feel thankfull for your support, Thanks!!
Regards
MASAKI
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