RE: rac & client connection

From: Eric Gross <egross_at_gridapp.com>
Date: Tue, 20 Feb 2007 08:47:56 -0500
Message-ID: <C0A5E31718FC064A91E9FD7BE2F081B1AA1A91@exchange.gridapp.com>

That is one of the messages you can get when you need to re-execute a command because the information is not available on the instance you are now accessing after a TAF event. Check out Which are the Oracle Errors (TAF Events) to be Handled for RAC Failover - 337178.1.

Eric Gross

Mr. Database

GridApp Systems

Ph: 646-452-4050

egross_at_gridapp.com

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Ujang Jaenudin Sent: Monday, February 19, 2007 11:30 PM To: Hemant K Chitale
Cc: oracle-l_at_freelists.org
Subject: Re: rac & client connection

ok hemant, thanks. i got the solution.

but when trying TAF, still got problem.

SQL> SELECT instance_name, host_name,
  2 NULL AS failover_type,
  3 NULL AS failover_method,
  4 NULL AS failed_over
  5 FROM v$instance
  6 UNION
  7 SELECT NULL, NULL, failover_type, failover_method, failed_over   8 FROM v$session
  9 WHERE username = 'SYSTEM';

INSTANCE_NAME HOST_NAME FAILOVER_TYPE FAILOVER_M FAI

---------------- -------------------------------------------
------------- ---------- ---
racdb3           rac3pub
                                                                NONE
NONE       NO
                                                              SELECT
BASIC      YES

got error when execute this on node3 and later I shutdown abort the racdb3 instance.
select * from sh.sales;

ERROR:
ORA-25401: can not continue fetches
5085 rows selected

#tnsnames entry:

RACDB =
(DESCRIPTION=
(ADDRESS_LIST=

      (LOAD_BALANCE=ON)
      (FAILOVER=ON)
      (ADDRESS=(PROTOCOL=TCP)(HOST=10.1.3.71)(PORT=1521))
      (ADDRESS=(PROTOCOL=TCP)(HOST= 10.1.3.81)(PORT=1521))
      (ADDRESS=(PROTOCOL=TCP)(HOST=10.1.3.91)(PORT=1521))

)
(CONNECT_DATA=

      (SERVICE_NAME=racdb)
      (FAILOVER_MODE= 
        (TYPE=SELECT)
        (METHOD=BASIC)
        (RETRIES=500)
        (DELAY=5)
      )

)
)

#as remote listener on all nodes , here i put TAF & load balance entries too
LISTENERS_RACDB =
(DESCRIPTION =
(ADDRESS_LIST =

      (LOAD_BALANCE=ON)
      (FAILOVER=ON)
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.1.3.71)(PORT = 1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.1.3.81)(PORT = 1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.1.3.91)(PORT = 1521))
      (LOAD_BALANCE = yes)

)
(CONNECT_DATA =

      (SERVICE_NAME = racdb)
      (FAILOVER_MODE=
        (TYPE=SELECT)
        (METHOD=BASIC)
        (RETRIES=500)
        (DELAY=5)
      )

)
)

#as local listener on node1 and the rest node is similar...except ip address and name
LISTENER_RACDB1 =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.1.3.71)(PORT = 1521)) regards
ujang

On 2/20/07, Hemant K Chitale <hkchital_at_singnet.com.sg> wrote:

ORA-12545 would mean that DNS lookups for rac1pub/rac2pub/rac3pub are failing.
Do a command-line "PING" to see if the Windows client can see those hostnames.
Check if they are in the DNS server.
If you errors are "random" it could just mean that the Windows client isn't finding
the hostname it is attempting. You have configured LOAD_BALANCE so the client
would not always atttempt the same name "rac1pub" -- at times it would attempt
"rac2pub" or "rac3pub" -- and one of them is missing from DNS lookups.

If you don't use a DNS server, you'd have to hardcode those entries in WINNT\SYSTEM32\DRIVERS\ETC\HOSTS

Hemant
At 10:21 AM Tuesday, Ujang Jaenudin wrote:

>ERROR:
>ORA-12545: Connect failed because target host or object does not exist 
>
>and this only happen on windows client, while in linux client it
>doesn't happen.
>
>regards
>ujang
>
>

Hemant K Chitale
http://web.singnet.com.sg/~hkchital
and
http://hemantoracledba.blogspot.com

-- 
regards
ujang 


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Received on Tue Feb 20 2007 - 07:47:56 CST