RE: RAC behavior - with Oracle JDBC Thin Driver - is this expected behavior?
- From: "Pradeep Chetal" <Pradeep.Chetal@xxxxxxxxxxxxxx>
- To: "Bradd Piontek" <piontekdd@xxxxxxxxx>
- Date: Wed, 11 Feb 2009 16:31:33 -0500
Thanks
________________________________
From: Bradd Piontek [mailto:piontekdd@xxxxxxxxx]
Sent: Tuesday, February 10, 2009 10:54 PM
To: Pradeep Chetal
Cc: Oracle L
Subject: Re: RAC behavior - with Oracle JDBC Thin Driver - is this
expected behavior?
I believe the connect string is only one part of the equation. The 10gR2
JDBC thin driver should be able to subscribe to ONS events, but I
believe you have to enable it in the connection pool.
check out
http://www.oracle.com/technology/sample_code/products/rac/index.html for
some examples.
Bradd Piontek
"Next to doing a good job yourself,
the greatest joy is in having someone
else do a first-class job under your
direction."
-- William Feather
On Tue, Feb 10, 2009 at 6:42 PM, Pradeep Chetal
<Pradeep.Chetal@xxxxxxxxxxxxxx> wrote:
Hi,
We have a Java based app that runs with Weblogic and oracle 10gr2 as the
DB.
We use the following for the RAC string for JDBC connection
RAC_STRING =
jdbc:oracle:thin:@(DESCRIPTION=
(FAILOVER=ON)
(LOAD_BALANCE=ON)
(ADDRESS=(PROTOCOL=TCP)(HOST=dingo)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=wolf)(PORT=1521))
(CONNECT_DATA=(SERVICE_NAME=msmdb)))
We use this with a 2-node RAC and all the API calls to our application
are sort of evenly distributed between the 2 nodes.
Now if for some reason, node 1goes down, we see that NOT all the new API
calls go to node-2 RAC. Some of them are lost until we re-start the
application.
I thought the RAC_STRING will be dynamic and will NOT send calls to node
1 if it is down.
Are we missing any configuration parameters here?
Thanks,
-- Pradeep
Pradeep Chetal
Sr. Director - Infrastructure Architecture
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