Multiple Connection Pools in OBIEE 10g
Hi Experts,
My question is as follows:
Let's say in the RPD I create 2 connection pools in 1 database schema. I understand that that 1 connection pool should be dedicated for repository & session variables, and 1 connection pool dedicated to physical queries on the table.
How does OBIEE know which connection pool to use for the physical tables? I haven't been able to find anything in the RPD that tells a table which connection pool to use when running a query in answers.
Example:
Connection Pool A (used to generate session variables)
Connection Pool B (in 'theory' used for physical tables)
What is stopping answers from using Connection Pool A? What is forcing answers to use connection pool B?
An answer in OBIEE 10g is fine.
Thanks!
John
When a connection pool is named in an initialization query then that connection pool is always used even if the user is explicitly denied permission to use the connection pool.
This means that a connection pool used for initialization which does not have permissions for any user or user group can occur in any order in the connection pool list. But if it has permissions for a specific user or user group then it must be placed after any general query connection pools for the same user or group to ensure that it is not used for general purpose queries.
Refer: http://everythingoracle.com/obieecnpl.htm
Please mark if helps.
Thanks,
-A.Y
Similar Messages
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Query about multiple connection pools under one database
Hi,
I have s query about connection pool, now we have a requirement,
we have two schemas in one db, some data store in one schema, some in another schema,
all tables are the same, but data is different, we want to retrive all data under two schemas,
so we need two connection pools under one database,
I have set two system DSN, and each connection pool was mapping to one DSN,
but after I importing tables into RPD, when I view data, there is a dialog let me select connection pool. so If this, when we drag columns in answer, it will definitely get wrong.
so how to realize this function about multiple connection pools under one database and we can get data normally.Hi,
Try this step
1)Better to create two different DSN for the same database with different user id and password
2)now create multiple connection pool in the same database in u r RPD physical layer .
also refer this link : for imporving performance
http://obiee101.blogspot.com/2009/01/obiee-multiple-connection-pools.html
http://gerardnico.com/wiki/dat/obiee/connection_pool
Thanks
Deva -
Shall I use one datasource for multiple connection pool?
Hi,
I need to clarrify that, Shall I use one Datasource for multiple connection pool in distributed transaction?
Thanks with regards
SureshNo. If its transactions across multiple databases you should use different datasources.
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Need ACES attention - connection pooling in oracle 10g rel 1
I am using TOMCAT 5.0.19 Webserver and ORACLE 10g REL 1 as the database server. I have to restart the TOMCAT Webserver in order to establish connection atleast twice or thrice in a weak. Why I am unable to see the connection pooling in oracle 10g rel 1. How to revive or establish the setup. My objective is to have a centralised oracle 10g rel 1 database server and the applications of java are run thru centralised Webserver Tomcat 5.0.19.
Can anyone please help me out optimizing the design setup.
Regards
Vijay Kumarby putting 'Need ACES' in your post title, you might have actually reduced the number of people reading your post, in other words someone >who might have suggested Thanks John for your reply. I changed the subject of the thread after not getting any reply for past 10 days. Last two days I have been updating with plea for attention to my problem. Finally I thought pulling attention of ACES, then only I edited the subject.
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Regards
Vijay Kumar -
Multiple connection pools in the same DB physical source
Hi, I have this situation in BI Admin:
A single DB with 2 physical schema and 2 Connection Pools with OCI 10/11g.
Clicking on any table I can see the data after selecting the right connection pool for that table.
I created a Business Model based upon tables from one of the 2 physical schemas and a corresponding presentation layer. It is consistent and I can view the related subject area in Answers, but when I select a Dimension column (CONVERGENZA_NEGOZIO.STATO) and the fact measure ( Convergenza_Fact.INCASSO ) in viewing results I get this error:
Odbc driver returned an error (SQLExecDirectW).
Error Details
Error Codes: OPR4ONWY:U9IM8TAC:OI2DL65P
State: HY000. Code: 10058. [NQODBC] [SQL_STATE: HY000] [nQSError: 10058] A general error has occurred. [nQSError: 17001] Oracle Error code: 942, message: ORA-00942: table or view does not exist at OCI call OCIStmtExecute. [nQSError: 17010] SQL statement preparation failed. (HY000)
SQL Issued: SELECT CONVERGENZA_NEGOZIO.STATO saw_0, Convergenza_Fact.INCASSO saw_1 FROM Convergenza ORDER BY saw_0
Is it caused by the multiple connection pools under the same DB?Yes I think that's correct, but only if you're going to use the same user to connect to them.
If you have a single user you're using to connect to a database to read data which happens to be over more than one schema, you'd use one connection pool.
However if you have entirely separate schemas (eg. different applications) and need to use a different user for each then you would use one connection pool per schema. Also if you thought you might move one of the schemas to another physical database at some point in the future it might be prudent to use a separate connection pool from the outset.
If you're still getting the error that the table cannot be found and your users have full permissions then logically the table that's being looked for does not exist, or you have not qualified it. What I mean by that is if you are connecting as USER2 and SELECT * FROM TABLE_A then the database will assume that you mean USER2.TABLE_A. If you mean USER1.TABLE_A then you need to make sure the qualification is in there.
In the admin tool check your Physical layer is set up correctly with your Physical Tables residing in the correct Physical Schemas. -
Creating a connection pool using Oracle 10g, Sun ONE Application Serve 8.1
Has any one succesfully configured Oracle 10g to work with Sun ONE Application Server 8.1 on Windows 2000 server service pack 4? I am embarking on a new J2EE project and I need to configure it as soon as possible.
I haven't done it myself on that particular service pack, but I don't see why it should be any different than configuring a connection pool on other vanilla win2k/other OSes.
Would you please try and let this forum know?
thanks. -
Physical Tables from multiple connection pools
Hi all,
we have in our RPD file two connection pools (let's say A and B), each connecting to a different source DBs.
Thus, each physical table resides either in source DB A or B (xor).
The specified connections work in Admin tool, and also direct database requests work in OBIEE 11G if we explicitly
provide the correct connection pool. The connection pools are specified in order A,B in the Admin tool.
However, using OBIEE answers always results in following error message if data from the connection pool B
is to be queried:
Error Codes: OPR4ONWY:U9IM8TAC:OI2DL65P
State: HY000. Code: 10058. [NQODBC] [SQL_STATE: HY000]
[nQSError: 10058] A general error has occurred.
[nQSError: 43113] Message returned from OBIS.
[nQSError: 17001] Oracle Error code: 942, message: ORA-00942: table or view does not exist at OCI call OCIStmtExecute.
[nQSError: 17010] SQL statement preparation failed. (HY000)
If we exchange the order of connection pools to B,A in Admin tool, we get the same error if we query
data from connection pool A.
It seems that each connection pool needs to be able to access all physical tables. Is that correct?
Thanks, Thomas
Edited by: user13376481 on Mar 4, 2013 3:08 AMHi Thomas.
I have the same escenario...
you tried the solution? worked?
Thanks.
Hamilton T -
Multiple connection pools problem
Hi,
Here is the problem. We use several connection pools to access differents
schema of our database. We also have a connection pool
opened for Weblogic Commerce which connects to the Commerce schema in our
database. Here is a sample of our weblogic.properties file:
#========================================================
# WeblogicCommerce pool and data source
#========================================================
weblogic.jdbc.connectionPool.commercePool=\
url=jdbc:oracle:thin:@careon_dev:1521:careon,\
driver=oracle.jdbc.driver.OracleDriver,\
loginDelaySecs=1,\
initialCapacity=2,\
maxCapacity=10,\
capacityIncrement=1,\
allowShrinking=true,\
shrinkPeriodMins=15,\
testConnsOnReserve=true,\
props=user=WLCS_TEST;password=WLCS_TEST,\
testTable=WLCS_IS_ALIVE,\
refreshMinutes=5
weblogic.allow.reserve.weblogic.jdbc.connectionPool.commercePool=everyone,
CareonDev
weblogic.jdbc.DataSource.weblogic.jdbc.jts.commercePool=commercePool
#========================================================
# WeblogicCommerce Document Management pool
#========================================================
# This is the pool the beans reference
weblogic.jdbc.connectionPool.docPool=\
url=jdbc:beasys:docmgmt:com.beasys.commerce.axiom.document.ref.RefDocumentPr
ovider,\
driver=com.beasys.commerce.axiom.document.jdbc.Driver,\
loginDelaySecs=1,\
initialCapacity=2,\
maxCapacity=10,\
capacityIncrement=1,\
allowShrinking=true,\
shrinkPeriodMins=15,\
refreshMinutes=10,\
props=jdbc.url=jdbc:weblogic:pool:commercePool;\
jdbc.isPooled=true;\
weblogic.t3.waitForConnection=true;\
weblogic.t3.waitSecondsForConnection=999999999999;\
docBase=C:/WebLogicCommerce/dmsBase/;\
schemaXML=C:/WebLogicCommerce/dmsBase/doc-schema.xml
weblogic.allow.reserve.weblogic.jdbc.connectionPool.docPool=everyone,
CareonDev
# Add the show doc servlet
weblogic.httpd.register.ShowDocServlet=com.beasys.commerce.content.ShowDocSe
rvlet
#========================================================
# Careon's CDRpool and data source
#========================================================
weblogic.jdbc.connectionPool.cdrPool=\
url=jdbc:oracle:thin:@careon_dev:1521:careon,\
driver=oracle.jdbc.driver.OracleDriver,\
initialCapacity=2,\
maxCapacity=10,\
capacityIncrement=2,\
allowShrinking=true,\
shrinkPeriodMins=15,\
refreshMinutes=10,\
testTable=dual,\
props=user=test;password=test
weblogic.allow.reserve.weblogic.jdbc.connectionPool.cdrPool=everyone,
CareonDev
Inpredictably, we obtain the following error:
java.sql.SQLException: Connection has already been created in this tx
context for pool named commercePool. Illegal attempt to create connection
from another pool: cdrPool
Does anybody have a solution or at least pointers ?
Many thanks,
OlivierGoh Yew Yap wrote:
>
Is there any workaround for this?Yes. In 6.0, presuming you use XA-compliant JDBC drivers
for the DBMS or DBMSes involved, transactions will be able
to involve any number of pools/DBMSes in a transaction.
For 5.1 and/or for DBMSes that do not have an XA-compliant
JDBC driver, you can write BMP beans that will do their own
JDBC access to all but one DBMS, using the non-transactional
pool driver, and you will be fully responsible for any
transactional state involving this under-the-covers JDBC.
This is easy to do in cases where a second DBMS is used
primarily for queries, not updates, so the non-JTS-managed
JDBC access can't corrupt that DBMS.
Joe
>
"Joseph Weinstein" <[email protected]> wrote in message
news:[email protected]...
Olivier Baujard wrote:
Hi,
Here is the problem.
Inpredictably, we obtain the following error:
java.sql.SQLException: Connection has already been created in this tx
context for pool named commercePool. Illegal attempt to create connection
from another pool: cdrPoolHi. This means that within a single JTS/EJB transaction, there weremultiple
beans and/or JSPs etc that got JDBC connections to do work, but not all ofthese
routines asked for a connection from the same pool. That's a requirementfor
5.1 or 4.5. The transaction coordinator and JTS driver cooperate to ensurethat
only one JDBC connection is really ever used in a given transaction. Ifmultiple
beans ask for a pool connection within a given tx, we ensure that theyreally get
the same connection. This is because JDBC drivers typically don'timplement
2-phase commit, so we must enforse that only one DBMS connection isinvolved so we
can just commit or roll back on it, and ensure transactional correctness.If a
bean asks for a connection from a different pool than a previous bean inthe same
tx, we know we can't give them the already-established connection, so wethrow
this exception.
For 6.0, for pools made with XA-compliant JDBC drivers, this will be OK.
Joe
We use several connection pools to access differents
schema of our database. We also have a connection pool
opened for Weblogic Commerce which connects to the Commerce schema in
our
database. Here is a sample of our weblogic.properties file:
#========================================================
# WeblogicCommerce pool and data source
#========================================================
weblogic.jdbc.connectionPool.commercePool=\
url=jdbc:oracle:thin:@careon_dev:1521:careon,\
driver=oracle.jdbc.driver.OracleDriver,\
loginDelaySecs=1,\
initialCapacity=2,\
maxCapacity=10,\
capacityIncrement=1,\
allowShrinking=true,\
shrinkPeriodMins=15,\
testConnsOnReserve=true,\
props=user=WLCS_TEST;password=WLCS_TEST,\
testTable=WLCS_IS_ALIVE,\
refreshMinutes=5
weblogic.allow.reserve.weblogic.jdbc.connectionPool.commercePool=everyone,
CareonDev
weblogic.jdbc.DataSource.weblogic.jdbc.jts.commercePool=commercePool
#========================================================
# WeblogicCommerce Document Management pool
#========================================================
# This is the pool the beans reference
weblogic.jdbc.connectionPool.docPool=\
url=jdbc:beasys:docmgmt:com.beasys.commerce.axiom.document.ref.RefDocumentPr
ovider,\
driver=com.beasys.commerce.axiom.document.jdbc.Driver,\
loginDelaySecs=1,\
initialCapacity=2,\
maxCapacity=10,\
capacityIncrement=1,\
allowShrinking=true,\
shrinkPeriodMins=15,\
refreshMinutes=10,\
props=jdbc.url=jdbc:weblogic:pool:commercePool;\
jdbc.isPooled=true;\
weblogic.t3.waitForConnection=true;\
weblogic.t3.waitSecondsForConnection=999999999999;\
docBase=C:/WebLogicCommerce/dmsBase/;\
schemaXML=C:/WebLogicCommerce/dmsBase/doc-schema.xml
weblogic.allow.reserve.weblogic.jdbc.connectionPool.docPool=everyone,
CareonDev
# Add the show doc servlet
weblogic.httpd.register.ShowDocServlet=com.beasys.commerce.content.ShowDocSe
rvlet
#========================================================
# Careon's CDRpool and data source
#========================================================
weblogic.jdbc.connectionPool.cdrPool=\
url=jdbc:oracle:thin:@careon_dev:1521:careon,\
driver=oracle.jdbc.driver.OracleDriver,\
initialCapacity=2,\
maxCapacity=10,\
capacityIncrement=2,\
allowShrinking=true,\
shrinkPeriodMins=15,\
refreshMinutes=10,\
testTable=dual,\
props=user=test;password=test
weblogic.allow.reserve.weblogic.jdbc.connectionPool.cdrPool=everyone,
CareonDev
Inpredictably, we obtain the following error:
java.sql.SQLException: Connection has already been created in this tx
context for pool named commercePool. Illegal attempt to createconnection
from another pool: cdrPool
Does anybody have a solution or at least pointers ?
Many thanks,
Olivier--
PS: Folks: BEA WebLogic is in S.F. with both entry and advanced positionsfor
people who want to work with Java and E-Commerce infrastructure products.Send
resumes to [email protected]
The Weblogic Application Server from BEA
JavaWorld Editor's Choice Award: Best Web Application Server
Java Developer's Journal Editor's Choice Award: Best Web ApplicationServer
Crossroads A-List Award: Rapid Application Development Tools for Java
Intelligent Enterprise RealWare: Best Application Using a ComponentArchitecture
http://www.bea.com/press/awards_weblogic.html
PS: Folks: BEA WebLogic is in S.F. with both entry and advanced positions for
people who want to work with Java and E-Commerce infrastructure products. Send
resumes to [email protected]
The Weblogic Application Server from BEA
JavaWorld Editor's Choice Award: Best Web Application Server
Java Developer's Journal Editor's Choice Award: Best Web Application Server
Crossroads A-List Award: Rapid Application Development Tools for Java
Intelligent Enterprise RealWare: Best Application Using a Component Architecture
http://www.bea.com/press/awards_weblogic.html -
Multiple Connection Pools in Weblogic
Hello.
We have a requirement whereby a user logging on to an existing web application has the option to then use another application that uses a different database.
So.. I configured Weblogic with a second Connection Pool and a second Data Source, which references the new Connection Pool.
In order acces the new Connection Pool, I tried this:
Context ctx = null;
Hashtable ht = new Hashtable();
ht.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
ht.put(Context.PROVIDER_URL, "ourProviderUrl");
ctx = new InitialContext(ht);
ds = (javax.sql.DataSource) ctx.lookup("newDataSourceName");but it didn't work. The Data Source couldn't be resolved (I don't have the stack trace of the exception at the moment.)
How can I access the different connection pools?
Am I going about this the wrong way?
Help much appreciated!!Here's the stack trace:
java.rmi.UnexpectedException: Unexpected exception in indecs.bip.services.UserManagerEJB.getNumSesionesActivas():
java.lang.Exception: javax.transaction.TransactionRolledbackException: Error in ejbCreate:: javax.ejb.CreateException: SessionManager.create error: javax.naming.NameNotFoundException: Unable to resolv
e 'TxBIPDataSource' Resolved: '' Unresolved:'TxBIPDataSource' ; remaining name 'TxBIPDataSource'
at indecs.bip.services.SessionManagerEJB.ejbCreate(SessionManagerEJB.java:235)
at indecs.bip.services.SessionManagerEJB_qjvfpz_Impl.ejbCreate(SessionManagerEJB_qjvfpz_Impl.java:112)
at java.lang.reflect.Method.invoke(Native Method)
at weblogic.ejb20.pool.StatelessSessionPool.createBean(StatelessSessionPool.java:148)
at weblogic.ejb20.pool.StatelessSessionPool.getBean(StatelessSessionPool.java:98)
at weblogic.ejb20.manager.StatelessManager.preInvoke(StatelessManager.java:154)
at weblogic.ejb20.internal.BaseEJBObject.preInvoke(BaseEJBObject.java:126)
at weblogic.ejb20.internal.StatelessEJBObject.preInvoke(StatelessEJBObject.java:61)
at indecs.bip.services.SessionManagerEJB_qjvfpz_EOImpl.getSesion(SessionManagerEJB_qjvfpz_EOImpl.java:29)
at indecs.bip.services.UserManagerEJB.getNumSesionesActivas(UserManagerEJB.java:79)
at indecs.bip.services.UserManagerEJB_ymjd1a_EOImpl.getNumSesionesActivas(UserManagerEJB_ymjd1a_EOImpl.java:1254)
at indecs.bip.services.UserManagerEJB_ymjd1a_EOImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:359)
at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:114)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:313)
at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:762)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:308)
at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:30)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)"TxBIPDataSource" is the name of the original Data Source. -
Hi,
I have a requirement to build a report. The columns are scatterred in different connection pools. Copying the tables from different databases gives me error of OCI.
What is the best way of doing this, i do not have the connection entries like username and pwd for different connection pools so i cannot import from the database.
Is there some easy way of doing this.
Help will be appreciated
Rgds
Amithi Amit,
I have imported some tables which has the columns and when i queried the rpd i found some columns residing in different databases. Then you need to import to RPD from different sources(connection pool1,2....)
so is it the right way to bring in tables from different connection pools and build the tables or have one connection poolYeah there will be no issue if u have more connection pool we can create the report,make the join conditions properly
Let me know if u are facing problem
thanks,
Saichand.v -
How to make a connection pools to oracle 10g in sun application server 8
env:
windows xp.
sun application server 8
oracle 10g in windows xp .
I do this
1: copy the oracle jdbc ojdbc14.jar orai18n.jar file to sun/appserver/lib
2. add path in admin console
3. restart the server
4. make a connnect pools with resource type javax.sql.DataSource
5.add properties with password,username ,database name= jdbc:oracle:thin:@127.0.0.1:1521:orcl ,(with this url ,my jdbc program can connect oracle10).
6 .try the ping , it show Operation 'pingConnectionPool' failed in 'resources' Config Mbean. Target exception message: Connection could not be allocated because: 指定了无效的(direct to unusale) Oracle URL: OracleDataSource.makeURL
please replay to me ,thank very much.I change the thin driver to oci driver ,jdbc:oracle:oci:@orcl ,then fix the problem.
-
How to configure Connection pooling in 10g AS for OCI client
Oracle Version: 10.1.3.1
Operating System: HP UX B.11.23 64 bit OS
Hello everyone,
In my connection pools setting of 10g Application server Control my application currently uses JDBC thin client. I need to move to OCI driver. My application uses JDBC 3.0
Can someone please help me out with the steps?
Thanks & Regards,
Prashanthttp://jakarta.apache.org/tomcat/tomcat-5.0-doc/jndi-datasource-examples-howto.html
-
Establishing multiple WLEC connection pools
Running WLS 6.0 communicating with WLE 4.2:
I'm looking at setting up multiple connection pools to communicate with multiple
WLE application domains.
The code fragment below is from the BEA documentation and works fine if you know
the domain(pool) name. My code uses the "lookup" method in the InitialContext
class to get the pool name for single WLEC pool/domain configuration. Is there
a method to return a list of domain(pool) names?
Each WLEC connection pool has a Tobj_Bootstrap object that lets you access the
associated WLE domain. The WLEC component provides an object called BootstrapFactory
which provides access to the Tobj_Bootstrap object for a particular WLE domain.
Include the following code in your WebLogic Server client to connect to a WLE
domain:
Tobj_Bootstrap myBootstrap = Tobj_BootstrapFactory.getClientContext("myPool");
where
The getClientContext() method returns the Tobj_Bootstrap object that is associated
with myPool. If getClientContext() cannot find a WLEC connection pool with this
name, it returns null.
myPool is the name of a WLEC connection pool for the desired WLE domain. This
WLEC connection pool needs to be defined in the Administration Console.Well ... It boiled down to ACLs.
"Sreeram" <[email protected]> wrote:
>
Hi
I have WLI application ( 7.0 ) and another J2EE appliction configured
on WLS (
7.0 ). If I have multiple jdbc connection pools configured to access
different
( or even the same ) databases, I am unable to get the connection to
execute a
sql query in the J2EE app. The connection pool gets initialized properly
during
the server startup and I can see them in the console but when I try to
acquire
a connection from the pool for execution of a jdbc stmt, I am unable
to obtain
a connection. Did any one succeed in configuring mulitple jdbc connection
pools
and WLI and another J2EE app to run together on WLS 7.0? Any suggestions
are welcome.
Thanks
Sreeram -
Hi gurus,
how many types of connection pool? i heard about some connection pool like super user,mega user,general but am not aware of that if any one please explain it what is it?
Regards,
PrabhuBasically, a connection pool is used to connect the OBIEE RPD to a database. It could be any data source varying from a database to a flat file. In more detail below:
The connection pool is an object in the Physical layer that describes access to the data source. It contains information about the connection between the Oracle BI Server and that data source.
The Physical layer in the Administration Tool contains at least one connection pool for each database. When you create the Physical layer by importing a schema for a data source, the connection pool is created automatically. You can configure multiple connection pools for a database. Connection pools allow multiple concurrent data source requests (queries) to share a single database connection, reducing the overhead of connecting to a database.
For each connection pool, you must specify the maximum number of concurrent connections allowed. After this limit is reached, the connection request waits until a connection becomes available.
Increasing the allowed number of concurrent connections can potentially increase the load on the underlying database accessed by the connection pool. Test and consult with your DBA to make sure the data source can handle the number of connections specified in the connection pool. Also, if the data sources have a charge back system based on the number of connections, you might want to limit the number of concurrent connections to keep the charge-back costs down.
In addition to the potential load and costs associated with the database resources, the Oracle BI Server allocates shared memory for each connection upon server startup. This raises the number of connections and increases Oracle BI Server memory usage.
868844 wrote:
how many types of connection pool? i heard about some connection pool like super user,mega user,general but am not aware of that if any one please explain it what is it?Comming back to your question regarding different type of users in the connection pool, I believe you are talking about the user of the database and his priviliges. You will need to use a database account with create priviliges, if you want to be able to create tables, write back etc in the database. If it is all about reading the data from the database then all you need a regular database account with read priviliges.
Hope your question is answered.
Please award points if helpful.
Thanks,
-Amith. -
Mapping Data Source and Connection Pools
Is it possible to Map a Data Dource with Multiple connection pools in Weblogic ? If Yes how do we do that ?
Which version of WLS are you using. With version 10.0 you could use a multi data source.
http://e-docs.bea.com/wls/docs100/jdbc_admin/jdbc_multidatasources.html
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