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

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Yes I think that's correct, but only if you're going to use the same user to connect to them.
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Edited by: user13376481 on Mar 4, 2013 3:08 AM

Hi Thomas.
I have the same escenario...
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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,
Olivier

Goh 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

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.
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Is there some easy way of doing this.
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Rgds
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thanks,
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Query about multiple connection pools under one database

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