Weblogic 8.1 Connection Pool and jta

Hi ! I am getting the below exception while migrating my application from weblogic
6.1sp2 to weblogic 8.1. When I migrate to weblogic 7.0 sp2 there are no problems.
The problem occurs specifically when I save an record using a container managed
transaction thru a stateless session bean. The save itself works, but when I
refresh my JSP, I get the following exception. Keep in mind that the same application
works fine in 7.0.
Thanks,
Eddie
java.sql.SQLException: Cannot obtain connection: driverURL = jdbc:weblogic:pool:Sybdev07Pool,
props = {enableTwoPhaseCommit=true, jdbcTxDataSource=true, connectionPoolID=Sybdev07Pool,
dataSourceName=sdaapadrDB}. Nested Exception: java.lang.RuntimeException: Failed
to setAutoCommit to true for pool connection. at weblogic.jdbc.wrapper.PoolConnection.init(PoolConnection.java:38)
at weblogic.jdbc.pool.Driver.allocateConnection(Driver.java:248) at weblogic.jdbc.pool.Driver.connect(Driver.java:158)
at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:444) at weblogic.jdbc.jts.Driver.connect(Driver.java:138)
at weblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java:298)
at

Hi Eddie,
"Eddie Baue" <[email protected]> wrote in message
news:[email protected]...
In addition to the exception below, which is displayed on the browser,the
weblogic server log has the following error:
####<Aug 1, 2003 11:50:24 AM EDT> <Warning> <JDBC> <6X19DYSZH1ZV><wla_adruat>
<Finalizer> <<anonymous>> <> <BEA-001074> <A JDBC pool connection leak wasdetected.
A connection leak occurs when a connection obtained from the pool was notclosed
explicitly by calling close() and then was disposed by the garbagecollector and
returned to the connection pool. The following stack trace at create showswhere
the leaked connection was created. [Null exception passed, creating stack
trace> for offending caller
atweblogic.utils.StackTraceUtils.throwable2StackTrace(StackTraceUtils.java:28)
at weblogic.jdbc.wrapper.PoolConnection.finalize(PoolConnection.java:69)
at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:83)
at java.lang.ref.Finalizer.access$100(Finalizer.java:14)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:160)The only case it's possible is when the weblogic.jdbc.wrapper.PoolConnection
failed during instantiation process and GC kicked in before the
Throwable holding stack trace at create was initialized.
I believe this is the result of the exception below and you can not see
this under normal circumstances.
Regards,
Slava Imeshev
>
Any info would be greatly appreciated.
Thanks,
Eddie
"Eddie Baue" <[email protected]> wrote:
Hi ! I am getting the below exception while migrating my application
from weblogic
6.1sp2 to weblogic 8.1. When I migrate to weblogic 7.0 sp2 there are
no problems.
The problem occurs specifically when I save an record using a container
managed
transaction thru a stateless session bean. The save itself works, but
when I
refresh my JSP, I get the following exception. Keep in mind that the
same application
works fine in 7.0.
Thanks,
Eddie
java.sql.SQLException: Cannot obtain connection: driverURL =
jdbc:weblogic:pool:Sybdev07Pool,
props = {enableTwoPhaseCommit=true, jdbcTxDataSource=true,connectionPoolID=Sybdev07Pool,> >dataSourceName=sdaapadrDB. Nested Exception: java.lang.RuntimeException:
Failed
to setAutoCommit to true for pool connection. at
weblogic.jdbc.wrapper.PoolConnection.init(PoolConnection.java:38)
at weblogic.jdbc.pool.Driver.allocateConnection(Driver.java:248) atweblogic.jdbc.pool.Driver.connect(Driver.java:158)
at weblogic.jdbc.jts.Driver.getNonTxConnection(Driver.java:444) atweblogic.jdbc.jts.Driver.connect(Driver.java:138)
atweblogic.jdbc.common.internal.RmiDataSource.getConnection(RmiDataSource.java
:298)
at

Similar Messages

WebLogic 6.1 losing connection pools and deployments on restart

Hi,
Has anyone else seen a problem where it appears that processing of
config.xml is incomplete, without any error message? For example, a
connection pool that is deployed fine through the console, shows as
undeployed (available) when the server is restarted, regardless of how the
server is shut down.
Most recently, this happened with a connection pool and tx data source I've
been using for weeks, when I added a RDBMSRealm going to the same database.
The EJB deployment that needs the tx data source fails on startup, but if I
redeploy the connection pool and tx data source through the console and then
deploy the EJBs everything works. Until I restart the server, when the
problem recurs.
If I go back to my backed up config.xml, without the RDBMSRealm, everything
works fine at startup.
I see no error message in any log file: it's as though config.xml entries
are being ignored.
I attach my config.xml file. The multiple targets are the result of
redeploying through the console: editing them out does't fix the problem.
Regards,
Rod Johnson
[config.xml]

hi.
Please post this question in weblogic.developer.interest.jdbc.
Thanks,
Michael
Rod Johnson wrote:
Hi,
Has anyone else seen a problem where it appears that processing of
config.xml is incomplete, without any error message? For example, a
connection pool that is deployed fine through the console, shows as
undeployed (available) when the server is restarted, regardless of how the
server is shut down.
Most recently, this happened with a connection pool and tx data source I've
been using for weeks, when I added a RDBMSRealm going to the same database.
The EJB deployment that needs the tx data source fails on startup, but if I
redeploy the connection pool and tx data source through the console and then
deploy the EJBs everything works. Until I restart the server, when the
problem recurs.
If I go back to my backed up config.xml, without the RDBMSRealm, everything
works fine at startup.
I see no error message in any log file: it's as though config.xml entries
are being ignored.
I attach my config.xml file. The multiple targets are the result of
redeploying through the console: editing them out does't fix the problem.
Regards,
Rod Johnson
<?xml version="1.0" encoding="UTF-8"?>

<Domain Name="rj">
<Log FileName="config/rj/logs/wl-domain.log" Name="rj"/>
<Application Deployed="true" Name="ticket-app" Path=".\config\rj\applications\ticket-app">
<EJBComponent Name="ticket-ejb/ticket-ejb"
Targets="rj,rj,rj,rj,rj,rj" URI="ticket-ejb/ticket-ejb.jar"/>
<WebAppComponent Name="ticket-war" Targets="rj,rj" URI="ticket-war"/>
</Application>
<Security GuestDisabled="false" Name="rj"
PasswordPolicy="wl_default_password_policy" Realm="wl_default_realm"/>
<CustomRealm
ConfigurationData="server.host=ldapserver.example.com;membership.scope.depth=1;microsoft.membership.scope=sub;membership.filter=(|(&(memberobject=%M)(objectclass=memberof))(&(groupobject=%M)(objectclass=groupmemberof)));group.dn=ou=Groups, o=ExampleMembershipDir;group.filter=(&(cn=%g)(objectclass=mgroup));server.principal=cn=Administrator, ou=Members, o=ExampleMembershipDir;user.dn=ou=Members, o=ExampleMembershipDir;user.filter=(&(cn=%u)(objectclass=member))"
Name="defaultLDAPRealmForMicrosoftSiteServer"
Notes="This is provided as an example. Before enabling this Realm, you must edit the configuration parameters as appropriate for your environment."
Password="{3DES}aTzgEUdjzAqaEDs0MC2lBQ==" RealmClassName="weblogic.security.ldaprealmv2.LDAPRealm"/>
<JDBCTxDataSource JNDIName="ticket-ds" Name="ticket-ds"
PoolName="ticket-pool" Targets="rj,rj,rj,rj"/>
<Application Deployed="true" Name="DefaultWebApp" Path=".\config\rj\applications">
<WebAppComponent Name="DefaultWebApp" Targets="rj" URI="DefaultWebApp"/>
</Application>
<PasswordPolicy Name="wl_default_password_policy"/>
<JTA Name="rj"/>
<Application Deployed="true" Name="certificate" Path=".\config\rj\applications">
<WebAppComponent Name="certificate" Targets="rj" URI="certificate.war"/>
</Application>
<Realm CachingRealm="ticketCaching Realm"
FileRealm="wl_default_file_realm" Name="wl_default_realm"/>
<CachingRealm BasicRealm="ticketRDBMS Realm" Name="ticketCaching Realm"/>
<JDBCConnectionPool DriverName="COM.cloudscape.core.RmiJdbcDriver"
InitialCapacity="3" MaxCapacity="15" Name="ticket-pool"
Properties="user=portal;password=portal" Targets="rj,rj,rj,rj" URL="jdbc:cloudscape:rmi:d:\\book\\db\\csdb"/>
<DomainLogFilter Name="MyDomain Log Filter" SeverityLevel="64" SubsystemNames="JTA,EJB"/>
<Server DomainLogFilter="MyDomain Log Filter" ListenPort="7001"
Name="rj" NativeIOEnabled="true" StdoutDebugEnabled="true"
StdoutSeverityLevel="64" TransactionLogFilePrefix="config/rj/logs/">
<ExecuteQueue Name="default" ThreadCount="15"/>
<KernelDebug Name="rj"/>
<Log FileName="config/rj/logs/weblogic.log" Name="rj"/>
<ServerStart Name="rj"/>
<ServerDebug Name="rj"/>
<WebServer DefaultWebApp="DefaultWebApp"
LogFileName="./config/rj/logs/access.log"
LoggingEnabled="true" Name="rj"/>
<SSL Enabled="true" ListenPort="7002" Name="rj"
ServerCertificateChainFileName="config/rj/ca.pem"
ServerCertificateFileName="config/rj/democert.pem" ServerKeyFileName="config/rj/demokey.pem"/>
</Server>
<SNMPAgent Name="rj"/>
<ApplicationManager Name="rj"/>
<CustomRealm
ConfigurationData="user.filter=(&(uid=%u)(objectclass=person));user.dn=ou=people, dc=example, dc=com;server.principal=cn=Manager, dc=example, dc=com;membership.filter=(&(uniquemember=%M)(objectclass=groupofuniquenames));group.filter=(&(cn=%g)(objectclass=groupofuniquenames));server.host=ldapserver.example.com;group.dn=ou=groups, dc=example, c=com"
Name="defaultLDAPRealmForOpenLDAPDirectoryServices"
Notes="This is provided as an example. Before enabling this Realm, you must edit the configuration parameters as appropriate for your environment."
Password="{3DES}aTzgEUdjzAqaEDs0MC2lBQ==" RealmClassName="weblogic.security.ldaprealmv2.LDAPRealm"/>
<CustomRealm
ConfigurationData="user.filter=(&(uid=%u)(objectclass=person));user.dn=ou=people, o=beasys.com;server.principal=uid=admin, ou=Administrators, ou=TopologyManagement, o=NetscapeRoot;membership.filter=(&(uniquemember=%M)(objectclass=groupofuniquenames));group.filter=(&(cn=%g)(objectclass=groupofuniquenames));server.host=ldapserver.example.com;group.dn=ou=groups, o=beasys.com"
Name="defaultLDAPRealmForNetscapeDirectoryServer"
Notes="This is provided as an example. Before enabling this Realm, you must edit the configuration parameters as appropriate for your environment."
Password="{3DES}aTzgEUdjzAqaEDs0MC2lBQ==" RealmClassName="weblogic.security.ldaprealmv2.LDAPRealm"/>
<FileRealm Name="wl_default_file_realm"/>
<CustomRealm
ConfigurationData="user.filter=(&(cn=%u)(objectclass=person));user.dn=ou=people, o=example.com;server.principal=cn=admin, o=example.com;membership.filter=(&(member=%M)(objectclass=groupofuniquenames));group.filter=(&(cn=%g)(objectclass=groupofuniquenames));server.host=ldapserver.example.com;server.ssl=true;group.dn=ou=groups, o=example.com"
Name="defaultLDAPRealmForNovellDirectoryServices"
Notes="This is provided as an example. Before enabling this Realm, you must edit the configuration parameters as appropriate for your environment."
Password="{3DES}aTzgEUdjzAqaEDs0MC2lBQ==" RealmClassName="weblogic.security.ldaprealmv2.LDAPRealm"/>
<RDBMSRealm DatabaseDriver="COM.cloudscape.core.RmiJdbcDriver"
DatabaseURL="jdbc:cloudscape:rmi:d:\\book\\db\\csdb"
DatabaseUserName="portal" Name="ticketRDBMS Realm" SchemaProperties="getGroupMembers=SELECT GM_GROUP, GM_MEMBER from groupmembers WHERE GM_GROUP = ?;deleteGroup2=DELETE FROM aclentries WHERE A_PRINCIPAL = ?;deleteGroup1=DELETE FROM groupmembers WHERE GM_GROUP = ?;addGroupMember=INSERT INTO groupmembers VALUES ( ? , ? );getUser=SELECT EMAIL, PASSWORD FROM LOGINS WHERE EMAIL = ?;getPermission=SELECT DISTINCT A_PERMISSION FROM aclentries WHERE A_PERMISSION = ?;deleteUser3=DELETE FROM aclentries WHERE A_PRINCIPAL = ?;getGroupNewStatement=true;deleteUser2=DELETE FROM groupmembers WHERE GM_MEMBER = ?;deleteUser1=DELETE FROM LOGINS WHERE EMAIL = ?;getAcls=SELECT A_NAME, A_PRINCIPAL, A_PERMISSION FROM aclentries ORDER BY A_NAME, A_PRINCIPAL;getUsers=SELECT EMAIL, PASSWORD FROM LOGINS;getGroups=SELECT GM_GROUP, GM_MEMBER FROM groupmembers;getPermissions=SELECT DISTINCT A_PERMISSION FROM aclentries;getAclEntries=SELECT A_NAME, A_PRINCIPAL, A_PERMISSION FROM aclentries WHERE A_NAME = ?
ORDER BY A_PRINCIPAL;newUser=INSERT INTO LOGINS VALUES ( ? , ? );removeGroupMember=DELETE FROM groupmembers WHERE GM_GROUP = ? AND GM_MEMBER = ?"/>
</Domain>--
Developer Relations Engineer
BEA Support

Connection pool and Connection factory difference?

Hi,
Can someone clarify the difference between connection pool and connection factory.
I know connection pool is some thing like a pool of database connection manitained at one place so that an application or client can use it when it requires.
Then wat exactly is connection factory..say in 10g we always put a connection factory name in all adapters and acces the data sources like DB ,FTP,AQ ..etc
can someone clarify??
regards,

To conserve system resources and to improve the performance of transactional applications, WebLogic allows you to define a pool of client connections (generally database but may be a FTP,FILE etc. as well)
A Connection Factory object encapsulates a set of connection configuration parameters that has been defined by an administrator. A client uses it to create a connection with a service provider (generally JMS).
Regards,
Anuj

Connection pooling and auditing on an oracle database

Integration of a weblogic application with an oracle backend,
Connection pooling, and auditing ,2 conflicting requirements ?
Problem statement :
We are in the process of maintaining a legacy client server application where
the client is
written in PowerBuilder and the backend is using an Oracle database.
Almost all business logic is implemented in stored procedures on the database.
When working in client/server mode ,1 PowerBuilder User has a one-to-one relation
with
a connection(session) on the oracle database.
It is a requirement that the database administrator must see the real user connected
to the database
and NOT some kind of superuser, therefore in the PowerBuilder app each user connects
to the database
with his own username.(Each user is configured on the database via a seperate
powerbuilder security app).
For the PowerBuilder app all is fine and this app can maintain conversional state(setting
and
reading of global variables in oracle packages).
The management is pushing for web-based application where we will be using bea
weblogic appserver(J2EE based).
We have build an business app which is web-based and accessing the same oracle
backend app as
the PowerBuilder app is doing.
The first version of this web-based app is using a custom build connector(based
on JCA standard and
derived from a template provided by the weblogic integration installation).
This custom build connector is essentially a combination of a custom realm in
weblogic terms
and a degraded connection pool , where each web session(browser) has a one-to-one
relation
with the back end database.
The reason that this custom connector is combining the security functionality
and the pooling
functionality , is because each user must be authenticated against the oracle
database(security requirement)
and NOT against a LDAP server, and we are using a statefull backend(oracle packages)
which would make it
difficult to reuse connections.
A problem that surfaced while doing heavy loadtesting with the custom connector,
is that sometimes connections are closed and new ones made in the midst of a transaction.
If you imagine a scenario where a session bean creates a business entity ,and
the session bean
calls 1 entity bean for the header and 1 entity bean for the detail, then the
header and detail
must be created in the same transaction AND with the same connection(there is
a parent-child relationship
between header and detail enforced on the back end database via Primary and Foreing
Keys).
We have not yet found why weblogic is closing the connection!
A second problem that we are experincing with the custom connector, is the use
of CMP(container managed persistence)
within entity beans.
The J2EE developers state that the use of CMP decreases the develoment time and
thus also maintenance costs.
We have not yet found a way to integrate a custom connector with the CMP persistence
scheme !
In order to solve our loadtesting and CMP persistence problems i was asked to
come up with a solution
which should not use a custom connector,but use standard connection pools from
weblogic.
To resolve the authentication problem on weblogic i could make a custom realm
which connects to the
backend database with the username and password, and if the connection is ok ,
i could consider this
user as authenticated in weblogic.
That still leaves me with the problem of auditing and pooling.
If i were to use a standard connection pool,then all transaction made in the oracle
database
would be done by a pool user or super user, a solution which will be rejected
by our local security officer,
because you can not see which real user made a transaction in the database.
I could still use the connection pool and in the application , advise the application
developers
to set an oracle package variable with the real user, then on arrival of the request
in the database,
the logic could use this package variable to set the transaction user.
There are still problems with this approach :
- The administrator of the database can still not see who is connected , he will
only see the superuser connection.
- This scheme can not be used when you want to use CMP persistence , since it
is weblogic who will generate the code
to access the database.
I thought i had a solution when oracle provided us with a connection pool known
as OracleOCIConnectionPool
where there is a connection made by a superuser, but where sessions are multiplexed
over this physical pipe with the real user.
I can not seem to properly integrate this OCI connectionpool into weblogic.
When using this pool , and we are coming into a bean (session or entity bean)
weblogic is wrapping
this pool with it's own internal Datasource and giving me back a connection of
the superuser, but not one for the real user,
thus setting me with my back to the wall again.
I would appreciate if anyone had experienced the same problem to share a possible
solution with us
in order to satisfy all requirements(security,auditing,CMP).
Many Thanks
Blyau Gino
[email protected]

Hi Blyau,
As Joe has already provided some technical advice,
I'll try to say something on engineering process level.
While migrating an application from one technology to
other, like client-server to n-tier in you case, customers and
stakeholders want to push into the new system as many old
requirements as possible. This approach is AKA "we must
have ALL of the features of the old system". Mostly it happens
because they don't know what they want. Ad little understanding
of abilities of the new technology, and you will get a requirement
like the one you have in you hands.
I think "DBA must see real user" is one of those. For this
type of requirements it can make sense to try to drop it,
or to understand its nature and suggest alternatives. In this
particular case it can be a system that logs user names,
login and logout times.
Blind copying of old features into an incompatible new architecture
may endanger the whole project and can result in its failure.
Hope this helps.
Regards,
Slava Imeshev
"Blyau Gino" <[email protected]> wrote in message
news:[email protected]...
>
Integration of a weblogic application with an oracle backend,
Connection pooling, and auditing ,2 conflicting requirements ?
Problem statement :
We are in the process of maintaining a legacy client server applicationwhere
the client is
written in PowerBuilder and the backend is using an Oracle database.
Almost all business logic is implemented in stored procedures on thedatabase.
When working in client/server mode ,1 PowerBuilder User has a one-to-onerelation
with
a connection(session) on the oracle database.
It is a requirement that the database administrator must see the real userconnected
to the database
and NOT some kind of superuser, therefore in the PowerBuilder app eachuser connects
to the database
with his own username.(Each user is configured on the database via aseperate
powerbuilder security app).
For the PowerBuilder app all is fine and this app can maintainconversional state(setting
and
reading of global variables in oracle packages).
The management is pushing for web-based application where we will be usingbea
weblogic appserver(J2EE based).
We have build an business app which is web-based and accessing the sameoracle
backend app as
the PowerBuilder app is doing.
The first version of this web-based app is using a custom buildconnector(based
on JCA standard and
derived from a template provided by the weblogic integrationinstallation).
This custom build connector is essentially a combination of a custom realmin
weblogic terms
and a degraded connection pool , where each web session(browser) has aone-to-one
relation
with the back end database.
The reason that this custom connector is combining the securityfunctionality
and the pooling
functionality , is because each user must be authenticated against theoracle
database(security requirement)
and NOT against a LDAP server, and we are using a statefull backend(oraclepackages)
which would make it
difficult to reuse connections.
A problem that surfaced while doing heavy loadtesting with the customconnector,
>
is that sometimes connections are closed and new ones made in the midst ofa transaction.
If you imagine a scenario where a session bean creates a business entity,and
the session bean
calls 1 entity bean for the header and 1 entity bean for the detail, thenthe
header and detail
must be created in the same transaction AND with the same connection(thereis
a parent-child relationship
between header and detail enforced on the back end database via Primaryand Foreing
Keys).
We have not yet found why weblogic is closing the connection!
A second problem that we are experincing with the custom connector, is theuse
of CMP(container managed persistence)
within entity beans.
The J2EE developers state that the use of CMP decreases the develomenttime and
thus also maintenance costs.
We have not yet found a way to integrate a custom connector with the CMPpersistence
scheme !
In order to solve our loadtesting and CMP persistence problems i was askedto
come up with a solution
which should not use a custom connector,but use standard connection poolsfrom
weblogic.
To resolve the authentication problem on weblogic i could make a customrealm
which connects to the
backend database with the username and password, and if the connection isok ,
i could consider this
user as authenticated in weblogic.
That still leaves me with the problem of auditing and pooling.
If i were to use a standard connection pool,then all transaction made inthe oracle
database
would be done by a pool user or super user, a solution which will berejected
by our local security officer,
because you can not see which real user made a transaction in thedatabase.
I could still use the connection pool and in the application , advise theapplication
developers
to set an oracle package variable with the real user, then on arrival ofthe request
in the database,
the logic could use this package variable to set the transaction user.
There are still problems with this approach :
- The administrator of the database can still not see who is connected ,he will
only see the superuser connection.
- This scheme can not be used when you want to use CMP persistence , sinceit
is weblogic who will generate the code
to access the database.
I thought i had a solution when oracle provided us with a connection poolknown
as OracleOCIConnectionPool
where there is a connection made by a superuser, but where sessions aremultiplexed
over this physical pipe with the real user.
I can not seem to properly integrate this OCI connectionpool intoweblogic.
When using this pool , and we are coming into a bean (session or entitybean)
weblogic is wrapping
this pool with it's own internal Datasource and giving me back aconnection of
the superuser, but not one for the real user,
thus setting me with my back to the wall again.
I would appreciate if anyone had experienced the same problem to share apossible
solution with us
in order to satisfy all requirements(security,auditing,CMP).
Many Thanks
Blyau Gino
[email protected]

Creation of connection pools and data sources

Hi,
is there a possibility to create jdbc connection pools and data sources not manually, with a script or a mbean?
That would be helpfull, because at the moment every developper has to do that for himself (because of the individuals generated passwords).
Thanxs

The weblogic.management.configuration.JDBCDataSourceMBean
defines a non-transactional JDBC data source.
http://e-docs.bea.com/wls/docs90/javadocs_mhome/weblogic/management/configuration/JDBCDataSourceMBean.html
The JDBCConnectionPoolMBean defines a JDBC connection pool.
http://e-docs.bea.com/wls/docs90/javadocs_mhome/weblogic/management/configuration/JDBCConnectionPoolMBean.html

Using oracle's connection pools and transactional context

Hi!
I have an implementations of existing interfaces ( let's call this layer as
data access layer) which abstracts the connection and transactional session
from the calling application. This implementaion makes use of Oracles JVM
inside the oracle database (8.1.7) to create and maintain the connection
pools and the transactional session (transactional context). I would like
to create differenent implementation, if the calling application is a
session bean running inside the weblogic application server. is there way I
can still use the connection pools and transactinal context that I got from
the oralce if the calling application is a session bean running inside the
weblogic app.. server?
do I have to change any configuration settings in weblogic?. there might
be two scenarios..
the data access layer (the classes which deal with the connection pools and
transactions) might be running inside the oracle's JVM..
the data access layer might be running inside weblogic application server...
thanks...
Srinivas

Certainly this from SPAM. Now from anothe user :). Note sure whether I should mark you as you as SPAM as you're posting questions which are available in stackoverflow
http://stackoverflow.com/questions/26531161/biztalk-and-odp-net-connection-pools-and-connection-strings
Details provided in the other forum should provide you the answer.
I don’t want to duplicate this thread just for the sake of giving reply.
If this answers your question please mark it accordingly. If this post is helpful, please vote as helpful by clicking the upward arrow mark next to my reply.

Configure Database Connection to Weblogic 8.1 Connection Pool

Hi,
I've got an ADF BC web application which is working find for an embedded JDBC Oracle Database connection. It's Jdeveloper 10.1.2 deployed to Weblogic 8.1.
Now I'm trying to change the Database connection so it can point to a weblogic connection pool through its JNDI name. The goal is to make .ear file transportable through different weblogic domains and databases, without recompile application.
I've been trying to configure an "OracleConnectionPoolDataSource" selecting "third party driver" in Database connection wizard, but Jdeveloper throws error: Java Cast Exception, and don't let continue. What else have to do?
thanks.

I did that, but WebLogic ignores whatever I configure in Services->JDB->Connection Pools and Data Sources. Even if I remove them the application keeps on running.
Because the server only reads the connection defined from JDeveloper, which is configured in the connections.xml file placed inside the deployed .ear file.
I need to change this behaviour, and configure connections.xml pointing to Weblogic Datasource.
Thanks for your attention.

Difference between using app server connection pooling and using the driver

Hi all,
How to get connection pooling with out application server and tomcat also?
What is the difference between using app server connection pooling and using the driver supported connection pooling?
Regards,
Murali

maybe the performance of App server pool is better than the JDBC pool,
for you don't know wether the implementation of the JDBC interface is good or bad.

Difference between connection pooling and simple connection

Anybody please tell me what is the Difference between connection pooling and simple connection and also where we define connection pooling and how.
Thanks
Please reply soon
amitindia

Creating and closing connection to the database is a relatively slow process. Equally connections use database resources so you can't just open as many as you want.
A connection pool maintains a number of open connections throughout the lifetime of the application. Instead of opening and closing the connections your application just "borrows" them from the pool when they're needed.
If the pool runs out of connections it will usually create new ones as needed until you reach some predefined upper limit.
A good connection pool will also manage connections which have failed for any reason, and report code which fails to return connections to the pool (ie connection leaks).
The number of connections created at startup is referred to as the "low water mark" and the maximum number that the pool will allow to be opened at any given time is the "high water mark". If no connections are available client code will generally block until one is released.
If by "defined" you mean where can you get a working implementation then your database or application server vendor is likely to provide one. Also the Apache Jakarta Commons includes [url http://jakarta.apache.org/commons/dbcp/]an implementation which you can use with any JDBC driver.
Dave.

Is connection pooling and sharing available on Oracle 9i RDBMS ?

Hello,
I would like to connect from oracle to sql server through db link and ODBC (Heterogenous connectivity). But every session in oracle launch session in sql server. Is it possible to have connection pooling and sharing from Oracle RDBMS level ? I need one solution : when (for example) i run 100 sessions in Oracle i would like to see 10 sessions on sql server. I would like remain 90 sessions from oracle to be queued.
I would mention that i was using Heterogenous connectivity with multithreading agent (agtctl) without success.
appreciate any help :-)

There are two concepts you could evaluate, but they are mainly used for connections to the database, not to sqlserver, but if you can make them work with heterogeneous connectivity this could help:
Connection Pooling. When many sessions are connecting to the same database, it could be that some of them remain idle. Oracle can detect them and timed them out letting another session to enter into the database, letting the idle session remain open without closing its session. This is configured by means of the shared server architecture.
Session Multiplexing. Session multiplexing allows the same bandwidth to be used by many sessions at the same time, this enables the server to use fewer network connection endpoints for incoming request. In order for you to configure session multiplexing you have to configure connection manager.
Ref. Oracle® Database Net Services Administrator's Guide
10g Release 2 (10.2)
Part Number B14212-02
~ Madrid
http://hrivera99.blogspot.com/

Connection Pool and Database Sessions

Hi,
Is there any way to use the connection pool or Datasource while connecting to database?If I am using a stateless sesssion bean and using a Data Access layer which just creates a database session to write the persistence toplink objects how I can make use of application server connection pool?
Thanks,
Vinod

Hi,
Is there any way to use the connection pool or Datasource while connecting to database?If I am using a stateless sesssion bean and using a Data Access layer which just creates a database session to write the persistence toplink objects how I can make use of application server connection pool?Hi Vinod,
Yes, TopLink allows you to use the app server's connection pooling and transaction services. Chapter 2 of the Oracle9iAS TopLink Foundation Library Guide provides details as do the TopLink examples. The easiest way to set this up is by using the sessions.xml file. The sample XML below is from the file <toplink903>\examples\ias\examples\ejb\sessionbean\sessions.xml. Here we are adding the datasource defined in OC4J and specifying that we are using the OC4J transaction controller also.
<login>
<user-name>sa</user-name>
<password></password>
<datasource>java:comp/env/jdbc/ejbJTSDataSource</datasource>
<uses-external-transaction-controller>true</uses-external-transaction-controller>
<uses-external-connection-pool>true</uses-external-connection-pool>
</login>
<external-transaction-controller-class>oracle.toplink.jts.oracle9i.Oracle9iJTSExternalTransactionController</external-transaction-controller-class>
When using this approach you need to change your TopLink code slightly in the EJB methods:
a. Acquire the ACTIVE unit of work from the server
session (again, see the EmployeeSessionEJB code
example) with something like:
UnitOfWork uow = clientSession.getActiveUnitOfWork();
b. Calls to uow.commit() can be ommitted or commented out
because the EJB will handle this. Note that of course
the methods you create in the EJB that are using this
approach must have TX Required (default).
Hope this helps.
Pete

How dynamically create connection pool and Datasource

Hi
How I can dynamically create a connection pool and Data source in Oracle 10g Application server. In our J2EE application the user will be login with db user name, password and database name. I want to create connection pool and data source on the fly while login the user with database name. I our application we have access approximate 80 Databases. so my approach is given bellow
1) Planning to create 80 connection pools and 80 Data sources so when user logs in while selecting the db name i will call the appropriate data source and create the DB connection. Is there any limitation to create number of data sources in oracle app server?
2) Create DB connection with out using connection pool and data source. But i am not prefer this approach coz we need to handle some transaction in our application.
Kindly throw some light on managing connection pool programmatically or in application run time.
I would really appreciate if any one can provide any links or any inormation on this issue.
Thanks in advance.

Kindly let me know is there any drawbacks to create 80 Data Sources to connect 80 database in Oracle 10G App server and each data sources should have one connection pool. so i need to create 80 connection pool. Please let me know is this right approach or any work around to create Data source on fly for each request for corresponding database.

Listener EA2: database connection pool and connection revalidation

Hi all,
As one can expect from early adopter release there could be some bugs but I can't find any references in forum to my situation:
* My 11g XE database and listener are starting as windows services when server boots operating system (Windows Server 2003 R2).
* I configured my web server (unsupported Jetty 9.0.0.M1) to start as windows service when operating system starts.
* Apex Listener 2.0.0.268.17.05 configured to connect with XE using JDBC thin driver with default settings (initial pool size 3, max statements 10, min connections 1, max connections 10, inactivity timeout 1800, abandoned connection timeout 900)
* Because web server starts a bit faster than Oracle database when apex connects first time it gets "ORA-12528, TNS:listener: all appropriate instances are blocking new connections" (could be that database still starting but already registered service with listener)
* From listener.log file I can see that all further connections made from Apex listener succeeds
* When I try to open any apex page with browser I am getting 404 error and apex listener logs error (*time is 2 days after system startup*):
2012-11-30 3:56:02 PM oracle.dbtools.common.config.db.DatabaseConfig badConfiguration
SEVERE: The pool named: apex is not correctly configured, error: Listener refused the connection with the following error:
ORA-12528, TNS:listener: all appropriate instances are blocking new connections
ConnectionPoolException [error=BAD_CONFIGURATION]
     at oracle.dbtools.common.jdbc.ConnectionPoolException.badConfiguration(ConnectionPoolException.java:62)
     at oracle.dbtools.common.config.db.DatabaseConfig.badConfiguration(DatabaseConfig.java:146)
     at oracle.dbtools.common.config.db.DatabaseConfig.createPool(DatabaseConfig.java:168)
     at oracle.dbtools.common.config.db.DatabaseConfig.getConnection(DatabaseConfig.java:68)
     at oracle.dbtools.common.jdbc.ora.OraPrincipal.connection(OraPrincipal.java:25)
     at oracle.dbtools.apex.ModApexContext.getConnection(ModApexContext.java:320)
     at oracle.dbtools.apex.Procedure.getProcedure(Procedure.java:166)
     at oracle.dbtools.apex.OWA.validateProcedure(OWA.java:384)
     at oracle.dbtools.apex.security.Security.isValidRequest(Security.java:171)
     at oracle.dbtools.apex.ModApex.validateRequest(ModApex.java:233)
     at oracle.dbtools.apex.ModApex.doGet(ModApex.java:79)
     at oracle.dbtools.apex.ModApex.service(ModApex.java:263)
     at oracle.dbtools.rt.web.HttpEndpointBase.modApex(HttpEndpointBase.java:288)
     at oracle.dbtools.rt.web.HttpEndpointBase.service(HttpEndpointBase.java:127)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:665)
     <... Jetty web server stack ...>
     at java.lang.Thread.run(Unknown Source)
2012-11-30 3:56:02 PM oracle.dbtools.rt.web.HttpEndpointBase modApex
* Oracle listener log for same time (no errors here):
30-NOV-2012 15:56:01 * (CONNECT_DATA=(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))(SERVICE_NAME=xe)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1078)) * establish * xe * 0
30-NOV-2012 15:56:01 * (CONNECT_DATA=(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))(SERVICE_NAME=xe)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1079)) * establish * xe * 0
30-NOV-2012 15:56:01 * (CONNECT_DATA=(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))(SERVICE_NAME=xe)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1080)) * establish * xe * 0
30-NOV-2012 15:56:01 * (CONNECT_DATA=(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))(SERVICE_NAME=xe)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1081)) * establish * xe * 0
* For some reason apex listener keeps first connection status and won't try to establish new connection if first attempt finished with ORA-12528
* The same scenario is valid when at time of web server start oracle database/listener is not available - even if database and listener starts and apex successfully establishes further connections all apex pages gets 404 error
* If I restart web server windows service (while oracle db and listener still running) browser opens apex pages without errors and apex listener does not log any errors
* I know that I can avoid this error delaying start of web server windows service but it would be nice to have production release 2.x without such bugs

Hi,
Is there any way to use the connection pool or Datasource while connecting to database?If I am using a stateless sesssion bean and using a Data Access layer which just creates a database session to write the persistence toplink objects how I can make use of application server connection pool?Hi Vinod,
Yes, TopLink allows you to use the app server's connection pooling and transaction services. Chapter 2 of the Oracle9iAS TopLink Foundation Library Guide provides details as do the TopLink examples. The easiest way to set this up is by using the sessions.xml file. The sample XML below is from the file <toplink903>\examples\ias\examples\ejb\sessionbean\sessions.xml. Here we are adding the datasource defined in OC4J and specifying that we are using the OC4J transaction controller also.
<login>
<user-name>sa</user-name>
<password></password>
<datasource>java:comp/env/jdbc/ejbJTSDataSource</datasource>
<uses-external-transaction-controller>true</uses-external-transaction-controller>
<uses-external-connection-pool>true</uses-external-connection-pool>
</login>
<external-transaction-controller-class>oracle.toplink.jts.oracle9i.Oracle9iJTSExternalTransactionController</external-transaction-controller-class>
When using this approach you need to change your TopLink code slightly in the EJB methods:
a. Acquire the ACTIVE unit of work from the server
session (again, see the EmployeeSessionEJB code
example) with something like:
UnitOfWork uow = clientSession.getActiveUnitOfWork();
b. Calls to uow.commit() can be ommitted or commented out
because the EJB will handle this. Note that of course
the methods you create in the EJB that are using this
approach must have TX Required (default).
Hope this helps.
Pete

What's the difference between using a connection pool and a datasource

Howdy. I figure this is a newbie question, but I can't seem to find an
answer.
In the docs at bea, the datasource docs say
"DataSource objects provide a way for JDBC clients to obtain a DBMS
connection. A DataSource is an interface between the client program and the
connection pool. Each data source requires a separate DataSource object,
which may be implemented as a DataSource class that supports either
connection pooling or distributed transactions."
In there it says the datasource uses the connection pool, but other than
that, what is the difference between a connection pool and a datasource?

Thanks for the info. I think it makes some sense. But it's a bit greek.
I'm sure it'll make more sense the more I work with it. Thanks.
"Chuck Nelson" <[email protected]> wrote in message
news:3dcac1f5$[email protected]..
>
Peter,
Here is a more formal definition of a DataSource from the Sun site
"A factory for connections to the physical data source that thisDataSource object
represents. An alternative to the DriverManager facility, a DataSourceobject
is the preferred means of getting a connection. An object that implementsthe
DataSource interface will typically be registered with a naming servicebased
on the JavaTM Naming and Directory (JNDI) API.
The DataSource interface is implemented by a driver vendor. There arethree types
of implementations:
Basic implementation -- produces a standard Connection object
Connection pooling implementation -- produces a Connection object thatwill automatically
participate in connection pooling. This implementation works with amiddle-tier
connection pooling manager.
Distributed transaction implementation -- produces a Connection objectthat may
be used for distributed transactions and almost always participates inconnection
pooling. This implementation works with a middle-tier transaction managerand
almost always with a connection pooling manager.
Does that help clarify the distinction?
Chuck Nelson
DRE
BEA Technical Support

Problem with creating Connection pool and JNDI, driver is not detected

Hi,
I have an issue with creating Connection Pool and JNDI.
I'm using:
- JDK 1.6
- OS: Linux(ubuntu 8.10)
- Netbeans IDE 6.5.1
- Java EE 5.0
- Apache Tomcat 6.0.18 Its lib directory contains all necessary jar files for Oracle database driver
- Oracle 11g Enterprise
My problem is that the Oracle database driver is not detected when I want to create a pool (it works pretty well and is detected without any problem when I create ordinary connection by DriverManager)
Therefore after running:
InitialContext ic = new InitialContext();
Context context = (Context)ic.lookup("java:comp/env");
DataSource dataSource = (DataSource)context.lookup("jdbc/oracle11g");
Connection connection = dataSource.getConnection();and right after dataSource.getConnection() I have the following exception:
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'oracle.jdbc.OracleDriver'
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1136)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
at servlets.Servlet1.doPost(Servlet1.java:47)
at servlets.Servlet1.doGet(Servlet1.java:29)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: oracle.jdbc.OracleDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at sun.misc.Launcher$ExtClassLoader.findClass(Launcher.java:229)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1130)
... 17 more
My application context file (context.xml) is:
<?xml version="1.0" encoding="UTF-8"?>
<Context path="/WebApplication3">
<Resource auth="Container"
                  driverClassName="oracle.jdbc.OracleDriver"
                  maxActive="8"
                  maxIdle="4"
                  name="jdbc/oracle11g"
                  username="scott"
                  password="tiger"
                  type="javax.sql.DataSource"
                  url="jdbc:oracle:thin:@localhost:1521:database01" />
</Context>and my web.xml is:
    <resource-ref>
        <description>Oracle Datasource example</description>
        <res-ref-name>jdbc/oracle11g</res-ref-name>
        <res-type>javax.sql.DataSource</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>
...I found similar threads in different forums including sun, such as
http://forums.sun.com/thread.jspa?threadID=567630&start=0&tstart=0
http://forums.sun.com/thread.jspa?threadID=639243&tstart=0
http://forums.sun.com/thread.jspa?threadID=5312178&tstart=0
, but no solution.
As many suggest, I also tried to put context directly in the server.xml (instead of my application context) and referencing it by <ResourceLink /> inside my application context but it didn't work and instead it gave me the following message:
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '   ' for connect URL 'null'
Has anyone succeeded in creating a connection pool with JNDI by using Tomcat 6 or higher ? If yes, could kindly explain about the applied method.
Regards,

Hello again,
Finally I managed to run my application also with Tomcat 6.0.18. There was only two lines that had to be modified
in the context.xml file (the context of my application project and not server's)
Instead of writing
<Context antiJARLocking="true" path="/WebApplication2">
    type="javax.sql.DataSource"
    factory="org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory"
</Context>we had to write:
<Context antiJARLocking="true" path="/WebApplication2">
    type="oracle.jdbc.pool.OracleDataSource"
    factory="oracle.jdbc.pool.OracleDataSourceFactory"
</Context>- No modification was needed to be done at server level (niether server.xml nor server context.xml)
- I just added the ojdbc6.jar in $CATALINA_HOME/lib (I didn't even need to add it in WEB-INF/lib of my project)
- The servlet used to do the test was the same that I presented in my precedent post.
For those who have encountered my problem and are interested in the format of the web.xml and context.xml
with Tomcat 6.0, you can find them below:
Oracle server: Oracle 11g Enterprise
Tomcat server version: 6.0.18
Oracle driver: ojdbc.jar
IDE: Netbeans 6.5.1
The context.xml file of the web application
<?xml version="1.0" encoding="UTF-8"?>
<Context antiJARLocking="true" path="/WebApplication2">
    <Resource name="jdbc/oracle11g"
              type="oracle.jdbc.pool.OracleDataSource"
              factory="oracle.jdbc.pool.OracleDataSourceFactory"
              url="jdbc:oracle:thin:@localhost:1521:database01"
              driverClassName="oracle.jdbc.OracleDriver"
              userName="scott"
              password="tiger"
              auth="Container"
              maxActive="100"
              maxIdle="30"
              maxWait="10000"
              logAbandoned="true"
              removeAbandoned="true"
              removeAbandonedTimeout="60" />
</Context>The web.xml of my web application
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <resource-ref>
        <description>Oracle Database 11g DataSource</description>
        <res-type>oracle.jdbc.pool.OracleDataSource</res-type>
        <res-auth>Container</res-auth>
        <res-ref-name>jdbc/oracle11g</res-ref-name>
    </resource-ref>
    <servlet>
        <servlet-name>Servlet1</servlet-name>
        <servlet-class>servlets.Servlet1</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Servlet1</servlet-name>
        <url-pattern>/Servlet1</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>Ok, now I'm happy as the original problem is completely solved
Regards

Weblogic 8.1 Connection Pool and jta

Similar Messages

Maybe you are looking for