My connector wants XA, Weblogic gives RMI

Hello,
          First, yes I know Cloudscape may not be the best database for production and
          XA, but anyway, I have to use it, and it supports XA.
          Now my question :
          I'm using WLS 6.1 SP1.
          I defined a Cloudscape XA pool which seems to initialize well (the server
          logs shows initial connections creations for the XA pool successfully). For
          this pool, the driver classname I use is COM.cloudscape.core.XADataSource.
          Over this pool I defined a Tx Data Source which some JNDI name, let's say
          "MyXADataSource".
          This works well and I can get and use connections from this "MyXADataSource"
          datasource while I use it as a javax.sql.DataSource (from a BMP for
          example).
          However this DataSource is not XA. I mean that it does not implement
          javax.sql.XADataSource (the concrete class is actually
          weblogic.jdbc.common.internal.RmiDataSource). This is a problem for example
          when a connector (let's say the BlackBoxXA sample connector) tries to use
          this datasource as an XA datasource, leading to a ClassCastException.
          So why the concrete weblogic.jdbc.common.internal.RmiDataSource class is not
          an XA class ? Did I configure something wrong or forget something ?
          Thanks for your help.
          Jérôme.
          Jérôme.

Similar Messages

DataSource is XA but Weblogic gives RMI

Hello,
          First, yes I know Cloudscape may not be the best database for production and
          XA, but anyway, I have to use it, and it supports XA.
          Now my question :
          I'm using WLS 6.1 SP1.
          I defined a Cloudscape XA pool which seems to initialize well (the server
          logs shows initial connections creations for the XA pool successfully). For
          this pool, the driver classname I use is COM.cloudscape.core.XADataSource.
          Over this pool I defined a Tx Data Source which some JNDI name, let's say
          "MyXADataSource".
          This works well and I can get and use connections from this "MyXADataSource"
          datasource while I use it as a javax.sql.DataSource (from a BMP for
          example).
          However this DataSource is not XA. I mean that it does not implement
          javax.sql.XADataSource (the concrete class is actually
          weblogic.jdbc.common.internal.RmiDataSource). This is a problem for example
          when a connector (let's say the BlackBoxXA sample connector) tries to use
          this datasource as an XA datasource, leading to a ClassCastException.
          So why the concrete weblogic.jdbc.common.internal.RmiDataSource class is not
          an XA class ? Did I configure something wrong or forget something ?
          Thanks for your help.
          Jérôme.


Thanks Priscilla,
          But, so, why the BlackBoxXA connector tries to cast the datasource it
          lookups to XADataSource ?
          Jérôme.
          "Priscilla Fung" <[email protected]> a écrit dans le message de news:
          [email protected]...
          > Hi,
          >
          > The javax.sql.XADataSource, XAConnection interfaces are for container uses
          > only, and are not exposed to applications. Applications should only see
          and
          > use javax.sql.DataSource and java.sql.Connection etc. Refer to the JDBC
          2.0
          > Standard Extension spec or JDBC 3.0 spec for more info.
          >
          > Regards,
          > Priscilla
          >
          > Jérôme Beau <[email protected]> wrote in message
          > news:[email protected]...
          > > Hello,
          > >
          > > First, yes I know Cloudscape may not be the best database for production
          > and
          > > XA, but anyway, I have to use it, and it supports XA.
          > >
          > > Now my question :
          > >
          > > I'm using WLS 6.1 SP1.
          > >
          > > I defined a Cloudscape XA pool which seems to initialize well (the
          server
          > > logs shows initial connections creations for the XA pool successfully).
          > For
          > > this pool, the driver classname I use is
          COM.cloudscape.core.XADataSource.
          > >
          > > Over this pool I defined a Tx Data Source which some JNDI name, let's
          say
          > > "MyXADataSource".
          > >
          > > This works well and I can get and use connections from this
          > "MyXADataSource"
          > > datasource while I use it as a javax.sql.DataSource (from a BMP for
          > > example).
          > >
          > > However this DataSource is not XA. I mean that it does not implement
          > > javax.sql.XADataSource (the concrete class is actually
          > > weblogic.jdbc.common.internal.RmiDataSource). This is a problem for
          > example
          > > when a connector (let's say the BlackBoxXA sample connector) tries to
          use
          > > this datasource as an XA datasource, leading to a ClassCastException.
          > >
          > > So why the concrete weblogic.jdbc.common.internal.RmiDataSource class is
          > not
          > > an XA class ? Did I configure something wrong or forget something ?
          > >
          > > Thanks for your help.
          > >
          > > Jérôme.
          > >
          > >
          >
          >

NullPointerException in weblogic.jdbc.rmi.SerialConnection.createStatement()

Hello,
we are running WLS 6.1 SP2. The following code sometimes (rather rarely) throws
a NullPointerException:
Connection dbConnection = DBUtil.getDBConnection();//here we get the Connection
stmt = dbConnection.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE);//it's
where NPE happens
The error report says:
java.sql.SQLException:
java.lang.NullPointerException at
weblogic.jdbc.rmi.SerialConnection.createStatement(SerialConnection.java:396)
So, I think, this is something in WebLogic's code... Is this a known issue (I
couldn't find a similar report in the newsgroup)? Is there a workaround?
regards,
Vitaly

Vitaly Sourikov wrote:
"Vitaly Sourikov" <[email protected]> wrote:
The patches that we use with SP2 are
CR061106_61sp2.jar
CR072612_61sp2.jar
CR077919_61sp2.jar
As far as we know, those fixes (or some of them) were not introduced in SP4. Are
there new versions of the patches for SP4?I have found that all these bugs are fixed in sp4, so no patches are needed if you
upgrade to 6.1sp4.
Joe
>
>
regards,
Vitaly
Hi Joseph,
Thank you for the reply. Unfortunately, we cannot move to SP3 or SP4
- they have
conflicts with other patches from WebLogic we use. This error happens
rather rarely.
In most of cases this very stuff works. But it would be intresing to
have this
patch for diagnostics, in case of future failures. Would you send it
to me, please?
Thank you in advance,
Vitaly
Joseph Weinstein <[email protected]> wrote:
Vitaly Sourikov wrote:
Hello,
we are running WLS 6.1 SP2. The following code sometimes (rather rarely)throws
a NullPointerException:
Connection dbConnection = DBUtil.getDBConnection();//here we get theConnection
stmt = dbConnection.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE);//it's
where NPE happens
The error report says:
java.sql.SQLException:
java.lang.NullPointerException at
weblogic.jdbc.rmi.SerialConnection.createStatement(SerialConnection.java:396)
So, I think, this is something in WebLogic's code... Is this a knownissue (I
couldn't find a similar report in the newsgroup)? Is there a workaround?Hi. The NPE is probably happening in the actual DBMS driver. What is
happening
is that the rmi driver is having to catch any non-SQLException, andthrow
a SQLException
with the message of the original exception. Unfortunately, the fullstacktrace
of the
original NPE is lost. If you want, I can send you a small diagnostic
patch, which will
just make the rmi object retain the whole original stacktrace in the
exception it throws,
and that will help lead to the real problem.
This may well be a bug that was fixed in sp3 or 4. Is it possible
for you to upgrade to
the latest stuff?
Joe
regards,
Vitaly

ClassCastException: weblogic.jdbc.rmi.SerialResultSet

HI,
I am using WebLogic 6.0 SP2 connection pooling to get CLOB data from Oracle database.
It is working fine to get the connection and get non-CLOB data like string, but
when I retrieve the CLOB column in my program such as, theClob = ((oracle.jdbc.OracleResultSet)
rs).getCLOB(1),
Weblogic throws ClassCastException: weblogic.jdbc.rmi.SerialResultSet, does anybody
experience the same problem ? How can I get around this problem ?
Thanks
John

Hi,
I've got the same error. The only diference is that I read BLOBs out of the table
((oracle.jdbc.OracleResultSet)rset).getBLOB(1) from oracle.jdbc.OracleResultSet).
Best regards,
Kai
"John Chen" <[email protected]> wrote:
>
HI,
I am using WebLogic 6.0 SP2 connection pooling to get CLOB data from
Oracle database.
It is working fine to get the connection and get non-CLOB data like string,
but
when I retrieve the CLOB column in my program such as, theClob = ((oracle.jdbc.OracleResultSet)
rs).getCLOB(1),
Weblogic throws ClassCastException: weblogic.jdbc.rmi.SerialResultSet,
does anybody
experience the same problem ? How can I get around this problem ?
Thanks
John

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Weblogic.jdbc20.rmi.SerialConnection fail to prepareCall()

Hi, I have a stateless session bean calling an oracle8i stored procedure. The java.sql.Connection is obtained via weblogic DataSource (non-transactional). and this line is failing:CallableStatement cstmt = conn.prepareCall(qstr);Start of the stack is this:java.sql.SQLException: java.lang.NullPointerException: at weblogic.jdbc20.rmi.SerialConnection.prepareCall(SerialConnection.java:44)I tested printing conn.toString() and it gave me "weblogic.jdbc20.rmi.SerialConnection@43074758", but any other method on this Connection object will fail.Yet, same program runs just fine in servlet. Any idea why? How does weblogic.jdbc20.rmi.SerialConnection come to into play? What is it?Any help is appreciated!Alan

Potluri wrote:
>
WLS 6.1 on Win 2000 and trying to connect Oracle database on remote Unix machine.Let me know if you're at the latest service pack level. This feels like a bug that
has been fixed...
Joe
>
Joseph Weinstein <[email protected]> wrote:
Potluri wrote:
Hi ,
I am using CallableStatement to update the database. When i tried tocreate the
callable statement it is throwing the following exception. can anysuggest some
solution for this....
java.sql.SQLException: java.lang.NullPointerException
at weblogic.jdbc.rmi.SerialConnection.prepareCall(SerialConnection.java:
106)
PotluriWhat version of the server are you running?
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WebLogic test RMI

Hi,
I'm trying to test a call RMI in WebLogic 10.3.6 but an error is generated...
String serviceAddress = "rmi://localhost:7001/BeanRemoteService";
Naming.lookup(serviceAddress);
java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:
     java.io.EOFException
     at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:286)
     at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
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     ... 7 more
javax.naming.ServiceUnavailableException: error during JRMP connection establishment; nested exception is:
     java.io.EOFException
I have a wlfullclient lib in the classpath...
Can anybody help me?

If Naming.lookup() works, then you muist be binding the server using Naming.bind(). To lookup under the JNDI tree, you must bind the using JNDI, too.
jay allen wrote:
This test case uses the example classes in weblogic/examples/rmi/hello:
The rmi.hello classes are deployed on WL and the following code can connect
from a remote node and get a reference to the remote object.
try {
Hello_WLStub obj = ( Hello_WLStub )
Naming.lookup("t3://192.32.239.58:7511/HelloServer");
catch (Throwable t){
t.printStackTrace();
The following code, using WLInitialContext however, throws a
javax.naming.NameNotFoundException
Hashtable env = new Hashtable(5);
env.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFacto
ry");
env.put(Context.PROVIDER_URL,"t3://192.32.239.58:7511");
Context ctx = new InitialContext(env);
Hello_WLStub obj = ( Hello_WLStub )ctx.lookup("HelloServer");
here's the exception
javax.naming.NameNotFoundException: 'HelloServer'; remaining name
'HelloServer'
at
weblogic.rmi.extensions.AbstractRequest.sendReceive(AbstractRequest.java:76)
at
weblogic.jndi.toolkit.BasicWLContext_WLStub.lookup(BasicWLContext_WLStub.jav
a:246)
at
weblogic.jndi.toolkit.WLContextStub.lookup(WLContextStub.java:545)
at javax.naming.InitialContext.lookup(InitialContext.java:349)
at client2.main(client2.java:61)
Note, there hasn't been any security set up for weblogic.rmi or
weblogic.jndi, or the HelloImpl class. That is, 'everyone' has access.
Thanks,
Jay

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eg java.io.PrintWriter@404c51.
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ClassCastException: weblogic.jdbc.rmi.SerialPreparedStatement

I am attempting to retrieve CLOBs and XMLTypes in a servelet from a 9i release
2 database. Using sampe code from oracle, I am getting ClassCastException when
I attempt to cast ...
oracle.jdbc.OraclePreparedStatement stmt =
(oracle.jdbc.OraclePreparedStatement) conn.prepareStatement( sql );
The connection pool sets up fine, no errors. I am getting the connection in the
servlet through the JNDI lookup ... (see code)
From the config.xml, the jdbc setup ...
<JDBCConnectionPool DriverName="oracle.jdbc.driver.OracleDriver"
InitialCapacity="3" MaxCapacity="10" Name="9iR2Pool"
Properties="user=kr;password=*****;dll=ocijdbc9;protocol=oci8"
Targets="myserver" URL="jdbc:oracle:oci8:@ora9i"/>
Has anyone done this before? Is there another way? Does bea have 9i release
2 jdbc drivers?
[huh.java]

Hi Rick,
JDBC objects obtained via a connection pool
can not be cast to anything oracle.jdbc.*.
In order to use oracle-specific functions of
prepared statements you need to use oracle
extensions provided by weblogic. Documentation
and examples can be found here:
http://e-docs.bea.com/wls/docs61/jdbc/thirdparty.html#1043705
Regards,
Slava Imeshev
"Rick Bradshaw" <[email protected]> wrote in message
news:3d6cfa2c$[email protected]..
>
I am attempting to retrieve CLOBs and XMLTypes in a servelet from a 9irelease
2 database. Using sampe code from oracle, I am getting ClassCastExceptionwhen
I attempt to cast ...
oracle.jdbc.OraclePreparedStatement stmt =
(oracle.jdbc.OraclePreparedStatement) conn.prepareStatement( sql );
The connection pool sets up fine, no errors. I am getting the connectionin the
servlet through the JNDI lookup ... (see code)
From the config.xml, the jdbc setup ...
<JDBCConnectionPool DriverName="oracle.jdbc.driver.OracleDriver"
InitialCapacity="3" MaxCapacity="10" Name="9iR2Pool"
Properties="user=kr;password=*****;dll=ocijdbc9;protocol=oci8"
Targets="myserver" URL="jdbc:oracle:oci8:@ora9i"/>
Has anyone done this before? Is there another way? Does bea have 9irelease
2 jdbc drivers?

My connector wants XA, Weblogic gives RMI

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