Strange behaviour when using connection pooling with proxy authentication

All
I have developed an ASP.NET 1.1 Web application that uses ODP.NET 9.2.0.4 accessing Oracle Database 8i (which is to be upgraded to 10g in the coming months). I have enabled connection pooling and implemented proxy authentication.
I am observing a strange behaviour in the live environment. If two users (User 1 and User 2) are executing SQL statements at the same time (concurrent threads in IIS), the following is occurring:
* User 1 opens a new connection, executes a SELECT statement, and closes this connection. The audit log, which uses the USER function, shows User 1 executed this statement.
* User 2 opens the same connection (before it is released to the connection pool?), excutes an INSERT statement, and closes this connection. The audit log shows User 1, not User 2, executed this statement.
Is this a known issue when using connection pooling with proxy authentication? I appreciate your help.
Regards,
Chris

Hi Chris,
I tried to reproduce your complaint, but was unable to. I didnt use auditting however, just a series of "select user from dual" with proxy authentication. You might want to see if you can put together a small complete testcase for this and open a sr with support.
Cheers
Greg

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begin
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/*   DBMS_AQADM.CREATE_QUEUE_TABLE(Queue_table        => 'TESTUSER.TEST_TABELLE_EXC'
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(context RAW
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dequeue_options   DBMS_AQ.dequeue_options_t;
message_prop      DBMS_AQ.message_properties_t;
message_hdl       raw(16);
message           sys.aq$_jms_text_message;
l_daten           VARCHAR2(32767);
ex_hugo          EXCEPTION;
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exception
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v_daten            clob;
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Hi Chris,
I tried to reproduce your complaint, but was unable to. I didnt use auditting however, just a series of "select user from dual" with proxy authentication. You might want to see if you can put together a small complete testcase for this and open a sr with support.
Cheers
Greg

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import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
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<servlet-class>oracle.jheadstart.ord.html.OrdPlayMediaServlet</servlet-class>
<init-param>
<param-name>releaseMode</param-name>
<param-value>Stateful</param-value>
</init-param>
</servlet>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>resources</servlet-name>
<servlet-class>oracle.adf.view.faces.webapp.ResourceServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>ordDeliverMedia</servlet-name>
<url-pattern>ordDeliverMedia</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>resources</servlet-name>
<url-pattern>/adf/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>35</session-timeout>
</session-config>
<mime-mapping>
<extension>html</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension>txt</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<error-page>
<exception-type>java.lang.Exception</exception-type>
<location>/faces/pages/CXSError.jspx</location>
</error-page>
</web-app>

This was an application module pooling, activation / passivation issue.
After view objects had been set-up correctly, the problem disappeared.

Strange behaviour when using ReadOnly VO on view over DBlink

I have a very simple situation which Jdeveloper 10.1.3 cannot handle.
I have user_1 who is owner of table_1 in database_1.
I have user_2 who created and owns view table_1 in database_2. User_2 owns view table_1 which is defined as select * from table table_1@database_1.
Now in database_2 i connect as user_2. After doing select * from view table_1 i can see all data in this view
Now in Jdeveloper I have a readonly viewobject; select * from view table_1 (connect = user_2@database2) . The SQL statement is valid (Test). When testing the ApplModule I can see the data in view table_1.
When I drag and drop the datacontrol on my JSP and run the JSP I get an ORA-00942 "table or view does not exist".
What is happening here ?????
Please try to reproduce this (should be easy) and help me.
Thanks Luc Bors

O boy
Was I tired........ Got it working after a good night sleep. I had a cross reference concerning different DB connections in my ADF application.....
Thanks

IO Exception Broken Pipe ORA-17002 while using connection pooling

Hi
We are experiencing "broken pipe ORA-17002 error" when using connection pooling. This seems to be a common error when implementing connection pooling, but I didn't find any solution anywhere.
we are using Oracle 9i 9.2.0.1 JDBC thin driver
Our database is Oracle 8.1.7 running on HP Unix
The middle tier(Tomcat) runs on RedHat linux server
We are using JDK1.3
It seems the connections automatically get stale or bad after certain period of time.Iam checking to see if the connection is closed, before giving the connection from the pool to the appilcation.It seems its still open.But when I start using the connection to open a callable statement or setAutocommit to false, it says Broken pipe or No more data to read from the socket.
We are implementing our own connection pooling class(we experimented with OracleConnectionCacheImpl but it too gave the same errors).
Does anybody have a solution for this problem??
Is there a workaround for this?I would like to know how connection pooling is implemented in most of the applications that use oracle database?Or do we need to explicitly test the connection before using it, and reopen a connection if that is bad??
Thanks
Anil

kalle
Thank you very much for your advice!!!
Like you said, I started to check whether the connections are fine before giving them from the pool.I am executing a simple "select 'anil' from dual" and if its fine only then I return the connection. So far it seems to be fine. Also I am reopening the connections(closing the old ones and opening new connections) after every 12 hours.
As far as the JDBC driver is concerned, I already tried with Oracle 8i driver, it gave the same problems. I read that 9i driver might solve this problem, so I changed to the latest 9i driver (classes12_g.zip).
Sometimes before(before I started checking whether the connection is good )the application used to hang up at the point where I am issuing setAutoCommit(false).It never comes out from that statement.Is this something to do with theconnections being closed?
What I am afraid is, will the appilation get hung up even after I check the connection with select query and then issue autocommit(false)??
Or will it hang up while I check with a select query??
As long as it doesn't hung up, I am fine. Because i am cathching the exceptions.
Thanks In ADVANCE
Anil

Problem using connection pooling on netbeans with mysql

Hi everyone,
I use Apache Tomcat server 5.0 and Mysql as back end. I have done connection pooling in tomcat server installation folder and everything works fine.But when I tried the same on netbeans I could not connect using connection pooling and it's throwing error as
'Name jdbc is not bound in this Context'.
When I checked the tomcat server in netbeans it says a version of tomcat 5.5.9(May be netbean's tomcat).So is there anything to be changed for server.xml of higher version tomcat above 5.0?
I need your help to solve this issue.
thanks in advance
-Jegan

Hi everyone,
I use Apache Tomcat server 5.0 and Mysql as back end. I have done connection pooling in tomcat server installation folder and everything works fine.But when I tried the same on netbeans I could not connect using connection pooling and it's throwing error as
'Name jdbc is not bound in this Context'.
When I checked the tomcat server in netbeans it says a version of tomcat 5.5.9(May be netbean's tomcat).So is there anything to be changed for server.xml of higher version tomcat above 5.0?
I need your help to solve this issue.
thanks in advance
-Jegan

Using Connection Pooling in a WLS 5.1.x - Cluster

Hi,
          We have problems using connection pooling in a WLS 5.1.x - Cluster. Is it
          possible to use CP in such a cluster at all ? The problem is, connections
          will be opened and never been closed. How can I configure a cluster for CP?
          I have a WLS-Cluster with 2 instances and my webApp uses connection pooling.
          By the way I get a connection on Instance 1, Instance 2 gets a connection
          also, but never releases it.
          In my opinion, the reference to the connection in the partner-instance will
          be lost.
          How do I have to configure my cluster to work well with that stuff ?
          Thank a lot,
          Markus.


Clustering with connection pools works fine in WLS 5.1. If connections are
          not being release, you have bugs in your code.
          When a connection is retrieved from a pool on one instance, a corresponding
          connection is NOT retrieved on another instance.
          Mike
          "M. Hammer" <[email protected]> wrote in message
          news:[email protected]..
          > Hi,
          >
          > We have problems using connection pooling in a WLS 5.1.x - Cluster. Is it
          > possible to use CP in such a cluster at all ? The problem is, connections
          > will be opened and never been closed. How can I configure a cluster for
          CP?
          >
          > I have a WLS-Cluster with 2 instances and my webApp uses connection
          pooling.
          > By the way I get a connection on Instance 1, Instance 2 gets a connection
          > also, but never releases it.
          > In my opinion, the reference to the connection in the partner-instance
          will
          > be lost.
          > How do I have to configure my cluster to work well with that stuff ?
          >
          > Thank a lot,
          >
          > Markus.
          >
          >
          >

How to use connection pool of datasource to make applications run faster?

Hi, erveryone
I prepare to implement a servlet that access database and do sync with client.
When I access database, I would like to configure a datasource in weblogic and use connection pool.
In order to make servlet application run significantly faster, my servet how to use connection poo is much moreresonable?
For example, my servlet has many times database access. Is it true that geting and close a connection whenever
one time database access finished?
If from the servlet begins, the db connection is hold till servlet finalize. Will the solution affect the servlet performance? Is there any official document to introduce connection pool program? I search some documents.
<The Java EE 6Tutorial> introduce some simple intruduction about connection pool.

1. Use WebLogic Servers Data Source for Database Connections.
2. Open and close the connections where you need it. Dont open it in begin and close in finalise. That is bad practice.
3. Even when you invoke Connection.close () webLogic will not close the connection. it will commit the transaction and return it back to the pool rather than physically closing the DB connection.
4. You can tune data source for minimum, maximum and increments of connections that you need based on your application requirement.

Strange behaviour when using connection pooling with proxy authentication

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