Dbms_application_info through connection pooling - Info about sessions

Hello all,
I try to find a way to use dbms_application_info with Siebel in order to provide me the username and the client IP of the sessions connected through connection pooling.
Have you ever been experienced in that for a Siebel environment? This would enhance our DBA monitoring as it helps us to identify the session rapidly.
Thank you in advance

Similar Messages

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

Monitoring of topLink internal connections pool

we wish to monitoring use of Toplink internal connections pool : numbers maximum used, a minimum number used.
we know to do it with the external pool (OracleAS) but not with the internal pool.
Regards

The only way to get this information is through API calls. If you have a Server (oracle.toplink.threetier) you can ask the read and default (write) connection pools.
        // Display Read Connection pool info
        System.out.println("READ Available: " +
                           server.getReadConnectionPool().getConnectionsAvailable().size());
        System.out.println("READ Minimum: " +
                           server.getReadConnectionPool().getMinNumberOfConnections());
        System.out.println("READ Maximum: " +
                           server.getReadConnectionPool().getMaxNumberOfConnections());
        // Display Write Connection pool info
        System.out.println("WRITE Available: " +
                           server.getDefaultConnectionPool().getConnectionsAvailable().size());
        System.out.println("WRITE Minimum: " +
                           server.getDefaultConnectionPool().getMinNumberOfConnections());
        System.out.println("WRITE Maximum: " +
                           server.getDefaultConnectionPool().getMaxNumberOfConnections());Doug

Connection pools, dspMaxThreads, listener-threads and ReceiverThreads?

Hi,
We are using BPEL 10.1.3.3. Our integration uses the database adapter and the AQ adapter against the same remote database 10.1.2.3. We are experiencing problems with transaction that fails with:
java.sql.SQLException: Unable to get a physical connection from the database...there are no connections available.Error Code: 0.
Then we tried to change the connection pools to not use so many connection but now instances disappears.
The 2 connections pools are setup like this:
DBAdapter connection pool with max 10 connection
AqAdapter connection pool with max 2 connections
We have 3 domains:
Default:
dspMaxThreads 20
dspMinThreads 5
Test:
dspMaxThreads 100
dspMinThreads 5
Production:
dspMaxThreads 60
dspMinThreads 5
listener-threads and ReceiverThreads are set to 300 in the orion-ejb-jar.xml in C:\oracle\product\10.1.3.1\OracleAS_1\j2ee\oc4j_soa\application-deployments\orabpel\ejb_ob_engine
I had a look at Clemens blog about lost instances (http://clemensblog.blogspot.com/2007/07/soa-suite-10133-patchset-and-lost.html) but I cannot understand the part about listener-threads and receiverThreads. Can anybody explain how the size of the connection pools and the dspMaxThreads, ReceiveThreads andlistener-threads has to be?
Regards Pete
Here are the settings for the WorkerBean:
<message-driven-deployment name="WorkerBean" listener-threads="300" min-instances="100" resource-adapter="BPELjms">
<ejb-ref-mapping name="ejb/local/DispatcherLocalBean" jndi-properties-file="jndi.properties" />
<ejb-ref-mapping name="ejb/local/CubeEngineLocalBean" jndi-properties-file="jndi.properties" />
<ejb-ref-mapping name="ejb/local/DomainManagerLocalBean" jndi-properties-file="jndi.properties" />
<ejb-ref-mapping name="ejb/local/ActivityManagerLocalBean" jndi-properties-file="jndi.properties" />
<ejb-ref-mapping name="ejb/local/CubeDeliveryLocalBean" jndi-properties-file="jndi.properties" />
<ejb-ref-mapping name="ejb/local/MessageLocalBean" jndi-properties-file="jndi.properties" />
<ejb-ref-mapping name="ejb/services/NotificationServiceBean" jndi-properties-file="jndi.properties" />
<ejb-ref-mapping name="ejb/local/TaskServiceBean" jndi-properties-file="jndi.properties" />
<config-property>
<config-property-name>ConnectionFactoryJndiName</config-property-name>
<config-property-value>BPELjms/BPELWorkerQueueFactory</config-property-value>
</config-property>
<config-property>
<config-property-name>DestinationName</config-property-name>
<config-property-value>BPELjms/BPELWorkerQueue</config-property-value>
</config-property>
<config-property>
<config-property-name>DestinationType</config-property-name>
<config-property-value>javax.jms.Queue</config-property-value>
</config-property>
<config-property>
<config-property-name>AcknowledgeMode</config-property-name>
<config-property-value>Auto-acknowledge</config-property-value>
</config-property>
<config-property>
<config-property-name>ReceiverThreads</config-property-name>
<config-property-value>300</config-property-value>
</config-property>
<config-property>
<config-property-name>ListenerThreadMaxIdleDuration</config-property-name>
<config-property-value>100000000</config-property-value>
</config-property>
<config-property>
<config-property-name>ListenerThreadMinBusyDuration</config-property-name>
<config-property-value>1</config-property-value>
</config-property>
<config-property>
<config-property-name>ListenerThreadMaxPollInterval</config-property-name>
<config-property-value>10</config-property-value>
</config-property>
</message-driven-deployment>Please :-)
Message was edited by:
Peter Lorenzen

Thanks Marc,
Yes I have and I got it working. If you set dspMaxThread to 90 and my connections pools to max session 90 it works. Don't understand why it has to be so high. It's potentially a lot of resources that has to be available on the database (Extra ram). But it looks like it's OK for now.
Regards Pete

Connection pooling problem in TopLink with JBoss4.0.3

Hi All
I am using JBoss4.0.3SP1 with TopLink-10g(9.0.4.5) and Sybase as database. I am implementing connection pooling of JBoss with Sybase. I have done all the changes in JBoss mapping files.
Now to enable connection pooling in TopLink I have set the <uses-external-connection-pooling> attribute in sessions.xml file to true and I have added <datasource> attribute corresponding to the datasource defined in JBoss. It is working fine but when I delete the username, password...etc attribute from the sessions.xml then I am not able to get the session from datasource.
Can anyone tell me what to do or where I am making mistake? Any help on this will be appreciated

I tried that code also but the project object that I am getting is null which is in this line
DatabaseLogin login = (DatabaseLogin)mySession.getProject().getLogin();
mySession is an object of oracle.toplink.sessions.Session interface but when I call this method then it returns me a null object of Project class, so I am getting NullPointerException error. I tried to do this stuff by many ways but I am always getting the NullPointereException in setLogin() method of Session. This is the stackTrace of the error.....
java.lang.NullPointerException
at oracle.toplink.publicinterface.Session.setLogin(Session.java:2871)
at com.test.TestCon.executeQurey(TestCon.java:91)
at org.apache.jsp.Test_jsp._jspService(org.apache.jsp.Test_jsp:55)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Unknown Source)
Can you please tell me where I am wrong or any other way to do fix this problem.

What about session memory when using BEA Weblogic connection pooling?

Hi,
consider a web application, allowing database connections via a BEA Weblogic 8.1 application server. The app-server is pooling the oracle connections. The oracle database is running in dedicated server mode.
How are the database requests from the web app served by the connection pool from BEA?
1) Does one oracle session serve more than one request simultanously?
2) Does BEA serialize the requests, which means, that a session from the pool is always serving only one request at a time?
If (1) is true, than what about the session memory of Oracle sessions? I understand, that things like package global variables are beeing stored in this session private memory. If (1) is true, the PL/SQL programmer has the same situation, as with programming an Oracle databas in "shared server" mode, that is, he should not use package global variables etc.
Thankful for any ideas...
Message was edited by:
Xenofon

Xenofon Grigoriadis wrote:
Hi,
consider a web application, using BEA between client and an Oracle Database (v9i). BEA is pooling the oracle connections. The oracle database is running in dedicated server mode.
How are the database requests from the web app beeing served by the connection pool from BEA?
1) Does one oracle session serve more than one request simultanously?no.
2) Or does BEA serialize the requests, which means, that a session from the pool is always serving only one request at a time?
Reading "Configuring and Using WebLogic JDBC" from weblogic8.1 documentation, I read:
"... Your application "borrows" a connection from the pool, uses it, then returns it to the pool by closing it...."
What do you mean by returning the connection by closing it? Tbe server will either return the connection to the pool or close it...When application code does typical jdbc code, it obtains
a connection via a WebLogic DataSource, which reserves an
unused pooled connection and passes it (transparently wrapped)
to the application. The application uses it, and then closes
it. WebLogic intercepts the close() call via the wrapper, and
puts the DBMS connection back into the WebLogic pool.
The reason, why I as an Oracle programmer ask this is, because every session (=connection)
in Oracle has its own dedicate, private memory for things like global PL/SQL variables.
Now I want to figure out, if you have to careful in programming your databases, when
one Oracle session (=connection) is serving many weblogic requests.It is serving many requests, but always serially. Do note however, that we
also transparently cache/pool prepared and callable statements with the
connection so repeat uses of the connection will be able to get already-made
statements when they call prepareStatement() and prepareCall(). These
long-lived statements will each require a DBMS-side cursor.
>
Thankful for any ideas or practical experience...
Message was edited by:
mk637Joe

Database connection pooling in ADF causing db procedure calls to use different transaction or session

We have developed an application using JDev Version 11.1.2.1.0 and the database is oracle 11g EE.
We have many database procedures or function calls from the model (AMImpl.java, VORowImpl.java) and the commit does not happen in the database and it happens from ADF. The database procedures are called in some valueChangeListnener and these procedures use the same transaction or session database session when called and update some records in some tables that are displayed in pages.
We started using connection pooling recently in our ADF application, -Djbo.doconnectionpooling=true -Djbo.txn.disconnect_level=1. When using connection pooling, we noticed that the database procedure calls use a different trasanction or different database session and the data or records that these procedures update is lost.
After removing the connection pooling, we noticed that the procedures again started using the same transaction or same database session and was working fine.
I want to know why this connnection pooling caused this issue and is there any fix for this when using connection pooling?

Take a look at
http://docs.oracle.com/cd/E15523_01/web.1111/b31974/bcampool.htm#CIHCHHEA
What You May Need to Know About Database User State and jbo.doconnectionpooling = true
As you can see:
"At the end of the request when the application module is released back to the application module pool, that application module pool releases the JDBC connection it was using back to the database connection pool. It follows that with jbo.doconnectionpooling set to true the application module instance in the pool may have a completely different JDBC connection each time you check it out of the pool"
So, the best you can do, is to revert jbo.doconnectionpooling to false.

Obtaining an oracle.sql.STRUCT through a pooled JDBC connection

Hello,
I am using WebLogic Server 10 and and Oracle 10 and I am trying to obtain a vendor-specific oracle.sql.STRUCT from a ResultSet using a pooled connection defined in Weblogic. I need the vendor-specific object, rather than simply the java.sql.Struct implementation, because a third party library requires it.
What gets returned in the ResultSet is a non-exposed WebLogic wrapper object which implements java.sql.Struct, but which cannot be cast to an oracle.sql.STRUCT. I can use reflection on this object to find and call the getVendorObj() method to obtain the oracle.sql.STRUCT, but this solution is not acceptable because this is not a published API and is not guaranteed not to change in future versions.
How can I reliably obtain a vendor-specific implementation of java.sql.Struct through a WebLogic connection pool in WebLogic Server 10?
Thanks for any advice,
-Dan Schwemlein

dan schwemlein wrote:
Joe,
Thanks again. With your guidance, I have arrived at the following approach, which I'll post for the benefit of others, and which I'd be thankful if you would validate:
1) Import the jar com.bea.core.datasource-1.0.0.0.jar from %BEA_HOME%\modules, which is the only location of the class WLConnection, which is the only class with the getVendorConnection() method you refer to.
2) Get the logical connection from the pooled data source, cast it to a WLConnection, call getVendorConnection() to obtain an OracleConnection (from the ojdbc jar), and use this connection to obtain the required oracle.sql.STRUCT from an OracleResultSet.
3) Be aware of the limitations and follow the guidelines in the document http://e-docs.bea.com/wls/docs81/jdbc/thirdparty.html#1043646 regarding security, error handling, releasing resources (close only the logical connection), etc.
Does this sound like the approach you had in mind?
Thanks again,
-Danyes.
Joe
>
Re: Obtaining an oracle.sql.STRUCT through a pooled JDBC connection
Posted: Jul 16, 2007 3:21 PM
dan schwemlein wrote:
Thanks for the quick response!I was working today...
Thank you for the information about the connection being closed.
I will look into using this configuration setting.
You say that you can describe a way to get a handle on an unwrapped
pool object using some documented WLS-specific code. Are you referring
here to the getVendorConnection() method?yes.
This method does not help me
get the oracle.sql.STRUCT object, because even the connection returned
by getVendorConnection() returns a wrapped WL java.sql.Struct object
from a call to getObject().I don't believe it. If you are running in WLS, with a local pool,
the getVendorConnection() will give you the Oracle connection,
which will give you an Oracle statement, etc, down to an oracle
STRUCT object. Once you have a direct reference to the oracle connection,
we're not in the picture when it returns something to you.
It would be great if getVendorObj() were
documented and could be counted on in future versions. To use this
method, one would still have to access it via Java reflection, because
the wrapper class and its getVendorObj() method would be exposed in an
API, correct? Could this method be exposed in the API, so that reflection
doesn't need to be used, or it is exposed somewhere that isn't documented?getVendorObj() is not yet exposed or therefore supported for the general
wrapped object, so you would have to start from the connection and
derive all subobjects from it.
Thanks again,
-Dan Schwemlein
Hello,
I am using WebLogic Server 10 and and Oracle 10 and I am trying to obtain a
vendor-specific oracle.sql.STRUCT from a ResultSet using a pooled connection
defined in Weblogic. I need the vendor-specific object, rather than simply
the java.sql.Struct implementation, because a third party library requires it.
What gets returned in the ResultSet is a non-exposed WebLogic wrapper object
which implements java.sql.Struct, but which cannot be cast to an oracle.sql.STRUCT.
I can use reflection on this object to find and call the getVendorObj() method to
obtain the oracle.sql.STRUCT, but this solution is not acceptable because this is
not a published API and is not guaranteed not to change in future versions.Understood. We all benefit from sticking to the J2EE standards,
but we could also wish Oracle had done so with it's driver objects.
I will assume your code is running in the WebLogic server, because
an external JVM can never access the real driver object, which will
always really be in the WLS JVM. No active JDBC object is serializable.
How can I reliably obtain a vendor-specific implementation of java.sql.Struct
through a WebLogic connection pool in WebLogic Server 10?There is no way to get a handle on an unwrapped pool object without using some
WLS-specific code, though I can describe a way with documented methods,
and/or I can get our documentation altered to say we'll support the
getVendorObj() method. We introspect every vendor object, and for those
implementations that have done the wise thing, projecting any non-standard
methods as an Interface, we are able to also project that Interface so
the vndor example code should work. However, in some poorly-done
cases, such as for some Oracle stuff, there is either no Interface,
or the Oracle code has extensions that take java.sql objects as input,
(at least that's the signature of the method) but two lines into the
method, the Oracle code assumes and casts the java.sql object to a concrete
Oracle object. In these use cases you need the direct unwrapped object.
We provide and document Connection.getVendorConnection(), and intend
getVendorObj() to serve the same for subobjects, but note the dangers
and responsibilities: We rely on our wrappers to implement the security
and thread-safety of our pooling system. Because user code can get
unrestricted access to the actual connection from most JDBC objects,
we can never trust that we have complete control once a vendor object
is exposed. Therefore, by default we will close and replace every JDBC
connection so exposed, as soon as the current thread is finished with
the pool connection. This hurts performance. We also document a pool
config setting that will tell us that you take responsibility for any such
problems, and not to close connections just because they've been exposed.
HTH,
Joe
Thanks for any advice,
-Dan Schwemlein

Tracing individual session from connection pool

Dear all,
DB : 10.2.0.4.0 (RAC)
Solaris 5.10
Application : Oracle SOA 10.1.3
We have CRM application deployed in SOA which inturns connects to RAC DB for data.All the
connections from SOA comes through a connection pool to the DB. Now, is there any way I can able to trace a individual session coming form this connection pool ?
Please guide ?
Kai

You have a couple of options as far as I know:
1. If you are using a Client Identifier that is granular enough to identify a particular user you can enable tracing at that level.
2. You could try and capture the particular SID and SERIAL# for the session and enable tracing that way.
The [DBMS_MONITOR|http://download-west.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_monitor.htm#i1003679] package provides the interface to enable tracing.
HTH!

Connection pooling & multiple apps in single instance - many sessions

Any feedback would be much appreciated from anyone with experience already with this situation and/or can provide some insight on this:
Adhering to the trend of consolidating instances, we have a single consolidated instance with multiple apps. With connection pooling (we use apache & mod_perl), I suppose you have an option of creating some oracle db accounts that can be shared among multiple apps - that benefits you in reducing the numbers of total pooled db connections to the instance - but one very big drawback is that you have some apps, if sharing generic db userids, having access to tables they have no need to access.
On another hand, you have the option (which is the approach we've taken thus far and, in my view, is definitely the way to go) of a distinct oracle account for each app - on the downside, that could produce many more total db sessions (& os processes) on the server as each new set of unique persistent pooled connections are created - but it benefits you in terms of security - which has a lot of weight - since each app account only has access to what it needs & nothing beyond that (the "least privilege" concept).
We're not an "amazon.com" so we haven't had to deal with thousands of sessions within an instance so there's an element of the unknown here for us - some questions I have are: How can I accurately predict how many db sessions (& os processes) this particular solaris server can support? I realize kernel parameters need to be set high enough for this sort of environment but simply setting the parameters cannot be a true indication of what the server can support. How much memory is required for thousands of sessions? I'm trying to gauge how many sessions & processes we can currently support - and at what point we'll need additional memory, or an updated server, or at what point we need to start thinking about an additional server environment for new apps.
I realize connection pooling is, by it nature, reducing the overall sessions required but as each unique db account is created, there will be set of persistent sessions out there and that will grow.
Also if you have any insight on other things to think about when heading into the direction of lots of sessions (beyond kernel settings, other OS or db parameters that need to be reviewed, or some features to enable).
I'm rambling so I'll stop right there; sorry about the length of the post. It's possible that the things to look at and consider are pretty straight-forward.
Thanks in advance for any feedback on any of the above.
-Rick Papaj
[email protected]

You better check the documentation available on OTN
http://download-west.oracle.com/docs/cd/B25221_03/web.1013/b14432/threadpool.htm
There are several options you can setup with pooling.
hope this helps.

Session Connection Pooling

Hi,
How can I find / set the size of the session connection pool?
Thank you.
Martin

Martin,
as Joel already mentioned, if you are looking for restricting the number of database sessions if depends on the operating system/database.
Have a look at http://download.oracle.com/docs/cd/A97336_01/comm.102/a87562/apptroub.htm#631218
It's from an older application server documentation and explains what Joel has written about process-oriented/threads architecture.
Regards
Patrick
My APEX Blog: http://inside-apex.blogspot.com
The ApexLib Framework: http://apexlib.sourceforge.net
The APEX Builder Plugin: http://sourceforge.net/projects/apexplugin/

A strang problem about Resin database connection pool

I am a beginner，hope somebody can help me.
my web site occured a strange problem after I used the Resin database connection pool instead of
connecting directly
the error message as follows:java.lang.IllegalArgumentException: Request cannot be null
at javax.servlet.ServletRequestWrapper.<init>(ServletRequestWrapper.java:100)
at javax.servlet.http.HttpServletRequestWrapper.<init>(HttpServletRequestWrapper.java:92)
at com.caucho.server.connection.RequestAdapter.<init>(RequestAdapter.java:96)
at com.caucho.server.webapp.DispatchRequest.<init>(DispatchRequest.java:97)
at com.caucho.server.webapp.IncludeDispatchRequest.<init>(IncludeDispatchRequest.java:77)
at com.caucho.server.webapp.IncludeDispatchRequest.createDispatch(IncludeDispatchRequest.java:87)
at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:389)
at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:345)
at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:807)
at _jsp._intro__jsp._jspService(/intro.jsp:60)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.pageservice(Page.java:571)
at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:155)
at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:211)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:177)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:221)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:263)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:331)
at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:464)
at com.caucho.util.ThreadPool.run(ThreadPool.java:408)
at java.lang.Thread.run(Thread.java:595)


<resin xmlns="http://caucho.com/ns/resin"
xmlns:resin="http://caucho.com/ns/resin/core">

<log name='' level='info' path='stdout:' timestamp='[%H:%M:%S.%s] '/>
<log name='com.caucho.java' level='config' path='stdout:'
timestamp='[%H:%M:%S.%s] '/>
<log name='com.caucho.loader' level='config' path='stdout:'
timestamp='[%H:%M:%S.%s] '/>

<dependency-check-interval>2s</dependency-check-interval>

<javac compiler="internal" args=""/>



<thread-pool>

<thread-max>128</thread-max>

<spare-thread-min>25</spare-thread-min>
</thread-pool>

<min-free-memory>1M</min-free-memory>
<server>

<class-loader>
<tree-loader path="$resin-home/lib"/>
</class-loader>

<keepalive-max>500</keepalive-max>
<keepalive-timeout>120s</keepalive-timeout>

<http server-id="" host="*" port="8080"/>


<cluster>
<srun server-id="" host="127.0.0.1" port="6802" index="1"/>
</cluster>

<ignore-client-disconnect>true</ignore-client-disconnect>

<cache path="cache" memory-size="10M"/>

<ping>

</ping>

<web-app-default>

<cache-mapping url-pattern="/" expires="5s"/>
<cache-mapping url-pattern="*.gif" expires="60s"/>
<cache-mapping url-pattern="*.jpg" expires="60s"/>

<servlet servlet-name="directory"
servlet-class="com.caucho.servlets.DirectoryServlet"/>
</web-app-default>

<database>
<jndi-name>jdbc/artunion</jndi-name>
<driver type="org.gjt.mm.mysql.Driver">
<url>jdbc:mysql://localhost:3306/union</url>
<user>as</user>
<password>as</password>
</driver>
<prepared-statement-cache-size>8</prepared-statement-cache-size>
<max-connections>20</max-connections>
<max-idle-time>30s</max-idle-time>
</database>

<host-default>
<class-loader>
<compiling-loader path='webapps/WEB-INF/classes'/>
<library-loader path='webapps/WEB-INF/lib'/>
</class-loader>

<access-log path='logs/access.log'
format='%h %l %u %t "%r" %s %b "%{Referer}i" "%{User-Agent}i"'
rollover-period='1W'/>

<web-app-deploy path='webapps'/>

<ear-deploy path='deploy'>
<ear-default>

</ear-default>
</ear-deploy>

<resource-deploy path='deploy'/>

<web-app-deploy path='deploy'/>
</host-default>

<resin:import path="${resinHome}/conf/app-default.xml"/>

<host id=''>
<document-directory>D:/artunion</document-directory>

<web-app id='/'>

<class-loader>
<simple-loader path="$host-root/xsl"/>
</class-loader>
<servlet-mapping url-pattern="/servlet/*" servlet-name="invoker"/>
</web-app>
</host>
</server>
</resin>
Thank you!

Info about AD Domain Controller to which I'm connected

Hi,
Is there a way to find the AD Domain Controller to which I'm connected ?
Some time I find the info in these file :
/Library/Preferences/OpenDirectory/DynamicData/Active Directory/<MYDOMAIN>.plist
under 'last used server' but this field is not always populated..
Is there any other place where find or some command to use ?? (or even more info about the previous plist file and how is created/populated.. i have several Macsac on same domain but not all computers have the file populated in the same way..)
Any help appreciated
Thanks
m.

Some added toolbar and anti-virus add-ons are known to cause
Firefox issues. '''Disable All of them.'''
Type '''about:preferences#advanced'''<Enter> in the address bar.
Under '''Advanced,''' Select '''Network.'''
Look for '''Configure How Firefox Connects''' and press the '''Settings''' button.
Check the settings.
Some problems occurs when your Internet security program was set
to trust the previous version of Firefox, but no longer recognizes your
updated version as trusted. Now how to fix the problem: To allow
Firefox to connect to the Internet again;
* Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
* Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see
'''[https://support.mozilla.org/en-US/kb/configure-firewalls-so-firefox-can-access-internet Configure firewalls so that Firefox can access the Internet.]''' {web link}

Pls help about Rollback and Connection Pooling

Hello Friends.
I have some problems abount Rollback & ConnectionPooling.
If connection pooling is possible with rollback facility??????
I am giving my code below so pls guide me- i am using MySql and J2EE 1.3.
try
/*          Setting auto commit off          */
con.setAutoCommit(false);
affectedRow = myStatement.executeUpdate(String qury1);
affectedRow = myStatement.executeUpdate(String qury2);
affectedRow = myStatement.executeUpdate(String qury3);
con.commit();
}catch(SQLException sqle){
                    try{
                         con.rollback();
                    }catch(Exception e){e.printStackTrace();}
}finally {
     saveFlg=false;
     try {
          if(myStatement!=null)
          myStatement.close();
     }catch(Exception e){e.printStackTrace();}
}// finally block complete...
/* Sample Code Ends*/
Thanks in advance and Happy New Year

If connection pooling is possible with rollback facility??????Should be, sure. What problem do you have with it?
I know very little about MySQL, but I understand it is somewhat "special". Do you have a version of MySQL that has transaction support? Check the MySQL docs: is there some configuration you need to do to enable transactions?

Can anyone tell me about Connection Pools???

Hi,
Is there a freely downloadable Connection Pool implementation available on the net? I need it specifically for Oracle databases... This is for a prod environment and am looking for a stable implementation... Any good information/links is most appreciated.
Thanks
Prowzen

Hi,
I actually implemented it long time back. This is a best case to implement the Singleton Pattern. Just to give an idea, here is how it goes. I'll try to post the code too but cannot guarantee it right now.
Basically the Pool information like the database, userid, password, SID etc. should be configurable through a properties file as you are saying that it is a production environment.
1. Implement your Connection Pool as a Singleton class that has methods like init, getConnection, releaseConnection, createConnection etc. Have private member - a java.util.Vector of java.sql.Connection objects.
2. Anyone who wants to use the connection pool gets an instance with the getInstance method which will call init method.
3. The init should read the properties file and get the necessary details. Then create required number of connections and put them in the Vector of connections (pool). You are good to go now. Ideally this should all be done at the startup of the whole Application.
4. Each client will call the getConnection method of the Singleton. The getConnection should Synchronize the Vector and remove the connection at index 0 of the pool (vector) and return it.
i.e. public java.sql.Connection getConnection ()
//wait until someone notifies me after returning a connection back to the pool
if(connectionPool_.size() == 0)
wait();
Connection con = null;
synchronized(connectionPool_)
con = (Connection)connectionPool_.elementAt(0);
connectionPool_.removeElementAt(0);
return con;
5. Each client SHOULD call the releaseConnection method of the Singleton once it is done using the connection. The releaseConnection should Synchronize the Vector and add the connection back to the pool.
So, basically the connections in the pool will be used in a Round-Robin Fashion.
i.e. public void releaseConnection (java.util.Connection con)
connectionPool_.addElement(con);
//Notify all the waiting Clients. Let JVM decide who gets the connection.
notifyAll();
return con;
This is the core logic of what I had written. But there are lot of other cases that you need to consider to write robust code like Lost Connections, when you need to throw that connection away from the pool and add a new one. This is more so significant in busy databases configured to timeout inactive connections. I used to have a low priority thread kicked off at the start along with this main pool that would wake up around 4 or 5 in the night and replenish all the connections in the pool so that it will be good to go for one more day before it gets replenished again. Of course, in such a case, the clients have to have a retry mechanism in case you don't respond in reasonable amount of time while replenishing the connection pool.
Hope this helps.
Amar.

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