Problem i loading jdbc connections , in JBOSS

In my jboss , when i deploy and run my project, i am getting login page and when i give my uid and pwd and submit data, its throwing exception saying connectivity is not present.
but when i refresh the same page and resend the data again its getting connected to db and getting validated.
jboss version-jboss-4.0.3SP1
ds.xml(located in deploy folder of jboss)
<local-tx-datasource>
<jndi-name>awpds</jndi-name>
<connection-url>jdbc racle:thin:@3.137.168.136:1529 EVCMA</connection-url>
<driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
<user-name>CMADBA</user-name>
<password>devcma321#</password>
<min-pool-size>5</min-pool-size>
<max-pool-size>200</max-pool-size>
<idle-timeout-minutes>30</idle-timeout-minutes>
<new-connection-sql>select sysdate from dual</new-connection-sql>
<check-valid-connection-sql>select sysdate from dual</check-valid-connection-sql>
</local-tx-datasource>
please let me know if there is any configuration or settings i need to do in my jboss or project

You forget to copypaste the exception and the trace here. They contain the most important information about the problem.

Similar Messages

Beginner Has Problem With Loading JDBC Driver Using MySQL

Hi, I am having problem with loading JDBC driver, and need your diagnotic help.
1. I have installed MySQL (C:\mysql), created a databse (soup), and created a littel table (VIDEOS). I am able to see the table in the console:
sql> select * from videos
2. I have downloaded the latest version of Connector/J (mysql-connector-java-3.1.0-alpha.zip), and unzip the zip file into my C:\ directory.
3. I copied the mysql-connector-java-3.1.0-alpha-bin.jar to the C:\j2sdk1.4.1_02\jre\lib\ext folder and it is in my CLASSPATH
4. MySQL server is running
C:\> C:\mysql\bin\mysqld-nt --standalone
5. open another DOS window and use the database
mysql>USE SOUP
6. succesfully compiled a Java program (javac Test.java):
import java.sql.* ;
public class Test
public static void main( String[] args )
try
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
try
Connection con = DriverManager.getConnection( "jdbc:mysql://localhost:3306/soup" );
try
Statement statement = con.createStatement();
ResultSet rs = statement.executeQuery("SELECT TITLE FROM VIDEOS");
while ( rs.next() )
System.out.println( rs.getString( "TITLE" ) );
rs.close();
statement.close();
catch ( SQLException e )
System.out.println( "JDBC error: " + e );
finally
con.close();
catch( SQLException e )
System.out.println( "could not get JDBC connection: " + e );
catch( Exception e )
System.out.println( "could not load JDBC driver: " + e );
7. when I run the Java program (java Test), I got
the message:
could not load JDBC driver: java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver
What am I missing?

Hi,
I missed to specify test in my last post.
Try running your program by explicitly setting the classspath when
running your program . java -classpath c:\mysql-connector-java-3.1.0-alpha-bin.jar test
Make sure your jar file contains org.gjt.mm.mysql.Driver class

Language problem with my jdbc connection

Hello,
i'm having a problem with my jdbc connection.
the problem is that i'm connecting to MS- Access db the have arabic tables, and columns, it was working fine on a windows XP environment prepared for arabic language, but when i had to move to windows vista it did not work and it gave me an exception.
i'm using netbeans 6.1 IDE, and the exception is
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver]COUNT field incorrect
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6957)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7114)
at sun.jdbc.odbc.JdbcOdbc.SQLExecDirect(JdbcOdbc.java:3110)
at sun.jdbc.odbc.JdbcOdbcStatement.execute(JdbcOdbcStatement.java:338)
when i printed the select statement and the exception it gave me:
SELECT [??? ???????], [??? ??????], [??? ?????], [??? ?????], [????? ???????????] FROM EDU_DIVISION; [Microsoft][ODBC Microsoft Access Driver]COUNT field incorrect.
the question marks are very weird to appear!!!!!!
here is the code:
public void edu_branch() {
        sucpy = 0;
        eflag = 0;
        asql = "SELECT [\u0643\u0648\u062F \u0627\u0644\u062C\u0627\u0645\u0639\u0629], [\u0643\u0648\u062F \u0627\u0644\u0643\u0644\u064A\u0629], [\u0643\u0648\u062F \u0627\u0644\u0642\u0633\u0645], [\u0643\u0648\u062F \u0627\u0644\u0634\u0639\u0628\u0629], [\u0627\u0633\u0645 \u0627\u0644\u0634\u0639\u0628\u0629], [\u0627\u0633\u0645 \u0627\u0644\u0634\u0639\u0628\u0629 \u0628\u0627\u0644\u0627\u0646\u062C\u0644\u064A\u0632\u064A\u0629], [\u0627\u0644\u0643\u0648\u062F \u0627\u0644\u0645\u062E\u062A\u0635\u0631] FROM EDU_BRANCH;";
        Connection connection;
        Statement statement;
        try {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            connection = DriverManager.getConnection("jdbc:odbc:info");
            System.out.println("Connection to Access file is created...");
            statement = connection.createStatement();
            statement.execute(asql);
            System.out.println("Executing query : " + asql);
            aset = statement.getResultSet();
            if (aset != null) {
//------------------------------Oracle operations--------------------------------------------------------------------
                while (aset.next()) {
    can you help me please

arabic language
SELECT [??? ???????], [??? ??????], [??? ?????], [??? ?????], [????? ???????????] FROM EDU_DIVISION; >[Microsoft][ODBC Microsoft Access Driver]COUNT field incorrect.
the question marks are very weird to appear!!!!!!It failed to understand your unicode sql.
it was working fine on a windows XP environment prepared for arabic language, but when i had to move to windows vista it did not workStrange. Maybe you need to compare the differences of some system properties on both hosts, for instance, sun.io.unicode.encoding, file.encoding, user.region, and so on.

Xa-problems when releasing jdbc connection

We have a very strange problem with our WL setup.
Weblogic 8.1.4 (2 cluster nodes)
Oracle 9i stand alone db (although tested on RAC with 2 nodes)
The application architecture is quite complicated, with several EJB-applications that communicate via JMS and RMI. Everything (except logging) runs under xa-transactions that span multiple applications. We use both xa (for everything but logging) and non-xa jdbc connection pools (Oracle thin driver).
When we release a jdbc connection then the following node manager log entry is written:
<Mar 13, 2006 11:11:02 AM UTC> <Error> <JDBC> <BEA-001112> <Test "SELECT 1 FROM DUAL" set up for pool "myPoolXA" failed with exception: "oracle.jdbc.xa.OracleXAException".>
<Mar 13, 2006 11:11:02 AM UTC> <Error> <JDBC> <BEA-001035> <The following error has occured: XA operation failed : java.lang.NullPointerException
at weblogic.jdbc.wrapper.VendorXAResource.rollback(VendorXAResource.java:78)
at weblogic.jdbc.jta.DataSource.rollback(DataSource.java:1047)
at weblogic.transaction.internal.XAServerResourceInfo.rollback(XAServerResourceInfo.java:1358)
at weblogic.transaction.internal.XAServerResourceInfo.rollback(XAServerResourceInfo.java:687)
at weblogic.transaction.internal.ServerSCInfo.startRollback(ServerSCInfo.java:729)
at weblogic.transaction.internal.ServerTransactionImpl.localRollback(ServerTransactionImpl.java:1909)
at weblogic.transaction.internal.ServerTransactionImpl.globalRollback(ServerTransactionImpl.java:2592)
at weblogic.transaction.internal.ServerTransactionImpl.internalRollback(ServerTransactionImpl.java:385)
at weblogic.transaction.internal.ServerTransactionImpl.rollback(ServerTransactionImpl.java:364)
at weblogic.ejb20.internal.BaseEJBObject.postInvoke(BaseEJBObject.java:279)
at weblogic.ejb20.internal.StatelessEJBObject.postInvoke(StatelessEJBObject.java:140)
at com.xx.myapp.ejb.MessageMgmt_s1i1u8_EOImpl.processMessage(MessageMgmt_s1i1u8_EOImpl.java:56)
at com.xx.myapp.ejb.MessageMgmt_s1i1u8_EOImpl_CBV.processMessage(Unknown Source)
at com.xx.myapp.ejb.TextMessageReceiverBean.onMessage(TextMessageReceiverBean.java:120)
at weblogic.ejb20.internal.MDListener.execute(MDListener.java:370)
at weblogic.ejb20.internal.MDListener.onMessage(MDListener.java:262)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:2678)
at weblogic.jms.client.JMSSession.execute(JMSSession.java:2598)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
As we understand the message this means that the jdbc resource wrapper crashes with a NPE.
Are there any hints on this situation ?
Regards
Nikolaus Rumm

Additional information:
We use Hibernate as the persistence layer. The problem arises when the application detects a business problem and calls setRollbackOnly() on the session bean's ejb context, followed by a "throw ApplicationException" (extends java.lang.Exception).
When we use unchecked exceptions for business exceptions (which violates the EJB spec) everything works fine.

ResultSet problem with a jdbc connection pool implementation

Hi
I'm trying to use jdbc connection pool in my java application (js2e 1.4.0_01)
from the example at http://www.developer.com/tech/article.php/626141
In my main() code, in addition to JDBCConnection, JDBCConnectionImpl and JDBCPool classes, i use
JDBCConnection conn;
conn = new JDBCConnection(dbName);
// make a statement
sqlString = "SELECT........."
ResultSet rs = null;
rs = conn.sendRequest(sqlString, rs);
// print result
while (rs.next()) {
Unfortunately i get an error like "ResultSet is closed" in the line corresponding to rs.next. The error disappears if i remove the line
stmt.close();
in the method sendRequest of the JDBCConnectionImpl class.
1) Does anybody knows the solution?
2) How to close all connections?
Thanks you in advance.

Hi ,
You are closing the statement and then trying to use resultset , which is not going to work .So close then statment after using resultset .Ideally the code should be like this
try {
conn = // get the connection
pstmt = conn.prepareStatement(sql);
rs = pstmt.executeQuery();
while ( rs.next()){
// do something
catch (Exception ex) {
finally {
try {
if (rs != null)
rs.close();
if (pstmt != null)
pstmt.close();
if(conn!=null )
conn.close();

Problem in getting jdbc connection with oracle for win 98

This is my code given below
import java.sql.*;
public class Oconnection
Connection conn;
Statement st;
PreparedStatement pst,pstissue,pstret,pstbook;
public Oconnection()
try
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","manager");
catch(Exception ex)
System.out.println(ex.getMessage());
ex.printStackTrace();
public static void main(String args[])
new Oconnection();
*****************************************************8
Error
C:\Library>java Oconnection
Io exception: The Network Adapter could not establish the connection
java.sql.SQLException: Io exception: The Network Adapter could not establish the
connection
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:169)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:211)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:324)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:266)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja
va:365)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:260)
at java.sql.DriverManager.getConnection(DriverManager.java:517)
at java.sql.DriverManager.getConnection(DriverManager.java:177)
at Oconnection.<init>(Oconnection.java:17)
at Oconnection.main(Oconnection.java:39)
I am using Oracle for win95 or i think it is oarcleforwin98 .
The sid of my database i found through query given was orcl, what changes should i do in the code so that it works.
should i use another driver coz i am using latest driver from oracle.com which is for oracle 8i. if a need a driver change where can i download it from please help me

http://forum.java.sun.com/thread.jsp?thread=291584&forum=48&message=1305045

Jdbc connection leak problem in wls 8.1 sp1

Fellows!
I have problem finding a jdbc connection leak and hope to get some tips from
a som friendly person who has some experience about this.
The application contains some 100 classes and CMP beans.
All connections are fetched with datasource.getConnection and are realesed
in finally() immediately after the sql-query is done.
Except for the entity beans of course which has the transaction required
attribute set.
Any ideas much appreciated!
Best regards from the top of Europe - Luleå.
Here the first snow has been falling and thin ice has freezed on the gulf of
bothnia.
Stefan

Stefan Johansson wrote:
Fellows!
I have problem finding a jdbc connection leak and hope to get some tips from
a som friendly person who has some experience about this.
The application contains some 100 classes and CMP beans.
All connections are fetched with datasource.getConnection and are realesed
in finally() immediately after the sql-query is done.
Except for the entity beans of course which has the transaction required
attribute set.Hi. I don't understand this last 'except'. All jdbc code in bean methods
should be defining a connection as a method variable, obtaining it from
a TxDataSource in a try block, used completely, and closed as the only/first
thing in the finally block. We will handle the close() correctly, it won't
hurt the tx if there is one, and it will do the right thing if there isn't one.
How do you know there's a leak? Usually our leak-detection shows where the connection
was made, so you can find out why it wasn't closed...
Joe
>
Any ideas much appreciated!
Best regards from the top of Europe - Luleå.
Here the first snow has been falling and thin ice has freezed on the gulf of
bothnia.
Stefan

WLS 10.3 ClassCastException obtaining JDBC connection

I have a problem obtaining a JDBC connection in a java client application, using a WLS Datasource.
- I've configured a JDBC datasource in a WLS 10.3 instance, using the Oracle thin driver (not the XA version) - and have successfully targetted this to my server and tested the connection via the console.
- When viewing the JNDI Tree for the server, the Datasource is visible as expected.
However, when I attempt to use a simple client program to obtain a datasource and JDBC connection I get the following error :
java.lang.ClassCastException : weblogic.jdbc.common.internal.ConnectionEnv cannot be cast to java.io.Serializable
Debugging shows a datasource is obtained and that the ClassCastException is thrown when an attempt is made to get a connection from the datasource. Note this code has been used successfully for previous WLS versions to obtain and test a connection (WLS 8.1 - WLS 10) and follows the expected steps :
Hashtable<String, String> ht = new Hashtable<String, String>();
ht.put( Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory" );
ht.put( Context.PROVIDER_URL, "t3://localhost:7001");
javax.naming.Context ctx = new InitialContext( ht );
ds = (javax.sql.DataSource) ctx.lookup( pDataSourceName );
Connection con = ds.getConnection();
The client app has the following Jars on the classpath :
wlclient.jar
jdk1.6.0_07 runtime jar
The client code has been built using jdk1.6.0_07
i) Can you confirm if any additional libraries are required on the classpath
ii) Please indicate if there are any special steps required to obtain a JDBC connection in WLS 10.3
Thanks for your help.
Edited by: user554713 on 23-Dec-2008 02:27

In a Java client the HashTable properties are required to be set.
Context ctx = null;
Hashtable ht = new Hashtable();
ht.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
ht.put(Context.PROVIDER_URL,         "t3://localhost:7001");
try {    ctx = new InitialContext(ht);
// Use the context in your program }
catch (NamingException e) {    // a failure occurred }
finally {    try {ctx.close();}    catch (Exception e)
{      // a failure occurred    } }Edited by: dvohra16 on Dec 10, 2009 5:39 PM

Single jdbc connection opens multiple connections to sql server

Hello!
I'm having a bad problem, because one jdbc connection opens multiple connections to the sql server. I'm working with the open source jdbc driver jtds and the ms sql server. Because I'm using temporary tables that are only visible to one database connection, my code doesn't work. Is this a bug in jtds or is this the normal behaviour of a java.sql.Connection?
Here a code example:
Class.forName("net.sourceforge.jtds.jdbc.Driver");
conn = DriverManager.getConnection(
"jdbc:jtds:sqlserver://"+dbConnDef.getServer()+"/"+dbConnDef.getDatabase(),
dbConnDef.getUserName(),
dbConnDef.getUserPasswd()
Statement stmt = conn.createStatement();
stmt.executeUpdate("SET DATEFORMAT YMD");
stmt.close();
stmt = conn.createStatement();
stmt.executeUpdate("CREATE TABLE #tmp (FieldA INT NOT NULL)");
stmt.close();
stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM #tmp");
stmt = conn.createStatement("SELECT FieldA AS sthElse FROM #tmp");
ResultSet rs2 = stmt.executeQuery("SELECT * FROM #tmp");
// the strange thing is, that this second query does NOT yet open a
// new connection, but the next sql command does.
stmt = conn.createStatement();
stmt.executeUpdate("DROP TABLE #tmp");
stmt.close();
Why is it behaving that strange way? It is absolutely necessary, that EVERYTHING that I do with my connection is really done on the same connection to the SQL server! How can I force a java.sql.Connection not to open multiple sql-server-connections?
It is very urgent, thus, PLEASE HELP!!!
Thousand thanks in advance! Marco.

...but that means, that the jdbc driver I use, is not working properly, because it should work the following way (please correct me, if I misunderstood the concept):
I create a Connection object which should represent exactly one physical connection to the database. Then I can create as many Statement instances by conn.createStatement() as I want. There should still exist only one physical connection.
With each of my Statement objects, I can create one result set.
This means, I should be able to create as many result sets as I want to with only one Connection object (and therefor one physical connection) by creating multiple Statements, right?!
If this is correct, the concept is perfect for me and exactly as I'm used to it by other programming languages. Then, only my jdbc driver does not work properly which means I either have to replace it by another one or change it myself (it's open source).

Understanding JDBC connections

Understanding JDBC connections
Hello,
I have problems with my JDBC connections, for example I restart de application server and then I view the log I found the next:
(I)
07/01/12 20:39:08 DataSource logwriter activated...
jdbc:oracle:thin:@sipol01:1521:orcl: Started
jdbc:oracle:thin:@sipol01:1521:orcl: Started
com.evermind.sql.OrionPooledDataSource@1b446d1: Started
07/01/12 20:39:08 DataSource logwriter activated...
jdbc:oracle:thin:@sipol01:1521:orcl: Started
jdbc:oracle:thin:@sipol01:1521:orcl: Started
com.evermind.sql.OrionPooledDataSource@ae533a: Started
07/01/12 20:39:09 DataSource logwriter activated...
jdbc:oracle:thin:@sipol01:1521:orcl: Started
jdbc:oracle:thin:@sipol01:1521:orcl: Started
com.evermind.sql.OrionPooledDataSource@9444d1: Started
07/01/12 20:39:09 DataSource logwriter activated...
jdbc:oracle:thin:@sipol01:1521:orcl: Started
jdbc:oracle:thin:@sipol01:1521:orcl: Started
com.evermind.sql.OrionPooledDataSource@61a907: Started
and then
(II)
Created new physical connection: com.evermind.sql.DriverManagerXAConnection@8420ae
null: Connection com.evermind.sql.DriverManagerXAConnection@8420ae allocated (Pool size: 0)
null: Releasing connection com.evermind.sql.DriverManagerXAConnection@8420ae to pool (Pool size: 1)
(III)
null: Releasing connection com.evermind.sql.DriverManagerXAConnection@324ff to pool (Pool size: 1)
null: Releasing connection com.evermind.sql.DriverManagerXAConnection@324ff to pool (Pool size: 1)
null: Releasing connection com.evermind.sql.DriverManagerXAConnection@324ff to pool (Pool size: 1)
And then..
(IV)
null: Releasing connection com.evermind.sql.DriverManagerXAConnection@5d5033 to pool (Pool size: 1)
com.evermind.sql.OrionCMTDataSource@fea539: Cache timeout, closing connection (Pool size: 0)
com.evermind.sql.OrionCMTDataSource@1145cc: Cache timeout, closing connection (Pool size: 0)
I have some questions about it:
1. Why OC4J open Pool connections and where you configure this value?
2. What is the mean of “serial” after OrionPooledDataSource@?
3. What is the mean of “serial” after DriverManagerXAConnection@?
4. What is the mean of “Releasing connection…” and why Release “324ff “ many times?? (Part III).
If the serial is the id of the connection..
5. When Cache timeout appears, I try to find in the log when the connection closing was open, but I didn’t find anything. What that means??
Thanks your help.
Jeanette

Okay, thanks John. Sorry for using the wrong forum.

Problem Loading JDBC Enabled JSP Page

Hi all, does anyone knows that's the case of this error:
This happened when I tried to access MySQL Database from remote client. I have no problem loading normal jsp file w/o JDBC Connection. Kind of confused on what is going on
Regards,
Joe
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: com.mysql.jdbc.Driver
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
     at java.lang.Thread.run(Thread.java:536)
root cause
javax.servlet.ServletException: com.mysql.jdbc.Driver
     at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:536)
     at org.apache.jsp.dbquery_jsp._jspService(dbquery_jsp.java:112)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
     at java.lang.Thread.run(Thread.java:536)
Apache Tomcat/4.1.24

Hi scsi-boy, first of all, thank you so much for your
prompt and fast response. So how do i tackle
ClassNotFoundException ?.i'm sorry coz i'm a newbie to
jsp. I hope by providing my configuration below could
aid you in understanding my problem.
I've place the setting config in /etc/profile with the
following:
JAVA_HOME=/usr/local/java
CATALINA_HOME=/usr/local/tomcat
ANT_HOME=/usr/local/ant
APACHE_HOME=/usr/local/apache
MYSQL_HOME=/usr/local/mysql
CLASSPATH=${CATALINA_HOME}/common/lib/servlet-api.jar:$
YSQL_HOME/connector/mysql_connector/mysql_connector-jav
-3.08-stable-bin.jar:${JAVA_HOME}/lib/tools.jar:${JAVA_
OME}/jre/lib/rt.jar:./
PATH=${PATH}:${JAVA_HOME}/bin:${ANT_HOME}/bin:
MANPATH=${JAVA_HOME}/man:${MANPATH}
export JAVA_HOME ANT_HOME APACHE_HOME MYSQL_HOME
CATALINA_HOME CLASSPATH PATH MANPATH
As you can see, i've un-tar mysql_connector in
/usr/local/mysql/connector directory and set my
classpath to point to that file. Is that the proper
way to do it?
Regards,
Joesorry not a JSP expert however just to clarify i am guessing that it is a ClassNotFoundException. it could be something else entirely and i don't really want to send you on a wild goose chase. we need to know what the root exception actually is.
i am off to sleep now but i'm sure if you can give a little more information which may involve figuring out how to get it to cough up more information someone will help you here.

Load balancing to JDBC connection pool

from http://e-docs.bea.com/wls/docs61///////cluster/overview.html
"WebLogic Server provides limited load balancing support for managing JDBC
connections in a cluster. If you create an identical JDBC DataSource in each
clustered WebLogic Server instance and configure those DataSources to use
different connection pools, the cluster can support load balancing for JDBC
connections. Note, however, that WebLogic Server provides no special load
balancing policies for accessing connection pools. If one of your connection
pools runs out of JDBC connections, the load balancing algorithm may still
direct connection requests to the empty pool."
How is this different from creating one connection pool with one datasource
and targetting the cluster. Are they talking about load-balancing to
different databases, or different servers in WLS. from a servlet or from a
client side app?
Can anyone elaborate?
Thanks in advance.

hi,
without knowing the entire set of requirements or the motivation behind doing this, a few words from me
this is usually done transparently to the applications server, that is having eg. Oracle instances mirroring eachother for extreme high-availability requirements.
1. I would have taken the liberty of calling this business funcionality and let my middleware do the implementation of this. The most elegant solution would probably be to call the master DB for the CUD operation, then post a message to a queue letting the slave DB be updated asynchronously. If the message could not be sent, throw an exception and have the entire operation rolled back.
If however this must happen realtime and transactions must be consistent, there are a few points to consider. And the quieing bit would not work.
if this is something that should be done for all Create, Update and Delete operations, an intercepting JDBC driver could do the trick. Although there are all sorts of different problems that could arise from this, for starters, at least one of the DBMS involved here should be XA compliant. If the entire transaction should be XA compliant, both DBMS must be XA compliant. Next as for the transaction towards the "mirroring" DBMS you would have to do all the transaction stuff your self.
For an example of an intercepting JDBC driver, I found thisone
http://media.datadirect.com/download/docs/jdbc/jdbcref/spy.html
I would guess that there are quite a few more.
- [url http://blog.thej2eestruggle.com]Anders Mathisen
Edited by anders.mathisen at 01/21/2007 2:53 PM

Problem in loading images when i am connected on company network

Hi friends, I am using firefox since last 4 months on my windows 8 pro laptop.but since last month I am facing problem in loading images when i am connected on company network but same time it is working fine with ie10. But all these thinks are working well at my home when I am using broadband.

I don't completely understand your issue. Does this issue occur on 1 network and does not occur on another? Have you tried clearing cache and cookies and making sure your plugins are up to date?
Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache.
Note: ''This will temporarily log you out of all sites you're logged in to.''
To clear cache and cookies do the following:
#Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
#Under "Time range to clear", select "Everything".
#Now, click the arrow next to Details to toggle the Details list active.
#From the details list, check ''Cache'' and ''Cookies'' and uncheck everything else.
#Now click the ''Clear now'' button.
Further information can be found in the [[Clear your cache, history and other personal information in Firefox]] article.
Did this fix your problems? Please report back to us!
Please check if all your plugins are up-to-date. To do this, go to the [http://mozilla.com/plugincheck Mozilla Plugin Check site].
Once you're there, the site will check if all your plugins have the latest versions.
If you see plugins in the list that have a yellow ''Update'' button or a red ''Update now'' button, please update these immediately.
To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.

Problem in jdbc connection to sql server

I hv some problem in connection. i am not sure hv to use this line of code. My server name is YC\YC and i m using window autentic usr name and passwd. How to i solve the problem? Thanks!
Connection connection = DriverManager.getConnection(
"jdbc:microsoft:sqlserver://<Host>:1433",<"UID>","<PWD>");

Is it means that add a new user?
Now i add a new user name "boon" passwd "abc123"
SQL service manager there state my server running is YC\YC, is it that one my server name and instance?
Connection connection = DriverManager.getConnection(
"jdbc:microsoft:sqlserver://YC\\YC:1433", "boon", "abc123");

Problem in jdbc connecting as sysdba

Dear ORACians,
i am using database 8.1.5 and jdbc 8.1.5 and jdk 1.5.
my problem: i want to connect to the database as sysdba through jdbc.
oracle is telling that to connect to the db as sysdba we have to use properties file. i did the same. It is connecting to the db as normal mode not as sysdba mode why???
Actual code is:
Properties conProp = new Properties();
          conProp.put("user", tf[2].getText());
          conProp.put("password", String.valueOf(cpwd.getPassword()));
          conProp.put("internal_logon", "SYSDBA");
try{
               DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
               String conUrl ="jdbc:oracle:thin:@"+tf[0].getText()+":"+tf[1].getText()+":"+tf[3].getText();
               conn=DriverManager.getConnection(conUrl,conProp);
               stat=conn.createStatement();
               JOptionPane.showMessageDialog(f,"Connection Estblished...");
               jdcn.dispose();
          }catch(Exception w){
               JOptionPane.showMessageDialog(f,String.valueOf(w));
i hope ORACians will guide me to develop my apps in proper direction.
urs
selvan

Thanks for ur reply but when i add "as sydba" with password property it gives error:
Properties conProp = new Properties();
conProp.put("user", tf[2].getText());
conProp.put("password", String.valueOf(cpwd.getPassword())+"AS SYSDBA");
the error is :
java.sql.SQLException: ORA-01017 invalid username/password; logon denied
selvan

Problem i loading jdbc connections , in JBOSS

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