Is Oracle JDBC driver thread safe

Is the Oracle JDBC driver thread safe?

Seems that this is not totally true.
We have a Problem with Oracle JDBC driver 9.2.0.5.0 (thin)
Using an IBM JDK 1.4
Szenario:
Thread 1 access to a CLOB via
ResulSet.getCharacterStream(int)
Thread 2 normal access via some select and
ResulSet.getString(int)
(Both using the same connection)
The following threads appear to be in a circular deadlock.
Further information can be found by looking in the Overall Thread Analysis
section of this tool.
Multi-threaded deadlock 1:
"Servlet.Engine.Transports : 6" of (sys:0x39778800) (TID:0x104590D0)
Holding Resource: oracle.jdbc.ttc7.TTC7Protocol@1ADEB358/1ADEB360
Thread Waiting: "ProcessNotificationTask" (sys:0x3C51FC18) (TID:0x103B4C40)
"ProcessNotificationTask" of (sys:0x3C51FC18) (TID:0x103B4C40)
Holding Resource: oracle.jdbc.driver.OracleConnection@1AE45160/1AE45168
Thread Waiting: "Servlet.Engine.Transports : 6" (sys:0x39778800) (TID:0x104590D0)
4XESTACKTRACE at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.java:2667)
4XESTACKTRACE at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2840)
4XESTACKTRACE at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:608)
4XESTACKTRACE at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:536)
4XESTACKTRACE at com.top_logic.knowledge.service.db.DBKnowledgeBase.getObjectsByAttribute(Unknown Source)
4XESTACKTRACE at oracle.jdbc.ttc7.TTC7Protocol.getLobChunkSize(TTC7Protocol.java:3050)
4XESTACKTRACE at oracle.sql.LobDBAccessImpl.getChunkSize(LobDBAccessImpl.java:687)
4XESTACKTRACE at oracle.sql.CLOB.getChunkSize(CLOB.java:692)
4XESTACKTRACE at oracle.sql.CLOB.getBufferSize(CLOB.java:717)
4XESTACKTRACE at oracle.sql.CLOB.getCharacterStream(CLOB.java:345)
4XESTACKTRACE at oracle.sql.CLOB.characterStreamValue(CLOB.java:1377)
4XESTACKTRACE at oracle.jdbc.driver.OracleStatement.getCharacterStreamValue(OracleStatement.java:5817)
4XESTACKTRACE at oracle.jdbc.driver.OracleResultSetImpl.getCharacterStream(OracleResultSetImpl.java:1230)
It seems that the access to the CLOB needs another,
internal SELECT to the Database and this way
TTC7Protocol and OracleConnection lock out each other.
This only happens on a true multiprocessor machine.
We tried to reprodcue it on a Single Processor
and some HyperThreading Machine but had no real sucess.
Now where can I sumbit this as a Bug ?

Similar Messages

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    ####<15/08/2002 14:09:43> <Error> <JDBC> <qawebmethods> <myserver>
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    >
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    <[WebAppServletContext(1412030,myapp,/myapp)] registering tunneling
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    "thorick" <[email protected]> wrote in message news:<[email protected]>...
    Most likely, the OCI libraries could not be loaded.
    Before continuing down this path, is there any reason
    why you want to use an OCI based Driver as opposed to the
    all Java Oracle thin driver ?There is indeed a valid reason for my choice.
    I am currently connecting to the Oracle "Rdb" 7.0 database (located on
    VMS) - not Oracle Oracle.
    The SQL Service software we're currently using is version 7.1. This
    version works well with the OCI8 driver (when connecting to the
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    there is a need to restart the service from time to time. Oracle has
    since confirmed that this is a bug that they have yet to resolve...
    So we have to stick to OCI8 (THICK) for the time being. I would really
    appreciate it very much if you can tell me the various OCI libraries
    that I need to load (in terms of WebLogic Server config file settings
    etc..).
    By the way I have already installed the Oracle 8 client software on
    the NT server (where WebLogic Server is) and I have also set up the
    relevant SID (using the Net8 Assistant) that points to the Oracle Rdb
    database on the VMS. I have also tried using SQL*Plus to connect to
    the database and I can connect properly to the database. But WebLogic
    simply doesn't seem to load the software.
    Help...
    Regards,
    Bobby Brown, writing from Australia.

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         at weblogic.jdbc.jts.Connection.internalCommit(Connection.java:697)
         at weblogic.jdbc.jts.Connection.commit(Connection.java:415)
         at weblogic.transaction.internal.ServerResourceInfo.commit(ServerResourceInfo.java:1180)
         at weblogic.transaction.internal.ServerResourceInfo.commit(ServerResourceInfo.java:419)
         at weblogic.transaction.internal.ServerSCInfo.startCommit(ServerSCInfo.java:233)
         at weblogic.transaction.internal.ServerTransactionImpl.localCommit(ServerTransactionImpl.java:1397)
         at weblogic.transaction.internal.ServerTransactionImpl.globalRetryCommit(ServerTransactionImpl.java:1940)
         at weblogic.transaction.internal.ServerTransactionImpl.globalCommit(ServerTransactionImpl.java:1886)
         at weblogic.transaction.internal.ServerTransactionImpl.internalCommit(ServerTransactionImpl.java:221)
         at weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTransactionImpl.java:190)
         at weblogic.ejb20.internal.BaseEJBObject.postInvoke(BaseEJBObject.java:231)
         at com.fourthpass.wpserver.request.RequestProcessorBean_p612k3_EOImpl.processRequest(RequestProcessorBean_p612k3_EOImpl.java:46)
         at com.fourthpass.wpserver.handlers.deviceAdapter.AbstractDeviceHandler.processRequest(AbstractDeviceHandler.java:97)
         at com.fourthpass.wpserver.irm.http.RequestHandler.process(RequestHandler.java:190)
         at com.fourthpass.wpserver.irm.http.HttpRequestHandlerServlet.doRequest(HttpRequestHandlerServlet.java:128)
         at com.fourthpass.wpserver.irm.http.HttpRequestHandlerServlet.doGet(HttpRequestHandlerServlet.java:78)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
         at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)
         at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)
         at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
    Java Stack for "ExecuteThread: '73' for queue: 'default'":
    ==========
         at oracle.jdbc.driver.OracleConnection.getDefaultRowPrefetch(OracleConnection.java:1263)
         at oracle.jdbc.driver.OracleStatement.setFetchSize(OracleStatement.java:4878)
         at weblogic.jdbc.common.internal.ConnectionEnv.cleanUpStatementForReUse(ConnectionEnv.java:747)
         at weblogic.jdbc.common.internal.ConnectionEnv.dropStatement(ConnectionEnv.java:719)
         at weblogic.jdbc.jts.Statement.close(Statement.java:231)
         at weblogic.jdbc.rmi.internal.StatementImpl.close(StatementImpl.java:97)
         at weblogic.jdbc.rmi.SerialStatement.close(SerialStatement.java:123)
         at weblogic.jdbc.rmi.SerialStatement.close(SerialStatement.java:113)
         at weblogic.ejb20.cmp11.rdbms.PersistenceManagerImpl.releaseStatement(PersistenceManagerImpl.java:596)
         at weblogic.ejb20.cmp11.rdbms.PersistenceManagerImpl.releaseResources(PersistenceManagerImpl.java:562)
         at weblogic.ejb20.cmp11.rdbms.PersistenceManagerImpl.releaseResources(PersistenceManagerImpl.java:531)
         at com.fourthpass.wpserver.billingentities.PendingBillingInfo_6hg1f2__WebLogic_CMP_RDBMS.ejbRemove(PendingBillingInfo_6hg1f2__WebLogic_CMP_RDBMS.java:1135)
         at weblogic.ejb20.manager.DBManager.remove(DBManager.java:627)
         at weblogic.ejb20.internal.EntityEJBObject.remove(EntityEJBObject.java:117)
         at com.fourthpass.wpserver.billingentities.PendingBillingInfoBeanCMP_6hg1f2_EOImpl.remove(PendingBillingInfoBeanCMP_6hg1f2_EOImpl.java:559)
         at com.fourthpass.wpserver.billing.BillingBean.movePendingToActiveBilling(BillingBean.java:1442)
         at com.fourthpass.wpserver.billing.BillingBean.reportSuccessfulInstallation(BillingBean.java:1349)
         at com.fourthpass.wpserver.billing.BillingBean.reportApplicationInstallStatusCode(BillingBean.java:968)
         at com.fourthpass.wpserver.billing.BillingBean.reportApplicationInstallStatusCode(BillingBean.java:937)
         at com.fourthpass.wpserver.billing.BillingBean_t3moiz_EOImpl.reportApplicationInstallStatusCode(BillingBean_t3moiz_EOImpl.java:1265)
         at com.fourthpass.wpserver.handlers.request.mascommands.InstallNotifyCommand.handleOtaEvent(InstallNotifyCommand.java:187)
         at com.fourthpass.wpserver.handlers.request.mascommands.InstallNotifyCommand.process(InstallNotifyCommand.java:94)
         at com.fourthpass.wpserver.request.handlers.MASRequestHandler.process(MASRequestHandler.java:90)
         at com.fourthpass.wpserver.request.RequestProcessorBean.processRequest(RequestProcessorBean.java:113)
         at com.fourthpass.wpserver.request.RequestProcessorBean_p612k3_EOImpl.processRequest(RequestProcessorBean_p612k3_EOImpl.java:37)
         at com.fourthpass.wpserver.handlers.deviceAdapter.AbstractDeviceHandler.processRequest(AbstractDeviceHandler.java:97)
         at com.fourthpass.wpserver.irm.http.RequestHandler.process(RequestHandler.java:190)
         at com.fourthpass.wpserver.irm.http.HttpRequestHandlerServlet.doRequest(HttpRequestHandlerServlet.java:128)
         at com.fourthpass.wpserver.irm.http.HttpRequestHandlerServlet.doPost(HttpRequestHandlerServlet.java:89)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
         at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)
         at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)
         at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
         at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
    Found 1 deadlock.

    Chad Urso McDaniel wrote:
    I've been doing testing on a 12 CPU SunFire 6800 and am seeing the
    Oracle JDBC driver that ships with weblogic deadlock in Java. Has
    anyone else come across this?
    Also, does anyone know how to find the version of the oracle driver or simply know which version WebLogic 6.1 ships with?Oracle does have later driver versions, so do download it and make sure it's ahead of all weblogic
    stuff in the server's classpath (as it is created by the start script).
    Joe
    >
    >
    thank you
    FOUND A JAVA LEVEL DEADLOCK:
    "ExecuteThread: '180' for queue: 'default'":
    waiting to lock monitor 0xcbb28 (object 0xdee1d070, a oracle.jdbc.driver.OraclePreparedStatement),
    which is locked by "ExecuteThread: '73' for queue: 'default'"
    "ExecuteThread: '73' for queue: 'default'":
    waiting to lock monitor 0xcbc78 (object 0xdec416b8, a oracle.jdbc.driver.OracleConnection),
    which is locked by "ExecuteThread: '180' for queue: 'default'"
    JAVA STACK INFORMATION FOR THREADS LISTED ABOVE:
    Java Stack for "ExecuteThread: '180' for queue: 'default'":
    ==========
    at oracle.jdbc.driver.OraclePreparedStatement.sendBatch(OraclePreparedStatement.java:431)
    at oracle.jdbc.driver.OracleConnection.commit(OracleConnection.java:838)
    at weblogic.jdbc.jts.Connection.internalCommit(Connection.java:697)
    at weblogic.jdbc.jts.Connection.commit(Connection.java:415)
    at weblogic.transaction.internal.ServerResourceInfo.commit(ServerResourceInfo.java:1180)
    at weblogic.transaction.internal.ServerResourceInfo.commit(ServerResourceInfo.java:419)
    at weblogic.transaction.internal.ServerSCInfo.startCommit(ServerSCInfo.java:233)
    at weblogic.transaction.internal.ServerTransactionImpl.localCommit(ServerTransactionImpl.java:1397)
    at weblogic.transaction.internal.ServerTransactionImpl.globalRetryCommit(ServerTransactionImpl.java:1940)
    at weblogic.transaction.internal.ServerTransactionImpl.globalCommit(ServerTransactionImpl.java:1886)
    at weblogic.transaction.internal.ServerTransactionImpl.internalCommit(ServerTransactionImpl.java:221)
    at weblogic.transaction.internal.ServerTransactionImpl.commit(ServerTransactionImpl.java:190)
    at weblogic.ejb20.internal.BaseEJBObject.postInvoke(BaseEJBObject.java:231)
    at com.fourthpass.wpserver.request.RequestProcessorBean_p612k3_EOImpl.processRequest(RequestProcessorBean_p612k3_EOImpl.java:46)
    at com.fourthpass.wpserver.handlers.deviceAdapter.AbstractDeviceHandler.processRequest(AbstractDeviceHandler.java:97)
    at com.fourthpass.wpserver.irm.http.RequestHandler.process(RequestHandler.java:190)
    at com.fourthpass.wpserver.irm.http.HttpRequestHandlerServlet.doRequest(HttpRequestHandlerServlet.java:128)
    at com.fourthpass.wpserver.irm.http.HttpRequestHandlerServlet.doGet(HttpRequestHandlerServlet.java:78)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
    at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)
    at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)
    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
    Java Stack for "ExecuteThread: '73' for queue: 'default'":
    ==========
    at oracle.jdbc.driver.OracleConnection.getDefaultRowPrefetch(OracleConnection.java:1263)
    at oracle.jdbc.driver.OracleStatement.setFetchSize(OracleStatement.java:4878)
    at weblogic.jdbc.common.internal.ConnectionEnv.cleanUpStatementForReUse(ConnectionEnv.java:747)
    at weblogic.jdbc.common.internal.ConnectionEnv.dropStatement(ConnectionEnv.java:719)
    at weblogic.jdbc.jts.Statement.close(Statement.java:231)
    at weblogic.jdbc.rmi.internal.StatementImpl.close(StatementImpl.java:97)
    at weblogic.jdbc.rmi.SerialStatement.close(SerialStatement.java:123)
    at weblogic.jdbc.rmi.SerialStatement.close(SerialStatement.java:113)
    at weblogic.ejb20.cmp11.rdbms.PersistenceManagerImpl.releaseStatement(PersistenceManagerImpl.java:596)
    at weblogic.ejb20.cmp11.rdbms.PersistenceManagerImpl.releaseResources(PersistenceManagerImpl.java:562)
    at weblogic.ejb20.cmp11.rdbms.PersistenceManagerImpl.releaseResources(PersistenceManagerImpl.java:531)
    at com.fourthpass.wpserver.billingentities.PendingBillingInfo_6hg1f2__WebLogic_CMP_RDBMS.ejbRemove(PendingBillingInfo_6hg1f2__WebLogic_CMP_RDBMS.java:1135)
    at weblogic.ejb20.manager.DBManager.remove(DBManager.java:627)
    at weblogic.ejb20.internal.EntityEJBObject.remove(EntityEJBObject.java:117)
    at com.fourthpass.wpserver.billingentities.PendingBillingInfoBeanCMP_6hg1f2_EOImpl.remove(PendingBillingInfoBeanCMP_6hg1f2_EOImpl.java:559)
    at com.fourthpass.wpserver.billing.BillingBean.movePendingToActiveBilling(BillingBean.java:1442)
    at com.fourthpass.wpserver.billing.BillingBean.reportSuccessfulInstallation(BillingBean.java:1349)
    at com.fourthpass.wpserver.billing.BillingBean.reportApplicationInstallStatusCode(BillingBean.java:968)
    at com.fourthpass.wpserver.billing.BillingBean.reportApplicationInstallStatusCode(BillingBean.java:937)
    at com.fourthpass.wpserver.billing.BillingBean_t3moiz_EOImpl.reportApplicationInstallStatusCode(BillingBean_t3moiz_EOImpl.java:1265)
    at com.fourthpass.wpserver.handlers.request.mascommands.InstallNotifyCommand.handleOtaEvent(InstallNotifyCommand.java:187)
    at com.fourthpass.wpserver.handlers.request.mascommands.InstallNotifyCommand.process(InstallNotifyCommand.java:94)
    at com.fourthpass.wpserver.request.handlers.MASRequestHandler.process(MASRequestHandler.java:90)
    at com.fourthpass.wpserver.request.RequestProcessorBean.processRequest(RequestProcessorBean.java:113)
    at com.fourthpass.wpserver.request.RequestProcessorBean_p612k3_EOImpl.processRequest(RequestProcessorBean_p612k3_EOImpl.java:37)
    at com.fourthpass.wpserver.handlers.deviceAdapter.AbstractDeviceHandler.processRequest(AbstractDeviceHandler.java:97)
    at com.fourthpass.wpserver.irm.http.RequestHandler.process(RequestHandler.java:190)
    at com.fourthpass.wpserver.irm.http.HttpRequestHandlerServlet.doRequest(HttpRequestHandlerServlet.java:128)
    at com.fourthpass.wpserver.irm.http.HttpRequestHandlerServlet.doPost(HttpRequestHandlerServlet.java:89)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
    at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
    at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)
    at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)
    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
    Found 1 deadlock.

  • How to use the oracle jdbc driver

    hi all,
    i have use the jdbc driver for oracle before but this time i<m under a hp-ux system and it seems to be different
    the dba here said the odbc driver and the jdbc driver where install but i get this error when i compile the code
    Class oracle.jdbc.driver.OracleDriver not found in type declration.
    if i try to use a odbc driver i can compile(since the classes are in jdk1.3) but i get this error at run time
    java.sql.SQLException: No suitable driver
    at java.sql.DriverManager.getConnection(Compiled Code)
    at java.sql.DriverManager.getConnection(DriverManager.java:126)
    at TestOracle.<init>(TestOracle.java:33)
    at TestOracle.main(TestOracle.java:126)
    can someone help me out to better understand what is wrong
    it seems the drivers are not install but again the dba assures me they are
    import java.sql.*;
    import java.io.*;
    public class TestOracle {
    public TestOracle()
    // Load the Oracle JDBC driver
    // Connect to the database
    // search the dossiers numbers in the right table depending on criteria
    // if demands comes from extranet verify to only send back the dossier
    // numbers that are linked to the customer
    // Load the Oracle JDBC driver
    try
         //DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
         //Class.forName("oracle.djbc.driver.OracleDriver");
         Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
    catch( Throwable t ){t.printStackTrace();}
    //SQLException,IOException,ClassNotFoundException,
    //IllegalAccessException,InstantiationException
    try
         // Connect to the database
         // You can put a database name after the @ sign in the connection URL.
         Connection conn =
              //DriverManager.getConnection ("jdbc:oracle:oci8:@COLDDEV", "USER", "PPP");
              DriverManager.getConnection("jdbc:odbc:COLDDEV","USER", "PPP");
         Statement stmt = conn.createStatement ();
         ResultSet r = stmt.executeQuery("select * from Dossier");
         stmt.close();
         System.out.println("trouver:" + r.getString("Dossier_Number"));
    catch (SQLException e){e.printStackTrace();}
    public static void main(String[] args)
    TestOracle testOracle1 = new TestOracle();
    here is the code iuse

    http://forum.java.sun.com/thread.jsp?forum=48&thread=187964&start=0&range=15#608968
    The above link is a comprehensive "How to get set up and on my way" that I made for someone else learning Oracle/jdbc. Kind of a self-help resource page. I would start from the beginning and download the newest drivers, then set up your environment,...etc.
    hope this helped,
    Jamie

  • Java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver

    When I run java servlet test_ora.java with IE6.0 I get the following error page:
    HTTP Status 500 -
    type Exception report
    message
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    javax.servlet.ServletException: Servlet execution threw an exception
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2349)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:171)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:376)
         at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
         at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:518)
         at java.lang.Thread.run(Thread.java:536)
    root cause
    java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver
         at test_ora.doGet(test_ora.java:21)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         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$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2349)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:171)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         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$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         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:405)
         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:376)
         at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
         at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:518)
         at java.lang.Thread.run(Thread.java:536)
    Java Web Services Developer Pack/1.0-fcs
    I thought it is about JDBC configuration. But when I run JdbcCheckup.java everything works fine. Can anybody help me, please?
    test_ora.java looks like this:
    import java.io.*;
    import javax.servlet.*;
    import javax.servlet.http.*;
    import java.sql.*;
    public class test_ora extends HttpServlet {
    public void doGet(HttpServletRequest request,
    HttpServletResponse response)
    throws ServletException, IOException {
    String str_dok_numer, str_f_inkraft;
    int int_dok_wal_id;
    Connection conn=null;
    Statement s = null;
    response.setContentType("text/html;charset=iso-8859-2");
    PrintWriter out = response.getWriter();
    try {
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    conn = DriverManager.getConnection(
    "jdbc:oracle:thin:@192.168.15.2:1521:DB2","janusz","kimono");
    s = conn.createStatement();
    } catch (SQLException e) {
    out.println("Blad polaczenia z baza danych: " + e.getMessage());
    try {
    ResultSet r =s.executeQuery("select dok_numer, f_inkraft, dok_wal_id from gndlf_umowy_inkraft");
    out.println("DOK_NUMER\tF_INKRAFT\tDOK_WAL_ID");
    while(r.next()){
    out.println (r.getString (1) +"\t" + r.getString (2) + "\t" +r.getString (3));
    conn.close();
    } catch (Exception e) {
    out.println("Wystapil problem z wyslaniem SQL do bazy danych: " + e.getMessage());
    finally {
    try { conn.close(); }
    catch(SQLException e) {}
    and here is code for JdbcCheckup.java (I get it from Internet and made some modifications):
    * This sample can be used to check the JDBC installation.
    * Just run it and provide the connect information. It will select
    * "Hello World" from the database.
    // You need to import the java.sql package to use JDBC
    import java.sql.*;
    // We import java.io to be able to read from the command line
    import java.io.*;
    class JdbcCheckup {
    public static void main(String args[])
    throws SQLException, IOException
    // Load the Oracle JDBC driver
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    // Prompt the user for connect information
    System.out.println("Please enter information to test connection to the database");
    String user;
    String password;
    String database;
    user = readEntry("user: ");
    int slash_index = user.indexOf('/');
    if (slash_index != -1)
    password = user.substring(slash_index + 1);
    user = user.substring(0, slash_index);
    else
    password = readEntry("password: ");
    database = readEntry("database(a TNSNAME entry): ");
    System.out.print("Connecting to the database...");
    System.out.flush();
    System.out.println("Connecting...");
    //Connection conn = DriverManager.getConnection("jdbc:oracle:oci8:@" + database, user, password);
    Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@192.168.15.2:1521:" + database, user, password);
    System.out.println("connected!!!");
    // Create a statement
    Statement stmt = conn.createStatement();
    // Do the SQL "Hello World" thing
    ResultSet rset = stmt.executeQuery("select 'Hello World' from dual");
    while (rset.next())
    System.out.println(rset.getString(1));
    // close the result set, the statement and connect
    rset.close();
    stmt.close();
    conn.close();
    System.out.println("Your JDBC installation is correct.");
    // Utility function to read a line from standard input
    static String readEntry(String prompt)
    try
    StringBuffer buffer = new StringBuffer();
    System.out.print(prompt);
    System.out.flush();
    int c = System.in.read();
    while (c != '\n' && c != -1)
    buffer.append((char)c);
    c = System.in.read();
    return buffer.toString().trim();
    catch(IOException e) {
    return "";
    I use Java Web Service Developer Pack 1.0 on Win98 SE, database Oracle 8.1.7 is installed on dedicated IBM server (AIX 4.x).
    I put these lines in autoexec.bat:
    set PATH=C:\Perl\bin\;"C:\j2sdk1.4.0\bin";%PATH%
    set CLASSPATH=.;C:\j2sdk1.4.0\lib\tools.jar;C:\j2sdk1.4.0\lib\classes12.zip;C:\j2sdk1.4.0\lib\classes111.zip;%CLASSPATH%
    set CLASSPATH=C:\jwsdp_1_0\common\lib\servlet.jar;C:\jwsdp_1_0\common\lib\jasper-compiler.jar;C:\jwsdp_1_0\common\lib\jasper-runtime.jar;%CLASSPATH%
    set JAVA_HOME=C:\j2sdk1.4.0

    I have the same problem. I created a JSP page that uses a class to retrieve database information. I added a main method to the class so I would be able to test it. When I test the class using the main method the method returns all the information from the database. When I try it using Tomcat, I get the following error: java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver
    Does anyone have an idea of what is going on?
    My CLASSPATH configuration is the same.

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