Database connection pooling errors in Tomcat 5.5.17

[David Smith <dns4 (at) cornell.edu>]

I think I see the problem...

ojdbc14.jar should be in $TOMCAT_HOME/common/lib to be available to both 
the container and your webapp. 

.jar files are always stored in a lib folder.  Relative to tomcat's home 
dir -- shared/lib, common/lib.  Relative to the webapp -- WEB-INF/lib

--David

Saurabh Nanda wrote:

> This is the complete stacktrace of the error if it helps. The
> ojdbc14.jar file is in the WEB-INF/classes directory.
>
> SEVERE: Servlet.service() for servlet test threw exception
> java.lang.NullPointerException
>        at 
> org.apache.tomcat.dbcp.dbcp.DelegatingConnection.close(DelegatingConnection.java:151) 
>
>        at 
> org.apache.tomcat.dbcp.dbcp.PoolableConnection.reallyClose(PoolableConnection.java:95) 
>
>        at 
> org.apache.tomcat.dbcp.dbcp.PoolableConnectionFactory.destroyObject(PoolableConnectionFactory.java:301) 
>
>        at 
> org.apache.tomcat.dbcp.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:883) 
>
>        at 
> org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:851) 
>
>        at 
> org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:540) 
>
>        at testConf.TestConfServlet.doGet(TestConfServlet.java:37)
>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>        at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) 
>
>        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.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432) 
>
>        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:869) 
>
>        at 
> org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) 
>
>        at 
> org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) 
>
>        at 
> org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) 
>
>        at 
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 
>
>        at java.lang.Thread.run(Thread.java:595)


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