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From vijay.gan...@subk.co.in
Subject Re: Exception Message:org.apache.tomcat.dbcp.dbcp.BasicDataSource cannot be cast to org.apache.tomcat.dbcp.dbcp.BasicDataSource
Date Mon, 09 Jul 2012 16:00:16 GMT
Thanks for your reply,

1. $CATALINA_HOME/lib

2. conf/context.xml?

3. In y application/lib also tomcat-dbcp.jar,ojdbc14.jar files are
available. Please suggest how to debug any useful site.

Thanks,


> ----- Original Message -----
>> Hi All,
>>
>> I am getting class cast exception when casting DataSource to
>> BasicDataSource.
>> The same is executed when run on JDeveloper.
>>
>> Environment : Tomcat 7.X
>> DB : Oracle
>>
>> Used : tomcat-dbcp.jar,ojdbc14.jar
>
> Where do you have these deployed?  WEB-INF/lib? $CATALINA_BASE/lib?
> $CATALINA_HOME/lib?
>
>
>> context.xml
>
> What is the location of this context file?  conf/context.xml?
> META-INF/context.xml?
>
>
>>
>> <Resource name="jdbc/ShipConsoleDS" auth="Container"
>>   type="javax.sql.DataSource"
>>   driverClassName="oracle.jdbc.OracleDriver"
>>   url="jdbc:oracle:thin:@sharp.appsahyd.com:1521:DEV01"
>>   username="apps" password="apps" maxActive="-1" maxIdle="0"
>>   maxWait="-1" initialSize="15"
>>   accessToUnderlyingConnectionAllowed="true" />
>>
>> Java Code to access Data Source :
>>
>> InitialContext initContext = new InitialContext();
>> Context envContext = (Context) initContext.lookup("java:/comp/env");
>> DataSource dataSource = (DataSource)
>> envContext.lookup("jdbc/ShipConsoleDS");
>> BasicDataSource bds = (BasicDataSource)dataSource;
>>
>>
>> Exception :
>>
>> Exception Message:org.apache.tomcat.dbcp.dbcp.BasicDataSource cannot
>> be cast to org.apache.tomcat.dbcp.dbcp.BasicDataSource
>
> I've seen similar exceptions before when the BasicDataSource class loaded
> by two different class loaders.  For example, from the common class loader
> and from the webapp class loader.  Check your class path to see if this
> might be occurring.
>
> Also, you might want to add the "-verbose:class" option to your JVM
> options.  This will print the classes that are loaded and the location
> from where they are loaded.  This is helpful if the class is unknowingly
> loaded twice.
>
> Dan
>
>
>
>> java.lang.ClassCastException:
>> org.apache.tomcat.dbcp.dbcp.BasicDataSource
>> cannot
>>  be cast to org.apache.tomcat.dbcp.dbcp.BasicDataSource
>>         at
>> com.aasc.model.AascOracleDAOFactory.createConnection(AascOracleDAOFac
>> tory.java:96)
>>         at
>>         com.aasc.model.AascDBAccess.getConnection(AascDBAccess.java:58)
>>         at
>>         com.aasc.model.AascDBAccess.getValues(AascDBAccess.java:84)
>>         at
>> org.apache.jsp.aascShipConsoleIndex_jsp._jspService(aascShipConsoleIn
>> dex_jsp.java:296)
>>         at
>>         org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
>>         at
>>         javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
>>         at
>> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
>> .java:432)
>>         at
>> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:3
>> 90)
>>         at
>>         org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
>>         at
>>         javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
>>         at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
>> icationFilterChain.java:305)
>>         at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
>> ilterChain.java:210)
>>         at
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
>> alve.java:225)
>>         at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
>> alve.java:169)
>>         at
>> org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
>> torBase.java:472)
>>         at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
>> ava:168)
>>         at
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
>> ava:98)
>>         at
>> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:
>> 927)
>>         at
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
>> ve.java:118)
>>         at
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
>> a:407)
>>         at
>> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp
>> 11Processor.java:999)
>>         at
>> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(
>> AbstractProtocol.java:565)
>>         at
>> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoin
>> t.java:309)
>>         at
>>         java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
>> Source
>> )
>>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
>>         Source)
>>         at java.lang.Thread.run(Unknown Source)
>>
>>
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>>
>
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