Help needed to run JSTL 1.1 in Tomcat 6.0.16

Question

Hi All,Help needed to run JSTL 1.1 in Tomcat 6.0.16. I am trying to run the example given in http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html The example tries to connect to MySQL database from JSP using JSTL and JNDI Datasource.I am running the example using Eclipse 3.4.2 using Sysdeo plugin to start and stop Tomcat server from Eclipse IDE.
My web.xml file has <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
</web-app>
and test.jsp has proper taglib directives
<%@ taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
I have placed the jstl.jar and standard.jarof the jakarta-taglibs-standard-1.1.2.zip under E:\Deepa\workspace\DBTest\WebContent\WEB-INF\lib directory also placedcontext.xml file under E:\Deepa\workspace\DBTest\WebContent\META-INF and the content of context.xml is as below
<Context path="/DBTest" docBase="DBTest"
debug="5" reloadable="true" crossContext="true">
<Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="deepa" password="mysql" driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/javatest?autoReconnect=true"/>
</Context>
Now while running the example, Eclipse creates one DBTest.xml file under C:\Program Files\Apache Software Foundation\Tomcat 6.0\conf\Catalina\localhost
which has the following line:
<Context path="/DBTest" reloadable="true" docBase="E:\Deepa\workspace\DBTest" workDir="E:\Deepa\workspace\DBTest\work" />
I am getting the following error when running http://localhost/DBTest/WebContent/test.jsp
in Browser:
<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: The absolute uri: http://java.sun.com/jsp/jstl/sql cannot be resolved in either web.xml or the jar files deployed with this application
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:51)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:116)
org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:315)
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:148)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:431)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:494)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1444)
org.apache.jasper.compiler.Parser.parse(Parser.java:138)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:216)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:103)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:154)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:315)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
In the Tomcat Server console, I am getting the following error:
INFO: Server startup in 7295 ms
May 20, 2009 6:36:48 AM org.apache.jasper.compiler.TldLocationsCache processWebDotXml
WARNING: Internal Error: File /WEB-INF/web.xml not found
May 20, 2009 6:36:48 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/sql cannot be resolved in either web.xml or the jar files deployed with this application
what is the problem with my code?
When running the same example, by creating a local server in Eclipse(creating new Server connection pointing to same Tomcat 6.0 installation) it runs fine without any error.

Answer 1

Hi evnafets,
Wow, very helpful information, great insight into working of Eclipse. Thanks a lot.
I have one more question. I have a context.xml file under {color:#0000ff}E:\Deepa\workspace\DBTest\WebContent\META-INF{color} folder and that has the Resource element to connect to MySQL database:
{code{color:#000000}}{color}<Context path="/DBTest" docBase="DBTest" debug="5" reloadable="true" crossContext="true">
<Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource" maxActive="100" maxIdle="30" maxWait="10000" username="deepa" password="mysql" driverClassName="com.mysql.jdbc.Driver"
{color:#0000ff}url="jdbc:mysql://localhost:3306/javatest?autoReconnect=true"/>{color}
{color:#0000ff}</Context>{color}As usual when running application in local Tomcat server of Eclipse, this data source works fine. But when I run the application on Tomcat, by starting Sysdeo plugin from Eclipse, the DBTest.xml file created in C:\Tomcat 6.0\conf\Catalina\localhost has the context entry as<Context path="/DBTest" reloadable="true" docBase="E:\Deepa\workspace\DBTest\WebContent" workDir="E:\Deepa\workspace\DBTest\work">
</Context>The<Resource> element I have specified in the context.xml of \WebContent\META-INF folder is not taken into account by Tomcat and it gives the following error:May 21, 2009 5:20:04 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "org.apache.tomcat.dbcp.dbcp.SQLNestedException_: Cannot create JDBC driver of class '' for connect URL 'null'"
_at org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnection(_QueryTagSupport.java:276_)
at org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag(_QueryTagSupport.java:159_)
at org.apache.jsp.test_jsp._jspx_meth_sql_005fquery_005f0(_test_jsp.java:113_)
at org.apache.jsp.test_jsp._jspService(_test_jsp.java:66_)
at org.apache.jasper.runtime.HttpJspBase.service(_HttpJspBase.java:70_)
at javax.servlet.http.HttpServlet.service(_HttpServlet.java:717_)
at org.apache.jasper.servlet.JspServletWrapper.service(_JspServletWrapper.java:374_)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(_JspServlet.java:342_)
at org.apache.jasper.servlet.JspServlet.service(_JspServlet.java:267_)
at javax.servlet.http.HttpServlet.service(_HttpServlet.java:717_)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(_ApplicationFilterChain.java:290_)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(_ApplicationFilterChain.java:206_)
at org.apache.catalina.core.StandardWrapperValve.invoke(_StandardWrapperValve.java:233_)
at org.apache.catalina.core.StandardContextValve.invoke(_StandardContextValve.java:191_)
at org.apache.catalina.core.StandardHostValve.invoke(_StandardHostValve.java:128_)
at org.apache.catalina.valves.ErrorReportValve.invoke(_ErrorReportValve.java:102_)
at org.apache.catalina.core.StandardEngineValve.invoke(_StandardEngineValve.java:109_)
at org.apache.catalina.connector.CoyoteAdapter.service(_CoyoteAdapter.java:286_)
at org.apache.coyote.http11.Http11Processor.process(_Http11Processor.java:845_)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(_Http11Protocol.java:583_)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(_JIoEndpoint.java:447_)
at java.lang.Thread.run(_Thread.java:619_)
{code}
So to overcome this error I had to place the <Resource> element in DBTest.xml under C:\Tomcat 6.0\conf\Catalina\localhost {color:#000000}and then it works fine. {color}{color:#ff0000}*Why is the context.xml file in META-INF not considered by Tomcat server using Sysdeo Plugin?*
*Thanks,*
*Deepa*{color}
{color}
Edited by: Deepa76 on May 26, 2009 9:32 PM