I found there are some xml file in the conf/ directory: linux:~/tomcat/apache-tomcat-5.5.26/conf # ls .   Catalina    catalina.policy      logging.properties  server.xml        web.xml ..  DBTest.xml  catalina.properties  server-minimal.xml  tomcat-users.xml linux:~/tomcat/apache-tomcat-5.5.26/conf # do I need to remove DBTest.xml and web.xml here? Thanks Sam > ----- Original Message ----- > From: sam wun > Sent: 03/09/08 11:13 am > To: Tomcat Users List > Subject: Re: Re: Can't execute servlet project > > After moved the context.xml file to > /tomcat/apache-tomcat-5.5.26/conf/Catalina/localhost/ > > with the content changed to: > > > >     >     WEB-INF/web.xml > >     >     >    type="javax.sql.DataSource" >                maxActive="100" maxIdle="30" maxWait="10000" >                username="javauser" password="javadude" > driverClassName="com.mysql.jdbc.Driver" >                url="jdbc:mysql://localhost:3306/javatest"  > validationQuery="select 1" /> > > (I have the exact db, table and username/password created like this). > > And I have removed the context.xml file in webapps/DBTest/WEB-INF/lib/ > > My testdb.jsp in /tomcat/apache-tomcat-5.5.26/webapps/DBTest looks is > shown > below: > > <%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %> > <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> > > > select id, foo, bar from testdata > > > >   >     DB Test >   >   > >  

Results

> > >     Foo ${row.foo}
>     Bar ${row.bar}
>
> >   > > > > > Then shudown and restarted tomcat server. > > > I m still getting the DataSource Invalid errors: > > > > 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: Unable to get connection, > DataSource invalid: "org.apache.tomcat.dbcp.dbcp.SQLNestedException: > Cannot > create JDBC driver of class '' for connect URL 'null'" > > > org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460) > > > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355) > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) > javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > root cause javax.servlet.ServletException: Unable to get connection, > DataSource invalid: "org.apache.tomcat.dbcp.dbcp.SQLNestedException: > Cannot > create JDBC driver of class '' for connect URL 'null'" > > > org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841) > > > org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774) > org.apache.jsp.testdb_jsp._jspService(testdb_jsp.java:82) > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) > javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331) > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) > > ... > > > > > > javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > > ----- Original Message ----- > > From: David Smith > > Sent: 03/09/08 03:06 am > > To: Tomcat Users List > > Subject: Re: Can't execute servlet project > > > > > > > > Here is the mysql-connector jar file I got in the common/lib > directory: > > > > > > linux:~/tomcat/apache-tomcat-5.5.26/common/lib # ls mysql* > > > mysql-connector-java-5.1.3-rc-bin.jar > > > > > > > > > > > > Is thsi the correct mysql jar file? > > > > > Yes ... looks good. Just be sure this is the only place you have a > > mysql JDBC driver installed. There should not be one in > > webapps/DBTest/WEB-INF/lib if it exists here. > > > > > This is the only context.xml file I got in the tomcat (5.5.26) > > directory: > > > > > > /tomcat/apache-tomcat-5.5.26/conf/context.xml: ... > > That is the universal one. The context xml file should be either in > > your webapp's META-INF folder named context.xml or in tomcat's > > conf/Catalina/localhost named DBTest.xml. It only contains a > ... > xml element and it's contents. Something like: > > > > > > > type="javax.sql.DataSource" > > maxActive="100" maxIdle="30" maxWait="10000" > > username="javauser" password="javadude" > > driverClassName="com.mysql.jdbc.Driver" > > url="jdbc:mysql://localhost:3306/javatest" > > validationQuery="select 1" /> > > > > > > Obviously replace the username, password, and URL with what's > > appropriate to your database environment. > > > > You can read more on this at > > > > > http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html > > > > --David > > > > sam wun wrote: > > > Here is the mysql-connector jar file I got in the common/lib > directory: > > > > > > linux:~/tomcat/apache-tomcat-5.5.26/common/lib # ls mysql* > > > mysql-connector-java-5.1.3-rc-bin.jar > > > > > > > > > > > > Is thsi the correct mysql jar file? > > > > > > > > > > > > Thanks > > > > > > Sam > > > > > > > > > > > > > > > > > > > > >> ----- Original Message ----- > > >> From: David Smith > > >> Sent: 03/09/08 01:49 am > > >> To: Tomcat Users List > > >> Subject: Re: Can't execute servlet project > > >> > > >> DataSource invalid: "org.apache.tomcat.dbcp.dbcp.SQLNestedException: > > >> Cannot create JDBC driver of class '' for connect URL 'null'" > > >> > > >> This error typically indicates the JNDI db pool hasn't been setup > > >> correctly. Some config option isn't setup. What's in this webapp's > > >> context xml file? Also what's in it's WEB-INF/web.xml? Lastly, you > > >> should have your database driver jar file in tomcat's common/lib > (for > > >> tomcat v 5.5) or /lib (tomcat v 6). > > >> > > >> You can also take a look at tomcat's JDBC Datasource howto's on the > > >> tomcat website for your version of tomcat which offer a lot of help. > > >> > > >> --David > > >> > > >> sam wun wrote: > > >> > > >>> Thanks David, > > >>> > > >>> > > >>> > > >>> After copied the jstl and standard dot jar files into the > directory: > > >>> > > >>> linux:~/tomcat/apache-tomcat-5.5.26/webapps/DBTest/WEB-INF/lib # ls > > >>> . .. jstl.jar mysql-connector-java-5.1.3-rc-bin.jar > standard.jar > > >>> > > >>> > > >>> > > >>> I got the following different errors: > > >>> > > >>> (In line 4, what is jdbc/TestDB? I have database called javatest, > and > > >>> > > >> table > > >> > > >>> testdata. Should I rename it to jdbc/javatest? > > >>> > > >>> > > >>> > > >>> > > >>> > > >>> 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: Exception in JSP: > > >>> /testdb.jsp:4 > > >>> > > >>> 1: <%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" > %> > > >>> 2: <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> > > >>> 3: > > >>> 4: > > >>> 5: select id, foo, bar from testdata > > >>> 6: > > >>> 7: > > >>> > > >>> > > >>> Stacktrace: > > >>> > > >>> > > >>> > > >> > > > org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451) > > >> > > >>> > > >>> > > >>> > > >> > > > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355) > > >> > > >>> > > >>> > > >> > > > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) > > >> > > >>> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) > > >>> javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > >>> > > >>> root cause javax.servlet.ServletException: Unable to get > connection, > > >>> DataSource invalid: > "org.apache.tomcat.dbcp.dbcp.SQLNestedException: > > >>> > > >> Cannot > > >> > > >>> create JDBC driver of class '' for connect URL 'null'" > > >>> > > >>> > > >>> > > >> > > > org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841) > > >> > > >>> > > >>> > > >>> > > >> > > > org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774) > > >> > > >>> org.apache.jsp.testdb_jsp._jspService(testdb_jsp.java:82) > > >>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) > > >>> javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > >>> > > >>> > > >>> > > >> > > > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331) > > >> > > >>> > > >>> > > >> > > > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) > > >> > > >>> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) > > >>> javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > >>> > > >>> root cause 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'" > > >>> > > >>> > > >>> > > >> > > > org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnection(QueryTagSupport.java:276) > > >> > > >>> > > >>> > > >>> > > >> > > > org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag(QueryTagSupport.java:159) > > >> > > >>> > > >>> > > >>> > > >> > > > org.apache.jsp.testdb_jsp._jspx_meth_sql_005fquery_005f0(testdb_jsp.java:101) > > >> > > >>> org.apache.jsp.testdb_jsp._jspService(testdb_jsp.java:58) > > >>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) > > >>> javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > >>> > > >>> > > >>> > > >> > > > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331) > > >> > > >>> > > >>> > > >> > > > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) > > >> > > >>> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) > > > > > >>> > > >> > > >> > > >>> javax.servlet.http.HttpServlet.service(HttpServlet.java:803) > > >>> > > >>> > > >>> > > >>> > > >>> > > >>> > > >>> > > > > > > --------------------------------------------------------------------- > > To start a new topic, e-mail: users@tomcat.apache.org > > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org > > For additional commands, e-mail: users-help@tomcat.apache.org > > >