[amir55]

I followed as in this site:
http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html

1 – the error in running the example

SEVERE: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 4

1: <%@ taglib uri=”http://java.sun.com/jsp/jstl/sql&#8221; prefix=”sql” %>
2: <%@ taglib uri=”http://java.sun.com/jsp/jstl/core&#8221; prefix=”c” %>
3:
4: <sql:query var=”rs” dataSource=”jdbc/TestDB”>
5: select id, foo, bar from testdata
6: </sql:query>
7:

2 – I added the driver to my web-inf/lib

3 – I have configured mysql to myeclipse that works with JBoss already

4 – I have added context to sever.xml just before </host> and my web.xml as in the tutorial as below.

The question

MyEclipse 6 comes enabled and should be configured with mysql but anyway what more to do?

1 – web.xml with only the resource-ref added

<?xml version=”1.0″ encoding=”UTF-8″?>
<web-app version=”2.4″
xmlns=”http://java.sun.com/xml/ns/j2ee&#8221;
xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance&#8221;
xsi:schemaLocation=”http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd”&gt;
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!– ************ next added as in the totorial *********** –>

<description>MySQL Test App</description>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/TestDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>

2 – server.xml with only context is added

the same but added the context as follows as in the tutorial

<!– Note: A “Server” is not itself a “Container”, so you may not
define subcomponents such as “Valves” at this level.
Documentation at /docs/config/server.html
–>
<Server port=”8005″ shutdown=”SHUTDOWN”>

<!–APR library loader. Documentation at /docs/apr.html –>
<Listener className=”org.apache.catalina.core.AprLifecycleListener” SSLEngine=”on” />
<!–Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html –>
<Listener className=”org.apache.catalina.core.JasperListener” />
<!– JMX Support for the Tomcat server. Documentation at /docs/non-existent.html –>
<Listener className=”org.apache.catalina.mbeans.ServerLifecycleListener” />
<Listener className=”org.apache.catalina.mbeans.GlobalResourcesLifecycleListener” />

<!– Global JNDI resources
Documentation at /docs/jndi-resources-howto.html
–>
<GlobalNamingResources>
<!– Editable user database that can also be used by
UserDatabaseRealm to authenticate users
–>
<Resource name=”UserDatabase” auth=”Container”
type=”org.apache.catalina.UserDatabase”
description=”User database that can be updated and saved”
factory=”org.apache.catalina.users.MemoryUserDatabaseFactory”
pathname=”conf/tomcat-users.xml” />
</GlobalNamingResources>

<!– A “Service” is a collection of one or more “Connectors” that share
a single “Container” Note: A “Service” is not itself a “Container”,
so you may not define subcomponents such as “Valves” at this level.
Documentation at /docs/config/service.html
–>
<Service name=”Catalina”>

<!–The connectors can use a shared executor, you can define one or more named thread pools–>
<!–
<Executor name=”tomcatThreadPool” namePrefix=”catalina-exec-”
maxThreads=”150″ minSpareThreads=”4″/>
–>

<!– A “Connector” represents an endpoint by which requests are received
and responses are returned. Documentation at :
Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
Java AJP Connector: /docs/config/ajp.html
APR (HTTP/AJP) Connector: /docs/apr.html
Define a non-SSL HTTP/1.1 Connector on port 8080
–>
<Connector port=”8080″ protocol=”HTTP/1.1″
connectionTimeout=”20000″
redirectPort=”8443″ />
<!– A “Connector” using the shared thread pool–>
<!–
<Connector executor=”tomcatThreadPool”
port=”8080″ protocol=”HTTP/1.1″
connectionTimeout=”20000″
redirectPort=”8443″ />
–>
<!– Define a SSL HTTP/1.1 Connector on port 8443
This connector uses the JSSE configuration, when using APR, the
connector should be using the OpenSSL style configuration
described in the APR documentation –>
<!–
<Connector port=”8443″ protocol=”HTTP/1.1″ SSLEnabled=”true”
maxThreads=”150″ scheme=”https” secure=”true”
clientAuth=”false” sslProtocol=”TLS” />
–>

<!– Define an AJP 1.3 Connector on port 8009 –>
<Connector port=”8009″ protocol=”AJP/1.3″ redirectPort=”8443″ />

<!– An Engine represents the entry point (within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone
analyzes the HTTP headers included with the request, and passes them
on to the appropriate Host (virtual host).
Documentation at /docs/config/engine.html –>

<!– You should set jvmRoute to support load-balancing via AJP ie :
<Engine name=”Standalone” defaultHost=”localhost” jvmRoute=”jvm1″>
–>
<Engine name=”Catalina” defaultHost=”localhost”>

<!–For clustering, please take a look at documentation at:
/docs/cluster-howto.html (simple how to)
/docs/config/cluster.html (reference documentation) –>
<!–
<Cluster className=”org.apache.catalina.ha.tcp.SimpleTcpCluster”/>
–>

<!– The request dumper valve dumps useful debugging information about
the request and response data received and sent by Tomcat.
Documentation at: /docs/config/valve.html –>
<!–
<Valve className=”org.apache.catalina.valves.RequestDumperValve”/>
–>

<!– This Realm uses the UserDatabase configured in the global JNDI
resources under the key “UserDatabase”. Any edits
that are performed against this UserDatabase are immediately
available for use by the Realm. –>
<Realm className=”org.apache.catalina.realm.UserDatabaseRealm”
resourceName=”UserDatabase”/>

<!– Define the default virtual host
Note: XML Schema validation will not work with Xerces 2.2.
–>
<Host name=”localhost” appBase=”webapps”
unpackWARs=”true” autoDeploy=”true”
xmlValidation=”false” xmlNamespaceAware=”false”>

<!– SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html –>
<!–
<Valve className=”org.apache.catalina.authenticator.SingleSignOn” />
–>

<!– Access log processes all example.
Documentation at: /docs/config/valve.html –>
<!–
<Valve className=”org.apache.catalina.valves.AccessLogValve” directory=”logs”
prefix=”localhost_access_log.” suffix=”.txt” pattern=”common” resolveHosts=”false”/>
–>
<!– ********************* only nest is added before the host ********************* –>
<Context path=”/DBTest” docBase=”DBTest” debug=”5″ reloadable=”true” crossContext=”true”>
<!– maxActive: Maximum number of dB connections in pool. Make sure you
configure your mysqld max_connections large enough to handle
all of your db connections. Set to 0 for no limit.
–>

<!– maxIdle: Maximum number of idle dB connections to retain in pool.
Set to -1 for no limit. See also the DBCP documentation on this
and the minEvictableIdleTimeMillis configuration parameter.
–>

<!– maxWait: Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
–>

<!– username and password: MySQL dB username and password for dB connections –>

<!– driverClassName: Class name for the old mm.mysql JDBC driver is
org.gjt.mm.mysql.Driver – we recommend using Connector/J though.
Class name for the official MySQL Connector/J driver is com.mysql.jdbc.Driver.
–>

<!– url: The JDBC connection url for connecting to your MySQL dB.
The autoReconnect=true argument to the url makes sure that the
mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
connection. mysqld by default closes idle connections after 8 hours.
–>

<Resource name=”jdbc/TestDB” auth=”Container” type=”javax.sql.DataSource”
maxActive=”100″ maxIdle=”30″ maxWait=”10000″
username=”root” password=”amir” driverClassName=”com.mysql.jdbc.Driver”
url=”jdbc:mysql://localhost:3306/javatest?autoReconnect=true”/>

</Context>

</Host>
</Engine>
</Service>
</Server>

so many thnaks

Amir

[vvvngo]

What version of Tomcat are you using?

[amir55]

This message has not been recovered.

[Hemant]

This message has not been recovered.

[amir55]

This message has not been recovered.

[Hemant]

This message has not been recovered.

[brajen]

This message has not been recovered.

[Author]

Posts