I am getting Following Exception while configuring the Connection Pool in Tomcat
This is Context.xml
<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 -1 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.
-->
<Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="root" password="password" driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql:///BUSINESS"/>
</Context>
This is Bean Entry
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/TestDB"></property>
<property name="resourceRef" value="true"></property>
</bean>
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Co
nnection; nested exception is org.apache.tomcat.dbcp.dbcp.SQLNestedException: Ca
nnot load JDBC driver class 'com.mysql.jdbc.Driver'
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(Dat
aSourceUtils.java:82)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:
382)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:45
8)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:46
6)
at com.businesscaliber.dao.Dao.getQueryForListMap(Dao.java:66)
at com.businesscaliber.dao.MiscellaneousDao.getDefaultSucessStory(Miscel
laneousDao.java:109)
at com.businesscaliber.listeners.BusinessContextLoader.contextInitialize
d(BusinessContextLoader.java:40)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContex
t.java:3795)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4
252)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase
.java:760)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:74
0)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:831)
at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:720
)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490
)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java
:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(Lifecycl
eSupport.java:120)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443
)
at org.apache.catalina.core.StandardService.start(StandardService.java:4
48)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:700
)
at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driv
er class 'com.mysql.jdbc.Driver'
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDat
aSource.java:1136)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSo
urce.java:880)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(D
ataSourceUtils.java:113)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(Dat
aSourceUtils.java:79)
... 30 more
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDat
aSource.java:1130)
Nothing complex here – you have mysql configured, but the jdbc driver for mysql either you never installed or never placed in the classpath.
Ignore/disable spring, hibernate, connection pools and just try this java code in a jsp or whatever.
Until that works (eg file is in class path), you will continue to have sadness