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Using JDBC connection with property config Throwing outofmemoryerror

<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://xxx.xx.xxx.xxx:3306/vod6?autoReconnect=true" />
<!-- <property name="url" value="jdbc:mysql://xxx.xx.xxx.xxx:3306/vod2?autoReconnect=true" /> -->
<property name="username" value="voddb" />
<property name="password" value="vod#123" />
</bean>
above config xml working fine .
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${mysql.driverClassName}" />
<property name="url" value="${mysql.url}" />
<property name="username" value="${mysql.username}" />
<property name="password" value="${mysql.password}" />
</bean>
When I am trying to configure jdbc.property and configure them throwing error out of memory
Can you please explain what i am missing?
mysql.database=MYSQL
mysql.driverClassName=com.mysql.jdbc.Driver
mysql.url=jdbc:mysql://xxx.xx.xxx.xxx:3306/vod?autoReconnect=true
mysql.username=voddb
mysql.password=vod#123
mysql.initialSize=4
mysql.maxActive=30
property file

Please confirm whether the placeholder is mentioned correctly in applicationContext.xml file
<context:property-placeholder location="classpath*:catalina.properties" ignore-unresolvable="true"/>
If this is configured correctly please try removing mysql.initialSize=4 mysql.maxActive=30 from properties file and test, this may be thr root cause. Because this is the additional property you have mentioned in properties file
You can try configuring these maxActive,initialSize values in xml itself as property.
<property name="removeAbandonedTimeout" value="180"/>
<property name="removeAbandoned" value="true"/>
<property name="logAbandoned" value="true"/>
<property name="timeBetweenEvictionRunsMillis" value="5000"/>
<property name="minEvictableIdleTimeMillis" value="900000"/>
<property name="maxActive" value="20"/>
<property name="maxIdle" value="4"/>

Cannot create JDBC driver of class 'org.postgresql.Driver' for connect URL postgres://username:password#localhost:5432/dbname

I have deployed two Spring roo application on Tomcat 7 server both have database connection while hitting any service of application I am getting below exception
Cannot create JDBC driver of class 'org.postgresql.Driver' for connect URL 'postgres://username:password#localhost:5432/db'
java.sql.SQLException: No suitable driver
at java.sql.DriverManager.getDriver(DriverManager.java:278)
at org.apache.commons.dbcp.BasicDataSource.createConnectionFactory(BasicDataSource.java:1437)
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1371)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcServicesImpl.java:279)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:124)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
Please find below database base configuration
Application 1
application-Context.xml
<bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="dataSource">
<property name="driverClassName" value="${database.driverClassName}"/>
<property name="url" value="${database.url}"/>
<property name="username" value="${database.username}"/>
<property name="password" value="${database.password}"/>
<property name="testOnBorrow" value="true"/>
<property name="testOnReturn" value="true"/>
<property name="testWhileIdle" value="true"/>
<property name="timeBetweenEvictionRunsMillis" value="1800000"/>
<property name="numTestsPerEvictionRun" value="3"/>
<property name="minEvictableIdleTimeMillis" value="1800000"/>
<property name="validationQuery" value="SELECT version();"/>
</bean>
<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<tx:annotation-driven mode="aspectj" transaction-manager="transactionManager"/>
<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
<property name="persistenceUnitName" value="persistenceUnit"/>
<property name="dataSource" ref="dataSource"/>
</bean>
Application 1. Database.properties
database.driverClassName=org.postgresql.Driver
database.url=jdbc\:postgresql\://localhost\:5432/db
database.username=username
database.password=password
Application 2
application-Context.xml
<bean class="java.net.URI" id="dbUrl">
<constructor-arg value="postgres://username:password#localhost:5432/db"/>
</bean>
<bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="dataSource">
<property name="driverClassName" value="org.postgresql.Driver"/>
<property name="url" value="#{ 'jdbc:postgresql://' + #dbUrl.getHost() + ':' + #dbUrl.getPort() + #dbUrl.getPath() }"/>
<property name="username" value="#{ #dbUrl.getUserInfo().split(':')[0] }"/>
<property name="password" value="#{ #dbUrl.getUserInfo().split(':')[1] }"/>
<property name="testOnBorrow" value="true"/>
<property name="testOnReturn" value="true"/>
<property name="testWhileIdle" value="true"/>
<property name="timeBetweenEvictionRunsMillis" value="1800000"/>
<property name="numTestsPerEvictionRun" value="3"/>
<property name="minEvictableIdleTimeMillis" value="1800000"/>
<property name="validationQuery" value="SELECT version();"/>
</bean>
<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<tx:annotation-driven mode="aspectj" transaction-manager="transactionManager"/>
<util:properties id="regex.properties" location="classpath:META-INF/spring/regex.properties"/>
<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
<property name="persistenceUnitName" value="persistenceUnit"/>
<property name="dataSource" ref="dataSource"/>
</bean>
Please advice how can I resolve my Problem..

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="org.postgresql.Driver" />
<property name="jdbcUrl" value="jdbc:postgresql://localhost:5432/db" />
<property name="user" value="user" />
<property name="password" value="pass" />
<!-- pool sizing -->
<property name="initialPoolSize" value="3" />
<property name="minPoolSize" value="6" />
<property name="maxPoolSize" value="25" />
<property name="acquireIncrement" value="3" />
<property name="maxStatements" value="0" />
</bean>
I used this and it works

How to declare connection properties with ComboPooledDataSource or BasicDataSource

How to declare useFetchSizeWithLongColumn=true with Hibernate? either under com.mchange.v2.c3p0.ComboPooledDataSource or org.apache.commons.dbcp.BasicDataSource in a properties bean configuration file?
I already tried:
<bean id="oracle_prop" lazy-init="false"
class="org.springframework.util.StringUtils"
factory-method="collectionToDelimitedString">
<constructor-arg index="0">
<list>
<value>oracle.jdbc.useFetchSizeWithLongColumn=true</value>
</list>
</constructor-arg>
<constructor-arg value=";" index="1" type="java.lang.String"/>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${database.driver}"/>
<property name="url" value="${database.url}"/>
<property name="username" value="${database.username}"/>
<property name="password" value="${database.password}"/>
<property name="initialSize" value="100"/>
<property name="maxIdle" value="100"/>
<property name="maxActive" value="1000"/>
<property name="connectionProperties" ref="oracle_prop"/>
</bean>
and
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="properties" ref="dataSourceProperties"></property>
<property name="driverClass" value="${database.driver}"/>
<property name="jdbcUrl" value="${database.url}"/>
<property name="user" value="${database.username}"/>
<property name="password" value="${database.password}"/>
<property name="initialPoolSize" value="100"/>
<property name="minPoolSize" value="100"/>
<property name="maxPoolSize" value="1000"/>
<property name="maxIdleTime" value="1800"/>
<property name="maxStatements" value="50"/>
</bean>
<bean id="dataSourceProperties" class="java.util.Properties">
<constructor-arg>
<props>
<prop key="oracle.jdbc.useFetchSizeWithLongColumn">true</prop>
</props>
</constructor-arg>
</bean>
and
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="${database.driver}"/>
<property name="jdbcUrl" value="${database.url}"/>
<property name="properties">
<props>
<prop key="user">${database.username}</prop>
<prop key="password">${database.password}</prop>
<prop key="useFetchSizeWithLongColumn">true</prop>
</props>
</property>
<property name="initialPoolSize" value="100"/>
<property name="minPoolSize" value="100"/>
<property name="maxPoolSize" value="1000"/>
<property name="maxIdleTime" value="1800"/>
<property name="maxStatements" value="50"/>
</bean>

<property name="connectionProperties" ref="oracle_prop"/>
This will not work as it will try to bind "object" or "property" type object to connectionProperties where as setConnectionPropeties(String args) expect a string argument. Try changing ref with value and it should inject property as String data type. Else we can also pass properties delimited with ";".

Workaround
Look for all the long data types and change each manually.
Select * from user_tab_columns c where c.DATA_TYPE = 'LONG';
Sad to say useFetchSizeWithLongColumn will not work everytime.
So if you want to use this property, make sure that the LONG columns you are retrieving are not too big or you may run out of memory.
For JPA Hibernate, you could also add #Lob Annotation.

Connecting Java Web Application to Oracle Database

<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName"
value="????????????????????" />
<property name="url"
value="???????????????????????"/>
<property name="username" value="root" />
<property name="password" value="" />
</bean>
I am not able to figure out what should go in driver class name value and url vale. I have downloaded Oracle sql developer and oracle 11 g.But i am not sure how to configure it to my java application

Driver class name:- oracle.jdbc.driver.OracleDriver
URL :- jdbc:oracle:thin:#(hostname):(port number):(database name)
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName"
value="oracle.jdbc.driver.OracleDriver" />
<property name="url"
value="jdbc:oracle:thin:#(hostname):(port number):(database name)"/>
<property name="username" value="root" />
<property name="password" value="" />
</bean>

Your qustion is not clear if you are using Spring framework there are two type of
Data source handling technique
Method 1 you need to configure data source in your application server
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:jboss/datasources/OracleDS" />
<property name="cache" value="false"/>
<property name="lookupOnStartup" value="false"/>
<property name="proxyInterface" value="javax.sql.DataSource"/>
</bean>
Method 2
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:#127.0.0.1:1521:OMQA" />
<property name="username" value="root" />
<property name="password" value="password" />
</bean>

Null Pointer Exception - spring 3

I am using the below statement in my applicationContext.xml file (Spring 3).
<bean name="loggingAutoProxy"
class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
In this applicationContext file, when i try to give a different name for the bean property name and reference, it is returning null object. But, if i give a same value for the name and reference, it is working properly/ returning the bean reference correctly. Is this problem because of the org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator? If yes, how to resolve this issue?
This doesn't work (returns the bean reference as null in my java code):
<bean id="cacheDelegate" class="com.srsa.wiradmin.delegate.CacheDelegate" >
<property name="statusDBDAO"><ref bean="BMOStatusDBDAO" /></property>
</bean>
<bean id="BMOStatusDBDAO" class="com.srsa.wiradmin.dao.StatusDBDAO">
<property name="dataSource">
<ref bean="BMOAdminDataSource" />
</property>
</bean>
<bean id="BMOAdminDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close" lazy-init="default" autowire="default" dependency-check="default">
<property name="driverClass" value="${jdbc.driver}" ></property>
<property name="jdbcUrl" value="${admin.jdbc.url}" ></property>
<property name="user" value="${admin.jdbc.user}" ></property>
<property name="password" value="${admin.jdbc.password}" ></property>
<property name="initialPoolSize" value="3" ></property>
<property name="minPoolSize" value="3" ></property>
<property name="maxPoolSize" value="25" ></property>
<property name="acquireIncrement" value="1" ></property>
<property name="acquireRetryDelay" value="1000" ></property>
<property name="debugUnreturnedConnectionStackTraces" value="true" ></property>
<property name="maxIdleTime" value="300" ></property>
<property name="unreturnedConnectionTimeout" value="300000" ></property>
<property name="preferredTestQuery" value="SELECT COUNT(*) FROM LOCALE_CODE" ></property>
<property name="checkoutTimeout" value="300000" ></property>
<property name="idleConnectionTestPeriod" value="600000" ></property>
</bean>
This works (returns the object properly):
<bean id="cacheDelegate" class="com.srsa.wiradmin.delegate.CacheDelegate" >
<property name="statusDBDAO"><ref bean="statusDBDAO" /></property>
</bean>
<bean id="statusDBDAO" class="com.srsa.wiradmin.dao.StatusDBDAO">
<property name="dataSource">
<ref bean="BMOAdminDataSource" />
</property>
</bean>
<bean id="BMOAdminDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close" lazy-init="default" autowire="default" dependency-check="default">
<property name="driverClass" value="${jdbc.driver}" ></property>
<property name="jdbcUrl" value="${admin.jdbc.url}" ></property>
<property name="user" value="${admin.jdbc.user}" ></property>
<property name="password" value="${admin.jdbc.password}" ></property>
<property name="initialPoolSize" value="3" ></property>
<property name="minPoolSize" value="3" ></property>
<property name="maxPoolSize" value="25" ></property>
<property name="acquireIncrement" value="1" ></property>
<property name="acquireRetryDelay" value="1000" ></property>
<property name="debugUnreturnedConnectionStackTraces" value="true" ></property>
<property name="maxIdleTime" value="300" ></property>
<property name="unreturnedConnectionTimeout" value="300000" ></property>
<property name="preferredTestQuery" value="SELECT COUNT(*) FROM LOCALE_CODE" ></property>
<property name="checkoutTimeout" value="300000" ></property>
<property name="idleConnectionTestPeriod" value="600000" ></property>
</bean>
bye....

Your cacheDelegate bean is looking up a bean referenced to the ID statusDBDAO, but the ID on the DAO is actually BMOStatusDBDAO.