I am developing a web application and my stack is Mysql+ hibernate+ spring. I noticed that each time i start my tomcat a new database session is created.
my application.context xml has the following configuration
<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 1"/>
<property name="maxActive" value="15" />
<property name="removeAbandoned" value="true" />
<property name="removeAbandonedTimeout" value="60" />
<property name="logAbandoned" value="true" />
</bean>
<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
Any help is much appreciated
There could be two possibilities.
Either your application is executing queries on start up. This can be verified by turning on hibernate/spring logging.
The default minIdle/initialSize connection property of the connection pool is 1. Initial size refers to the initial number of connections created when the pool is started while minIdle refers minimum number of connections that can remain idle in the pool, without extra ones being created
Related
I have configured my persistence.xml like this :
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url"
value="jdbc:mysql://isthmejjozinho.mysql.db/isthmejjozinho" />
<property name="javax.persistence.jdbc.user" value="myuser" />
<property name="javax.persistence.jdbc.password" value="mypassword" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
The console gave me back this error :
java.sql.SQLException: Access denied for user 'isthmejjozinho'#'localhost' (using password: YES)
I don't understand why I'm pointing towards localhost whereas I put an existingremote database server adress.
Hi I am trying to connect SQL Server with JDBC JTDS but it turn out an error: No suitable driver found for jdbc:jtds:sqlserver, I already put it in my dependency and it appear on the Maven library, this is my configure for datasource:
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:jtds:sqlserver://localhost/mkyongjava;instance=SQLEXPRESS" />
<property name="username" value="sa" />
<property name="password" value="admin123" />
</bean>
I already put jtds driver on Tomcat Server but no thing change
This is my project stuture
You are still providing the MySQL driver class name in the driverClassName property - try changing that to:
<property name="driverClassName" value="net.sourceforge.jtds.jdbc.Driver" />
I'm trying to configure Activemq with MySql. Everything seems to have been configured properly as i am able to send and receive messages through code. But I'm not able to see any queue or messages information in the Activemq Web Console.
below is my activemq config . Any help is apprciated.
Thank you!
Activemq.xml:
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd">
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>file:${activemq.conf}/credentials.properties</value>
</property>
</bean>
<broker useJmx="false" brokerName="jdbcBroker" xmlns="http://activemq.apache.org/schema/core">
<persistenceAdapter>
<jdbcPersistenceAdapter dataDirectory="${activemq.base}/activemq-data" dataSource="#mysql-ds"/>
</persistenceAdapter>
<transportConnectors>
<transportConnector name="default" uri="tcp://0.0.0.0:61616"/>
</transportConnectors>
</broker>
<bean id="mysql-ds" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost/activemq?relaxAutoCommit=true"/>
<property name="username" value="admin"/>
<property name="password" value="root"/>
<property name="maxActive" value="200"/>
<property name="poolPreparedStatements" value="true"/>
</bean>
<import resource="jetty.xml"/>
</beans>
As the WebConsole is using JMX to retrieve data, you should try to remove useJmx="false" from your broker configuration.
I am trying to create the schema name with my mysql (local database) url but its not working. Its working with H2 (in memory database) URL tho. Please advice.
H2 configuration -
<bean id="datasource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.h2.Driver" />
<property name="url"
value="jdbc:h2:mem:test;DB_CLOSE_DELAY=10;INIT=CREATE SCHEMA IF NOT EXISTS products" />
</bean>
MySQL configuration - (Tried various combination of init to the below but will not work)
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url"
value="jdbc:mysql://localhost:3306/test" />
<property name="username" value="user" />
<property name="password" value="password" />
</bean>
Thanks
I'm using spring 3.0 (jdbcTemplate), Tomcat, MySQL and C3p0 to handle my database activities. I'm using both jdbctemplate and simplejdbctemplate which will take care of creating and closing connections, statements, resultsets etc. I'm using C3p0 for connection pooling however the connections are remaining open and eventually the app will run out of connections.
Here is the configuration of my data source:
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" >
<property name="driverClass" value="${jdbc.driverClassName}"></property>
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="user" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="initialPoolSize" value="5"></property>
<property name="maxPoolSize" value="100"/>
<property name="minPoolSize" value="5"/>
<property name="maxIdleTime" value="30"/>
<property name="maxIdleTimeExcessConnections" value="30"/>
<property name="maxConnectionAge" value="30"/>
<property name="checkoutTimeout" value="100"/>
<property name="maxStatements" value="50"></property>
<property name="automaticTestTable" value="C3P0_TEST_TABLE"></property>
<property name="testConnectionOnCheckin" value="true"></property>
<property name="idleConnectionTestPeriod" value="30"></property>
</bean>
I'm also using TransactionManagement provided by spring - here is the configuration of that:
<!-- enable the configuration of transactional behavior based on annotations -->
<tx:annotation-driven transaction-manager="txManager"/>
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
Here is the rest of the datasource configuration:
<bean id="simpleJdbcTemplate" class="org.springframework.jdbc.core.simple.SimpleJdbcTemplate">
<constructor-arg><ref bean="dataSource"/></constructor-arg>
</bean>
<bean id="userDAO" class="com.Test.dao.UserDAOImpl">
<property name="jdbcTemplate"><ref bean="jdbcTemplate"/></property>
</bean>
Finally here is a method where I update records into a database:
#Transactional(readOnly=false)
public void updateBenchMarkCumulative(List<BenchMarkCumulative> bmCumulativeList)
{
List<Object[]> parameters = new ArrayList<Object[]>();
for(BenchMarkCumulative bmCumulative : bmCumulativeList)
{
parameters.add(new Object[]{bmCumulative.getCumulativeAmt(), bmCumulative.getPkBenchMarkCumulative()});
}
this.simpleJdbcTemplate.batchUpdate(UPDATE_BENCHMARK_CUMULATIVE, parameters);
}
Is there something I'm doing wrong in my configuration or am I missing something that needs to be added to the configuration or coding?
Here is the exception being thrown:
INFO [http-8080-1] (AbstractPoolBackedDataSource.java510) - Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ java.beans.IntrospectionException: java.lang.reflect.InvocationTargetException [numThreadsAwaitingCheckoutDefaultUser] ]
org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too many connections"
Thank you in advance.
Keith
I would agree with axtavt. I was in a similar situation, and there were couple places I was manually opening connections but not closing them (stored procedure calls for iSeries). Please verify if you have that kind of spots.