Tomcat使用Hibernate进行池化的问题。 MySQL超时 [英] Issue with Tomcat pooling with Hibernate. MySQL timeout
本文介绍了Tomcat使用Hibernate进行池化的问题。 MySQL超时的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我一直在使用MySQL 在tomcat7上开发一个带有hibernate3的 struts web应用程序。起初我一直在使用c3p0 pooling，然后我打开了 tomcat pooling 。但是一天之后我会得到同样的错误。每天早上，我们必须重新启动服务器。
日志显示 java.lang.NullPointerException 像这样
sm.Login.execute（Login.java:24）
sun.reflect.NativeMethodAccessorImpl.invoke0（本地方法）
sun.reflect.NativeMethodAccessorImpl.invoke（Unknown Source）
sun.reflect.DelegatingMethodAccessorImpl.invoke（Unknown Source）
java.lang.reflect.Method.invoke（Unknown Source）
com .opensymphony.xwork2.DefaultActionInvocation.invokeAction（DefaultActionInvocation.java:452）
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly（DefaultActionInvocation.java:291）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation .java：254）
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept（DefaultWorkflowInterceptor.java:176）
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）
com.opensymphony.xwork2.Defau ltActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept（ValidationInterceptor.java:263）
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept（ AnnotationValidationInterceptor.java:68）
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept（ConversionErrorInterceptor.java:133）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2。 interceptor.parametersInterceptor.doIntercept（ParametersInterceptor.java:207）
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvo （Method.FilterInterceptor.java:98））。
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept（StaticParametersInterceptor.java:190）
com.opensymphony。 xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
org.apache.struts2.interceptor.MultiselectInterceptor.intercept（MultiselectInterceptor.java:75）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation。 java：248）
org.apache.struts2.interceptor.CheckboxInterceptor.intercept（CheckboxInterceptor.java:94）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
org.apache.struts2.interceptor.FileUploadInterceptor.intercept（FileUploadI nterceptor.java:243）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept（ModelDrivenInterceptor.java:100）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept（ScopedModelDrivenInterceptor.java:141）
com.opensymphony.xwork2。 DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept（DebuggingInterceptor.java:270）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation。 java：248）
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept（ChainingInterceptor.java:145）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept（镨epareInterceptor.java:171）
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept（MethodFilterInterceptor.java:98）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept（I18nInterceptor.java:176）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
org.apache.struts2。 interceptor.ServletConfigInterceptor.intercept（ServletConfigInterceptor.java:164）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept（AliasInterceptor。 java：190）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept（ExceptionMappingInterceptor.java:187）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvoc ation.java:248）
interceptors.SessionCheck.intercept（SessionCheck.java:47）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
interceptors.LoginInterceptor。拦截（LoginInterceptor.java:43）
com.opensymphony.xwork2.DefaultActionInvocation.invoke（DefaultActionInvocation.java:248）
org.apache.struts2.impl.StrutsActionProxy.execute（StrutsActionProxy.java:52）
org.apache.struts2.dispatcher.Dispatcher.serviceAction（Dispatcher.java:498）
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction（ExecuteOperations.java:77）
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter（StrutsPrepareAndExecuteFilter.java:91）
我的META-INF / context.xml在这里，
< xml version =1.0encoding =UTF-8？> < Context antiJARLocking =truepath =/ sealmanagement>
RemoveAbandoned =true
maxAllowed =150
maxIdle =15
name =jdbc / stockdb
类型=javax.sql.DataSource
factory =org.apache.tomcat.jdbc.pool.DataSourceFactory
url =jdbc：mysql：// localhost：3306 / stockdb？ autoReconnect = true
driverClassName =com.mysql.jdbc.Driver
username =root
password =1234
jmxEnabled =true
testWhileIdle =true
testOnBorrow =true
validationQuery =SELECT 1
testOnReturn =true
validationInterval =3000
timeBetweenEvictionRunsMillis =30000
maxActive =100
initialSize =10
maxWait =1000
minEvictableIdleTimeMillis =30000
minIdle =10
logAbandoned =true
jdbcInterceptors =org.apache.tomcat.jdbc.pool.interceptor.ConnectionState ;要么g.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer
/>
和hibernate.cfg.xml如下，
<？xml version =1.0encoding = UTF-8\" >？;
<！DOCTYPE hibernate-configuration PUBLIC
- // Hibernate / Hibernate配置DTD 3.0 // EN
http://hibernate.sourceforge.net/hibernate-configuration-3.0 .dtd>
< hibernate-configuration>
< session-factory>
<！ - 使用容器管理的JNDI - >
< property name =hibernate.connection.datasource>
java：comp / env / jdbc / stockdb
< / property>
< property name =hibernate.dialect>
org.hibernate.dialect.MySQLDialect
< / property>
< property name =hibernate.current_session_context_class> org.hibernate.context.ThreadLocalSessionContext< / property>
包dbcon;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.SessionFactory;
/ **
* Hibernate Utility类通过一种方便的方法获取Session Factory对象。
*
*
* /
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
//从标准（hibernate.cfg.xml）
// config文件创建SessionFactory。
sessionFactory = new AnnotationConfiguration（）。configure（）。buildSessionFactory（）;
} catch（Throwable ex）{
//记录异常。
System.err.println（Initial SessionFactory creation failed。+ ex）;
抛出新的ExceptionInInitializerError（ex）;
public static SessionFactory getSessionFactory（）{
return sessionFactory;
$ / code $ / pre
$ hr
事件虽然不影响我已经把Java代码中的PoolProperties类也放在这里。可能它可能是... ...
这里是Getdbcon.java
package dbcon;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import org.apache.tomcat.jdbc.pool.DataSource;
import org.apache.tomcat.jdbc.pool.PoolProperties;
public class Getdbcon {
//获取mysql连接// - shehan
public Connection getmysqlConnection（）throws SQLException {
PoolProperties p = new PoolProperties（）;
p.setUrl（jdbc：mysql：// localhost：3306 / stockdb？auto_reconnect = true）;
p.setDriverClassName（com.mysql.jdbc.Driver）;
p.setUsername（root）;
p.setPassword（1234）;
p.setJmxEnabled（true）;
p.setTestWhileIdle（true）;
p.setTestOnBorrow（true）;
p.setValidationQuery（SELECT * from userlogin where 1 limit 1）;
p.setTestOnReturn（true）;
p.setValidationInterval（30000）;
p.setTimeBetweenEvictionRunsMillis（30000）;
p.setMaxActive（100）;
p.setInitialSize（2）;
p.setMaxWait（10000）;
p.setMinEvictableIdleTimeMillis（30000）;
p.setMinIdle（10）;
p.setLogAbandoned（true）;
p.setRemoveAbandoned（false）;
p.setJdbcInterceptors（org.apache.tomcat.jdbc.pool.interceptor.ConnectionState; org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer）;
DataSource datasource = new DataSource（）;
datasource.setPoolProperties（p）;
连接con = null;
尝试{
con = datasource.getConnection（）;
}
catch（Exception e）{
e.printStackTrace（）;
}
return con;
}
，这里有一些来自tomcat启动日志控制台的一些行......认为它们很有用
INFO：JDBC驱动程序：MySQL-AB JDBC驱动程序，版本：mysql-connector-java-5.1.6（修订版：$ {svn.Revision}）
2013年3月15日上午9点00分08秒org.hibernate.dialect.Dialect < INIT>
INFO：使用方言：org.hibernate.dialect.MySQLDialect
2013年3月15日上午9时00分08秒org.hibernate.transaction.TransactionFactoryFactory buildTransactionFactory
INFO：使用默认事务策略（直接JDBC事务）
org.hibernate.transaction.TransactionManagerLookupFactory getTransactionManagerLookup
INFO：没有配置TransactionManagerLookup（在JTA环境中，使用读写或事务二级缓存不推荐）
2013年3月15日上午9时00分08秒org.hibernate.cfg.SettingsFactory buildSettings
INFO：在beforeCompletion（）期间自动刷新（）：已禁用
2013年3月15日9： 00:08 AM org.hibernate.cfg.SettingsFactory buildSettings
INFO：在事务结束时自动关闭会话：disabled
请将您的关注放在此处。您非常感激。 然后我添加了 wait_timeout 变量在 my.ini 的末尾。
并赋予其最大值。
根据
然后一切都解决了。这不是问题再次困扰我。
感谢您 hd1 求助。
I've been developing a struts web app with hibernate3 on tomcat7 using MySQL. At first i've been using c3p0 pooling... then I've swithched to tomcat pooling. But I get the same error after a one day. Every morning we have to restart the server.
The log shows java.lang.NullPointerException like this
sm.Login.execute(Login.java:24)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:452)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:291)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:254)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:270)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
interceptors.SessionCheck.intercept(SessionCheck.java:47)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
interceptors.LoginInterceptor.intercept(LoginInterceptor.java:43)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:498)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
my META-INF/context.xml is here,
<?xml version="1.0" encoding="UTF-8"?> <Context antiJARLocking="true" path="/sealmanagement">
RemoveAbandoned="true"
maxAllowed="150"
maxIdle="15"
name="jdbc/stockdb"
type="javax.sql.DataSource"
factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
url="jdbc:mysql://localhost:3306/stockdb?autoReconnect=true"
driverClassName="com.mysql.jdbc.Driver"
username="root"
password="1234"
jmxEnabled="true"
testWhileIdle="true"
testOnBorrow="true"
validationQuery="SELECT 1"
testOnReturn="true"
validationInterval="3000"
timeBetweenEvictionRunsMillis="30000"
maxActive="100"
initialSize="10"
maxWait="1000"
minEvictableIdleTimeMillis="30000"
minIdle="10"
logAbandoned="true"
jdbcInterceptors="org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer"
/>
and hibernate.cfg.xml is following,
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- using container-managed JNDI -->
<property name="hibernate.connection.datasource">
java:comp/env/jdbc/stockdb
</property>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="hibernate.current_session_context_class">org.hibernate.context.ThreadLocalSessionContext</property>
package dbcon;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.SessionFactory;
/**
* Hibernate Utility class with a convenient method to get Session Factory object.
*
*
*/
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
// Create the SessionFactory from standard (hibernate.cfg.xml)
// config file.
sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
} catch (Throwable ex) {
// Log the exception.
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
event though it doesn't affect I've put PoolProperties class in java code as well. May be it could be the isse...
here is the Getdbcon.java
package dbcon;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import org.apache.tomcat.jdbc.pool.DataSource;
import org.apache.tomcat.jdbc.pool.PoolProperties;
public class Getdbcon {
//get mysql connection // -- shehan
public Connection getmysqlConnection() throws SQLException {
PoolProperties p = new PoolProperties();
p.setUrl("jdbc:mysql://localhost:3306/stockdb?auto_reconnect=true");
p.setDriverClassName("com.mysql.jdbc.Driver");
p.setUsername("root");
p.setPassword("1234");
p.setJmxEnabled(true);
p.setTestWhileIdle(true);
p.setTestOnBorrow(true);
p.setValidationQuery("SELECT * from userlogin where 1 limit 1");
p.setTestOnReturn(true);
p.setValidationInterval(30000);
p.setTimeBetweenEvictionRunsMillis(30000);
p.setMaxActive(100);
p.setInitialSize(2);
p.setMaxWait(10000);
p.setMinEvictableIdleTimeMillis(30000);
p.setMinIdle(10);
p.setLogAbandoned(true);
p.setRemoveAbandoned(false);
p.setJdbcInterceptors("org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer");
DataSource datasource = new DataSource();
datasource.setPoolProperties(p);
Connection con = null;
try{
con = datasource.getConnection();
}
catch(Exception e){
e.printStackTrace();
}
return con;
}
and here some lines from tomcat startup log console... think they are useful
INFO: JDBC driver: MySQL-AB JDBC Driver, version: mysql-connector-java-5.1.6 ( Revision: ${svn.Revision} )
Mar 15, 2013 9:00:08 AM org.hibernate.dialect.Dialect <init>
INFO: Using dialect: org.hibernate.dialect.MySQLDialect
Mar 15, 2013 9:00:08 AM org.hibernate.transaction.TransactionFactoryFactory buildTransactionFactory
INFO: Using default transaction strategy (direct JDBC transactions)
Mar 15, 2013 9:00:08 AM org.hibernate.transaction.TransactionManagerLookupFactory getTransactionManagerLookup
INFO: No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
Mar 15, 2013 9:00:08 AM org.hibernate.cfg.SettingsFactory buildSettings
INFO: Automatic flush during beforeCompletion(): disabled
Mar 15, 2013 9:00:08 AM org.hibernate.cfg.SettingsFactory buildSettings
INFO: Automatic session close at end of transaction: disabled
Please put your kind attention on this. You are very well appreciated.
解决方案 Then I've added wait_timeout variable at the end of the my.ini.
and given the maximum value to it.
according to this
Then everything solved. Not that issue is bothering me anymore.
thank you hd1 for help.
这篇关于Tomcat使用Hibernate进行池化的问题。 MySQL超时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
