Java Hibernate和C3p0池的问题_Java_Hibernate_C3p0

Java Hibernate和C3p0池的问题

java hibernate

Java Hibernate和C3p0池的问题,java,hibernate,c3p0,Java,Hibernate,C3p0,我正在使用hibernate 4.3.0和c3p0池测试web应用程序，有时在重新加载上下文后会出现以下错误： INFO: Reloading Context with name [/AppName] is completed янв 07, 2015 12:07:14 AM org.apache.catalina.loader.WebappClassLoader loadClass INFO: Illegal access: this web application inst

我正在使用hibernate 4.3.0和c3p0池测试web应用程序，有时在重新加载上下文后会出现以下错误：

 INFO: Reloading Context with name [/AppName] is completed
    янв 07, 2015 12:07:14 AM org.apache.catalina.loader.WebappClassLoader loadClass
    INFO: Illegal access: this web application instance has been stopped already.  Could not load com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
    java.lang.IllegalStateException
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1612)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
        at com.mchange.v2.resourcepool.BasicResourcePool.checkIdleResources(BasicResourcePool.java:1584)
        at com.mchange.v2.resourcepool.BasicResourcePool.access$2000(BasicResourcePool.java:44)
        at com.mchange.v2.resourcepool.BasicResourcePool$CheckIdleResourcesTask.run(BasicResourcePool.java:2116)
        at java.util.TimerThread.mainLoop(Timer.java:555)
        at java.util.TimerThread.run(Timer.java:505)

Exception in thread "C3P0PooledConnectionPoolManager[identityToken->1hge136961hmilhm17ylc97|17d425e]-AdminTaskTimer" java.lang.NoClassDefFoundError: com/mchange/v2/resourcepool/BasicResourcePool$AsyncTestIdleResourceTask
    at com.mchange.v2.resourcepool.BasicResourcePool.checkIdleResources(BasicResourcePool.java:1584)
    at com.mchange.v2.resourcepool.BasicResourcePool.access$2000(BasicResourcePool.java:44)
    at com.mchange.v2.resourcepool.BasicResourcePool$CheckIdleResourcesTask.run(BasicResourcePool.java:2116)
    at java.util.TimerThread.mainLoop(Timer.java:555)
    at java.util.TimerThread.run(Timer.java:505)
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.resourcepool.BasicResourcePool$AsyncTestIdleResourceTask
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    ... 5 more

依赖关系-也许hibernate-c3p0依赖关系是不正常的

<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.2.1</version>
</dependency>

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-c3p0</artifactId>
    <version>4.3.0.Final</version>
</dependency>


com.mchange
c3p0
0.9.2.1
org.hibernate
hibernate-c3p0
4.3.0.1最终版本

休眠设置

<property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>

        <property name="hibernate.c3p0.min_size">5</property>
        <property name="hibernate.c3p0.max_size">20</property>
        <property name="hibernate.c3p0.timeout">3000</property>
        <property name="hibernate.c3p0.max_statements">50</property>
        <property name="hibernate.c3p0.idle_test_period">300</property>

org.hibernate.connection.C3P0ConnectionProvider
5.
20
3000
50
300

该错误的原因是什么，需要修复吗？

与hibernate-c3p0相关的所有依赖项都在类路径中。

请参考我作为注释添加的链接。在重新部署过程中，类被卸载，如果您未能关闭Hibernate的sessionFactory，则会出现这些ClassNotFound错误。其中一个答案建议您可以添加一个自定义ServletContextListener来处理contextDestroyed事件

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