Hibernate和C3p0池的問題

Question

我正在使用hibernate 4.3.0和c3p0池測試Web應用程序，有時在重新加載上下文后我收到此錯誤：

 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

依賴 - 也許hibernate-c3p0 dependecie是enougth？

<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>

休眠設置

<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>

這個錯誤的原因是什么，並且很難修復它？ 與hibernate-c3p0相關的所有依賴都在類路徑中。

Answer 1

請參閱我添加的鏈接作為評論。 在重新部署期間卸載類，如果你無法關閉Hibernate的sessionFactory，那么你會得到這些ClassNotFound錯誤。 其中一個答案表明您可以添加自定義ServletContextListener來處理contextDestroyed事件。