Java spring数据库应用程序不会退出对org.enhydra.jdbc.pool.PoolKeeper的引用仍然处于活动状态为什么?

大家好,我有一个简单的Spring应用程序,它不会结束,因为仍然有对org.enhydra.jdbc.pool.PoolKeeper的引用。我在下面列出了所有我觉得有意义的参考资料。它看起来还好吗?以前有人经历过吗?

"Thread-1" prio=10 tid=0x00007f89b03d8000 nid=0x755 in Object.wait() [0x00007f89bc243000]    java.lang.Thread.State: TIMED_WAITING (on object monitor)  at java.lang.Object.wait(Native Method)
    - waiting on <0x00007f89ec57de00> (a org.enhydra.jdbc.pool.PoolKeeper)  at org.enhydra.jdbc.pool.PoolKeeper.run(PoolKeeper.java:55)
    - locked <0x00007f89ec57de00> (a org.enhydra.jdbc.pool.PoolKeeper)  at java.lang.Thread.run(Thread.java:619)

<bean id="innerDataSource" class="org.enhydra.jdbc.standard.StandardXADataSource"
    destroy-method="shutdown">
    <property name="transactionManager" ref="jotm" />
    <property name="driverName" value="${jdbc.driverClassName}"/>
    <property name="url" value ="${jdbc.url}"/>
    <property name="user" value="${jdbc.username}"/>
    <property name="password" value="${jdbc.password}"/>
</bean>
<bean id="dataSource" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource"
    destroy-method="shutdown">
    <property name="dataSource" ref="innerDataSource"/>
    <property name="user" value="${jdbc.username}" />
    <property name="password" value="${jdbc.password}" />
    <property name="maxSize" value="100" />
    <!-- test your jdbc connection before using it -->
    <property name="checkLevelObject" value="${jdbc.checkLevelObject}"/>
    <property name="jdbcTestStmt" value="${jdbc.jdbcTestStmt}"/>
</bean>

谢谢 保罗