Oracle UCP驱动和tomcat : threads failing to stop

Question

我们在 tomcat 6 中使用 Oracle 的 UCP 驱动程序(Oracle Universal Connection Pool)。它的配置或多或少类似于 Oracles Howto .问题是驱动程序启动了很多线程(Thread-0 到 57，UCP-worker-thread-1 到 24)，当服务器关闭时这些线程不会停止 - tomcat 会发出大量错误消息，如下所示:

The web application [/xxx] appears to have started a thread named [Timer-17] but has failed to stop it. This is very likely to create a memory leak.

知道如何处理这个吗？

Answer 1

我遇到了同样的问题，并通过在我的 ServletContextListener 中添加以下代码设法解决了这个问题:

import oracle.ucp.admin.UniversalConnectionPoolManager;
import oracle.ucp.admin.UniversalConnectionPoolManagerImpl;

public class MyContextListener implements ServletContextListener {
    /* ... */

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        // Your shutdown sequence here
        /* ... */

        // Shutdown UCP if present, to avoid warnings about thread leaks
        UniversalConnectionPoolManager ucpManager = UniversalConnectionPoolManagerImpl.getUniversalConnectionPoolManager();
        if (ucpManager != null) {
            String[] poolNames = ucpManager.getConnectionPoolNames();
            if (poolNames != null) {
                for (String poolName : poolNames) {
                    ucpManager.destroyConnectionPool(poolName);
                }
            }
        }
    }

}