Oracle UCP 驱动程序和 tomcat:线程无法停止 [英] Oracle UCP driver and tomcat: threads failing to stop

问题描述

我们在 tomcat 6 中使用 Oracle UCP 驱动程序(Oracle 通用连接池).它或多或少像在 Oracles 中配置 操作方法.问题是驱动程序启动了很多线程(Thread-0 到 57，UCP-worker-thread-1 到 24)，这些线程在服务器关闭时不会停止——tomcat 会发出大量的错误消息，如下所示:<块引用>

Web 应用程序 [/xxx] 似乎启动了一个名为[Timer-17] 但未能阻止它.这很可能会创建一个内存泄漏.

知道如何处理这个问题吗?

解决方案

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;导入 oracle.ucp.admin.UniversalConnectionPoolManagerImpl;公共类 MyContextListener 实现 ServletContextListener {/* ... */@覆盖公共无效 contextDestroyed(ServletContextEvent sce) {//你的关机顺序在这里/* ... *///关闭 UCP(如果存在)，以避免有关线程泄漏的警告UniversalConnectionPoolManager ucpManager = UniversalConnectionPoolManagerImpl.getUniversalConnectionPoolManager();如果(ucpManager ！= null){String[] poolNames = ucpManager.getConnectionPoolNames();如果(池名称！= null){for (String poolName: poolNames) {ucpManager.destroyConnectionPool(poolName);}}}}}

We are using Oracle the UCP driver (Oracle Universal Connection Pool) in tomcat 6. It is more or less configured like in Oracles Howto. The problem is that the driver starts a lot of threads (Thread-0 to 57, UCP-worker-thread-1 to 24) which aren't stopped when the server shuts down - tomcat emits loads of error messages like this:

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.

Any idea how to deal with this?

解决方案

I had the same problem and managed to fix this by adding the following code in my ServletContextListener:

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);
                }
            }
        }
    }

}

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