Eclipse和Tomcat 8.0.35应用程序错误：非法访问：此Web应用程序实例已被停止

Question

我正在64台计算机上的32位Eclipse EE Oxygen中运行Java应用程序，因为该程序将在以后转移到32位计算机上。 该应用程序连接到通过Wampserver安装的mysql，而我在该应用程序中使用的服务器是Apache Tomcat 8.0.35。 当我在Eclispe的“运行方式>在服务器上运行”中运行应用程序时。 我在“控制台”中收到以下错误消息：

 Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1372)
    at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1042)
    at com.mysql.jdbc.AbandonedConnectionCleanupThread.checkContextClassLoaders(AbandonedConnectionCleanupThread.java:90)
    at com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:63)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

我该如何调试？

Answer 1

Java代码完全可以在32位和64位平台上移植，而使用32位Eclipse版本没有任何意义。

要解决您的问题，只需重新启动Tomcat服务器以摆脱旧的缓存，然后重试即可。

如果仍然不起作用：

1. 重新启动Eclipse
2. 清理Eclipse工作目录（请参阅@nitind注释）。
3. 以干净模式运行Eclipse（请参阅此 ）