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

I'm running a Java app in Eclipse EE Oxygen 32 bit in a 64 machine since the program will be transferred to a 32 bit machine later. The app is connected to mysql installed through Wampserver, and the server I'm using in the app is Apache Tomcat 8.0.35. When I run the app in "Run as> Run on Server" inside Eclispe. I get the following error message in "Console":

 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)

How can I debug that?

Answer 1

The java code is totally portable across 32-bit and 64-bit platforms, doesn't make sense to use a 32 bit Eclipse version.

To solve your issue, just restart the Tomcat server to get rid of the older cache then try again.

If still doesn't work:

1. Restart Eclipse
2. Clean up Eclipse working directory (see @nitind comment).
3. Run Eclipse in clean mode (see this )