java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:Failed to start COM

Source: Internet
Author: User

Error title.
Cause: servlet mapping configuration Error in Web. XML <url-pattern>
Correct the changes. I deleted it directly, and the bug was solved.
Another problem is Xxx.jar fail to load. This may be the case that the jar file in the Project Project Lib package duplicates the error conflict caused by the jar file in the Tomcat's own Lib package, deleting the corresponding jar file in the project engineering.

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java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException:Failed to start COM

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