The StandardJarScanner is used to process when start scan the WebFragment. It first scan for all jars in WEB-INF/lib and then scan the whole classpath from all classloader.
The first scan went through correctly (https://github.com/apache/tomcat/blob/7.0.x/java/org/apache/tomcat/util/scan/StandardJarScanner.java#L164).

The second scan also went across the WEB-INF/lib and use this condition: https://github.com/apache/tomcat/blob/7.0.x/java/org/apache/tomcat/util/scan/StandardJarScanner.java#L229-L230 to determine if this jar is already scanned.

The problem happens when in the jar path, there is a ".jar" inside it, for example: file:/Users/lynx/myproject/.jarvis/jarvisproject/WEB-INF/lib/mylibrary.jar (url.toString() form)

The root cause I believe is due to this line: https://github.com/apache/tomcat/blob/7.0.x/java/org/apache/tomcat/util/scan/StandardJarScanner.java#L362, which only scan for the ".jar" suffix from the first found and return the index. There is some path in my server that contains a ".jar" in the path of a jar and breaks this logic.

Due to the condition doesn't met in StandardJarScanner, the webfragment is being scanned twice and cause a validation failure with some stacktrace like following:
```
  INFO | jvm 1 | 2021/04/08 15:46:00 | Caused by: java.lang.IllegalArgumentException: More than one fragment with the name [myfragment] was found. This is not legal with relative ordering. See section 8.2.2 2c of the Servlet specification for details. Consider using absolute ordering.
INFO | jvm 1 | 2021/04/08 15:46:00 | at org.apache.catalina.deploy.WebXml.orderWebFragments(WebXml.java:2338)
INFO | jvm 1 | 2021/04/08 15:46:00 | at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1228)
INFO | jvm 1 | 2021/04/08 15:46:00 | at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:888)
INFO | jvm 1 | 2021/04/08 15:46:00 | at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:388)
INFO | jvm 1 | 2021/04/08 15:46:00 | at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
INFO | jvm 1 | 2021/04/08 15:46:00 | at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5536)
INFO | jvm 1 | 2021/04/08 15:46:00 | at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
```

I would think a "lastIndexOf" is better fit but I'm not sure if this can cover all the cases.