java.lang.NullPointerException: This exception has no message.

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at org.apache.catalina.connector.MapperListener.destroy(
at org.apache.catalina.connector.Connector.stop(
at org.apache.catalina.core.StandardService.stop(
at org.apache.catalina.core.StandardServer.stop(
at org.apache.catalina.startup.Catalina.stop(
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(

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