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java.lang.NullPointerException: 	at org.apache.catalina.connector.MapperListener.destroy(MapperListener.java:162)	at org.apache.catalina.connector.Connector.stop(Connector.java:1138)	at org.apache.catalina.core.StandardService.stop(StandardService.java:519)	at org.apache.catalina.core.StandardServer.stop(StandardServer.java:734)	at org.apache.catalina.startup.Catalina.stop(Catalina.java:602)	at org.apache.catalina.startup.Catalina.start(Catalina.java:577)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)