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java.lang.NullPointerException: 	at org.apache.catalina.connector.MapperListener.destroy(MapperListener.java:171)	at org.apache.catalina.connector.Connector.stop(Connector.java:1179)	at org.apache.catalina.core.StandardService.stop(StandardService.java:593)	at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)	at org.apache.catalina.startup.Catalina.stop(Catalina.java:633)	at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:676)