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    java.lang.NullPointerException
        at org.apache.catalina.connector.Connector.stop(Connector.java:1155)
        at org.apache.catalina.core.StandardService.stop(StandardService.java:613)
        at org.apache.catalina.core.StandardServer.stop(StandardServer.java:788)
        at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:408)
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