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java.lang.NullPointerException: 	at org.apache.tomcat.util.net.NioEndpoint.releaseCaches(NioEndpoint.java:304)	at org.apache.tomcat.util.net.NioEndpoint.unbind(NioEndpoint.java:480)	at org.apache.tomcat.util.net.AbstractEndpoint.destroy(AbstractEndpoint.java:818)	at org.apache.coyote.AbstractProtocol.destroy(AbstractProtocol.java:532)	at org.apache.catalina.connector.Connector.destroyInternal(Connector.java:1023)	at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:305)	at org.apache.catalina.core.StandardService.destroyInternal(StandardService.java:588)	at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:305)	at org.apache.catalina.core.StandardServer.destroyInternal(StandardServer.java:859)	at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:305)	at org.apache.catalina.startup.Catalina.start(Catalina.java:629)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:497)	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)