HTTP?? 500 - ???????


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?? ?????????????????????

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java.lang.NullPointerException
	MusicServlet.doPost(MusicServlet.java:20)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

):?? ??????? stack ????? server logs ???


Apache Tomcat/9.0.35