HTTP状态 500 - 内部服务器错误

类型 异常报告

消息 java.lang.NumberFormatException: For input string: ""

描述 服务器遇到一个意外的情况，阻止它完成请求。

例外情况

javax.servlet.ServletException: java.lang.NumberFormatException: For input string: ""
	com.sudytech.ids.security.support.login.IdsLoginValidationFilter.doFilter(IdsLoginValidationFilter.java:77)
	com.sudytech.ids.security.support.login.IdsLoginRedirectFilter.doFilter(IdsLoginRedirectFilter.java:79)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:62)
	org.springframework.cloud.sleuth.instrument.web.TraceFilter.doFilter(TraceFilter.java:145)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:111)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	com.sudytech.springboot.AutoFilter.doFilter(AutoFilter.java:66)
	com.sudytech.alarm.AlarmFilter.doFilter(AlarmFilter.java:121)

根本原因。

java.lang.NumberFormatException: For input string: ""
	java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	java.lang.Integer.parseInt(Integer.java:592)
	java.lang.Integer.parseInt(Integer.java:615)
	com.sudytech.visitlog.display.VisitCountDisplayServlet.processRequest(VisitCountDisplayServlet.java:65)
	com.sudytech.visitlog.display.VisitCountDisplayServlet.doGet(VisitCountDisplayServlet.java:489)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:489)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:583)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	com.sudytech.ids.security.support.login.IdsLoginValidationFilter.doFilter(IdsLoginValidationFilter.java:74)
	com.sudytech.ids.security.support.login.IdsLoginRedirectFilter.doFilter(IdsLoginRedirectFilter.java:79)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:62)
	org.springframework.cloud.sleuth.instrument.web.TraceFilter.doFilter(TraceFilter.java:145)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:111)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	com.sudytech.springboot.AutoFilter$1.doFilter(AutoFilter.java:60)
	com.sudytech.springboot.AutoFilter.doFilter(AutoFilter.java:66)
	com.sudytech.alarm.AlarmFilter.doFilter(AlarmFilter.java:121)

):注意 主要问题的全部 stack 信息可以在 server logs 里查看