Tomcat異常：java.lang.NullPointerException utils.ManageIP.validIp（ManageIP.java:113）

我們的Tomcat服務器正在生成500個錯誤，並吐出下面的堆棧跟蹤，但Google搜索的根本原因（即，utils.ManageIP .validIp）不會產生任何東西。Tomcat異常：java.lang.NullPointerException utils.ManageIP.validIp（ManageIP.java:113）

爲什麼會utils.ManageIP.validIp爲空？

下面是導致可愛異常的代碼：

String IP = request.getRemoteAddr(); 
if (!utils.ManageIP.validIp(IP)) { 
    // Do stuff 
}

困惑。有任何想法嗎？

org.apache.jasper.JasperException: java.lang.NullPointerException 
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:541) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:435) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
    org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694) 
    org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665) 
    org.apache.jsp.admin_jsp._jspService(admin_jsp.java:87) 
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
root cause 

java.lang.NullPointerException 
    utils.ManageIP.validIp(ManageIP.java:113) 
    org.apache.jsp.jsp.mainMenu_jsp._jspService(mainMenu_jsp.java:88) 
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
    org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694) 
    org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665) 
    org.apache.jsp.admin_jsp._jspService(admin_jsp.java:87) 
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803) 
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.14 logs.

來源

2017-06-21 Crashalot

utils.ManageIP？它是什麼？你自己的圖書館？ – Ursache

@Ursache ahhh難怪谷歌搜索沒有任何結果。 :)原始開發者的遺留代碼。謝謝！ – Crashalot

@Ursache請發表回覆，謝謝！ – Crashalot

utils.ManageIP？它是什麼？你自己的圖書館？

編輯：評論證明，它是一個傳統的開發代碼。

來源

2017-06-21 16:58:32 Ursache

Tomcat異常：java.lang.NullPointerException utils.ManageIP.validIp（ManageIP.java:113）

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