Question

打开网页出现HTTP status 500zmb

HTTP Status 500 -
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type Exception report
message
description The server encountered an internal error that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
dao.Logs.<init>(Logs.java:20)
web.l.doGet(l.java:35)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
Filter.CharacterFilter.doFilter(CharacterFilter.java:24)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.39 logs.
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Apache Tomcat/7.0.39

Answer 1

500错误都是服务器类的错误 如果是在开发的时候那么肯定是程序写得有问题 如果是开发测试完成后那么可能是关联错误引起的 也有可能是访问的人过多 服务器承担不了 处理不过来