本地代码能正常运行，但是布置到服务器之后报HTTP Status 500 – Internal Server Error

[qq_39440022]

代码在本地能正常运行，但是布置到服务器上会报如下错误，请各位大佬指导下！！前两天还可以正常运行，进行登录服务器就崩掉了。
HTTP Status 500 – Internal Server Error

Type Exception Report

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

java.lang.NullPointerException
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1136)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:748)

Note The full stack trace of the root cause is available in the server logs.
Apache Tomcat/7.0.90

[青冘丶]

本地数据库和服务器数据库不统一吧 把服务器数据库拉一份到你本地排错吧

[Gemini_Kanon]

空指针了，你做了什么操作

[weixin_40290083]

你引的包是不是位置有问题

[qq_20809943]

只能看出是认证时抛null了，有更全面的错误日志么？

[qq_783939100]

把代码贴上来看下