我们遇到了一些关于tomcats 和j_security 的问题。没有任何更改，然后重新启动后，它们开始失败并出现以下错误：
[http-8180-Processor23] 错误 org.apache.catalina.core.ContainerBase.[Catalina].[some.fake.address].[/].[default] - servlet 默认的 Servlet.service() 抛出异常 java。 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215) 的 org.apache.catalina.core.ApplicationFilterChain 的 org.securityfilter.filter.SecurityFilter.doFilter(SecurityFilter.java:120) 的 lang.NullPointerException。 doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172) at org.apache .catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 在 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) 在 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) 在 org.apache.coyote.http11.Http11Processor 的 org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) .process(Http11Processor.java:880) 在 org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) 在 org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) ) 在 org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 在 java.lang 的 org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)。线程.run(线程.java:662)catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:880) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol. java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) at org.apache .tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 在 java.lang.Thread.run(Thread.java:662)catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:880) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol. java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) at org.apache .tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 在 java.lang.Thread.run(Thread.java:662)processConnection(Http11BaseProtocol.java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)在 org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 在 java.lang.Thread.run(Thread.java:662)processConnection(Http11BaseProtocol.java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)在 org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 在 java.lang.Thread.run(Thread.java:662)
他们根据 CAS 服务器对用户进行身份验证，从 LDAP 检索数据。使用 CAS 服务器的所有其他服务（moodle、php）都正常工作，第三个 tomcat 服务器（我们还没有重新启动）也在工作。任何人都可以找出问题或如何开始调试它？谢谢