出现一个奇葩的空指针异常
java.lang.NullPointerException: null
at org.apache.catalina.authenticator.AuthenticatorBase.getJaspicProvider(AuthenticatorBase.java:1192)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:465)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
刚开始看到这个错，一脸闷逼，后面找了个帖子后https://stackoverflow.com/questions/38802437/upgrading-spring-boot-from-1-3-7-to-1-4-0-causing-nullpointerexception-in-authen
看到觉得可能是包的冲突问题，因为本地都没问题
后面用AuthConfigFactoryImpl这个类，去查找，springboot里的tomcat有这么一个类，javax-api里也有，所以我就尝试把javaee-apI的包排除了，就可以了
<exclusion> <groupId>javax</groupId> <artifactId>javaee-api</artifactId> </exclusion>
原文：http://www.cnblogs.com/xuerong/p/7152738.html