问题描述：
一个上线稳定运行很久了的项目，由于需求变更开发新功能需要引入新的maven依赖，开发过程及windows7中的Tomcat8运行均正常，但是部署至Linux正式环境后调用方法抛出异常，新增 jwt 相关依赖。
异常日志：
java.lang.RuntimeException: java.lang.reflect.InvocationTargetExceptionat com.jfinal.aop.Invocation.invoke(Invocation.java:87)at com.jfinal.core.ActionHandler.handle(ActionHandler.java:74)at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:74)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1152)at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)at org.apache..NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1539)at org.apache..NioEndpoint$SocketProcessor.run(NioEndpoint.java:1495)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:748)Caused by: java.lang.reflect.InvocationTargetExceptionat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at com.jfinal.aop.Invocation.invoke(Invocation.java:73)... 20 moreCaused by: java.lang.NoSuchFieldError: USE_DEFAULTSat com.fasterxml.jackson.annotation.JsonInclude$Value.<clinit>(JsonInclude.java:204)at com.fasterxml.jackson.databind.cfg.MapperConfig.<clinit>(MapperConfig.java:44)at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:558)at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:474)at com.auth0.jwt.JWTCreator.<init>(JWTCreator.java:33)at com.auth0.jwt.JWTCreator.<init>(JWTCreator.java:24)at com.auth0.jwt.JWTCreator$Builder.sign(JWTCreator.java:311)at com.zhengxin.tools.JwtToken.createToken(JwtToken.java:41)at com.zhengxin.controller.AdminController.getXJDToken(AdminController.java:67)at com.zhengxin.controller.AdminController.login(AdminController.java:50)... 25 more
解决方案：
根据 java.lang.NoSuchFieldError 异常定位jar冲突 ，通过maven过滤找到所有相关依赖，然后检查部署war中lib的jar，发现jackson-annotations、jackson-core、jackson-databind 的jar存在高低两个版本，按照惯例保留高版本，上线ok，问题解决
参考资料：
/haifeng_cool/article/details/77196411
