問題描述：
一個上線穩定運行很久了的項目，由於需求變更開發新功能需要引入新的maven依賴，開發過程及windows7中的Tomcat8運行均正常，但是部署至Linux正式環境后調用方法拋出異常，新增 jwt 相關依賴。
異常日志：
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException at 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$AbstractConnectionHandler.process(AbstractProtocol.java:684) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1539) at org.apache.tomcat.util.net.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$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.jfinal.aop.Invocation.invoke(Invocation.java:73) ... 20 more Caused by: java.lang.NoSuchFieldError: USE_DEFAULTS at com.fasterxml.jackson.annotation.JsonInclude$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
解決方案：
根據 java.lang.NoSuchFieldError 異常定位jar沖突 ，通過maven過濾找到所有相關依賴，然后檢查部署war中lib的jar，發現jackson-annotations、jackson-core、jackson-databind 的jar存在高低兩個版本，按照慣例保留高版本，上線ok，問題解決
參考資料：
https://blog.csdn.net/haifeng_cool/article/details/77196411