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sentinel结合restTemplate,本地无问题,通过jenkins发布到测试环境,就抛异常

版本对应: springboot 2.3.7 spring-cloud-starter-alibaba-sentinel 2.2.5 sentinel结合restTemplate,在本地调试熔断机制一切正常,将服务使用公司流水线发布到docker容器中,可以正常部署,但是访问服务接口就直接抛出以下异常: 2021-09-10T16:07:30.469000Z BUSINESS_ERROR >>>uri:/healthy,param:{},catch unknown exceptionorg.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class com.alibaba.csp.sentinel.context.ContextUtil at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1055) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.cmb.bee.tracer.server.filter.SpanContextCopyFilter.doFilter(SpanContextCopyFilter.java:65) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) 2021-09-10T16:07:30.469000Z BUSINESS_ERROR >>>uri:/healthy,param:{},catch unknown exceptionorg.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: Could not initialize class com.alibaba.csp.sentinel.context.ContextUtil at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1055) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.cmb.bee.tracer.server.filter.SpanContextCopyFilter.doFilter(SpanContextCopyFilter.java:65) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)

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游客a4pbeuxcmkeqa 2021-09-09 22:31:46 1164 分享 版权
阿里云 AI 助理回答

根据您提供的错误信息,问题主要在于java.lang.NoClassDefFoundError: Could not initialize class com.alibaba.csp.sentinel.context.ContextUtil,这通常意味着Sentinel的ContextUtil类在容器环境中未能正确初始化或找不到相应的类定义。这可能是由于以下几种原因造成的:

  1. 依赖冲突或缺失:确保您的Docker镜像中包含了所有必要的Sentinel和相关依赖,并且没有版本冲突。可能在构建Docker镜像时,某些依赖没有被正确地包含进去。

  2. 类加载器问题:在Docker容器环境下,可能存在类加载器加载顺序或上下文隔离的问题,导致Spring Boot应用无法找到Sentinel的相关类。检查Dockerfile或构建脚本,确认是否正确设置了CLASSPATH或者有无特殊的类加载配置。

  3. JVM参数或环境变量差异:本地开发环境与Docker容器环境之间可能存在JVM参数或系统环境变量的差异,这些差异可能导致Sentinel初始化失败。请检查Docker容器启动时使用的JVM参数以及环境变量设置,确保它们与本地调试环境一致。

  4. 资源访问权限:虽然这种情况较少见,但容器内应用可能因为文件系统权限问题无法访问到某些必要的资源(如配置文件),间接导致类加载失败。检查容器内的文件权限设置。

解决建议:

  • 重新构建镜像并验证依赖:使用mvn dependency:tree或Gradle的依赖分析命令检查项目依赖,确保所有必要的Sentinel及其依赖都被包含,并且没有版本冲突。然后,基于此重新构建Docker镜像。

  • 检查Dockerfile配置:确保Dockerfile中正确复制了所有必要的资源文件,并且设置了正确的WORKDIR、JAVA_OPTS等。

  • 查看容器日志:深入检查Docker容器的日志输出,可能会有更详细的错误信息提示是哪个具体依赖未找到或初始化失败。

  • 环境一致性检查:对比本地和Docker容器的环境变量、JVM参数等,确保两者尽可能保持一致。

如果以上步骤都无法解决问题,考虑在Dockerfile中添加一些诊断命令,比如直接运行一个简单的Java程序来尝试加载Sentinel的类,以进一步定位问题所在。

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