分析Unable to start embedded Tomcat
近期研习微服务相关知识的过程中出现了Unable to start embedded Tomcat的问题，网上查询了一些相关的解决方式，仍然无法解决，通过比对学习的项目的相关配置，才解决了这个问题
问题产生过程
在学习微服务知识时想要自己搭建一个EurekaServer,使用工具Spring Tool Suite4,通过Maven创建父工程 parent工程，pom.xml配置如下
4.0.0org.springframework.bootspring-boot-starter-parent2.2.5.RELEASEcom.springcloudparent0.0.1-SNAPSHOTpomspringcloud1.8org.springframework.cloudspring-cloud-dependenciesHoxton.SR3pomimportorg.springframework.bootspring-boot-maven-plugin
EurekaServer 服务端的相关配置
4.0.0com.springcloudparent0.0.1-SNAPSHOTeureka_server1.8org.springframework.bootspring-boot-starter-weborg.springframework.cloudspring-cloud-starter-netflix-eureka-serverorg.springframework.bootspring-boot-starter-testtestorg.springframework.bootspring-boot-maven-plugin
EurekaServer – application.properties文件配置
#eureka服务端应用的端口默认是8761 server.port=9001 #表示是否将自己注册到Eureka Server,默认为true,由于当前应用就是Eureka Server,故而设为false eureka.client.register-with-eureka=false # 表示是否从Eureka Server获取注册信息,默认为true,因为这是一个单点的Eureka Server,不需要同步其他的Eureka Server节点的数据,故而设为false eureka.client.fetch-registry=false eureka.client.service-url.defaultZone: http://localhost:9001/eureka/
服务在启动过程中出现了下面的报错
java.lang.ExceptionInInitializerError: null at com.thoughtworks.xstream.XStream.setupConverters(XStream.java:990) ~[xstream-1.4.11.1.jar:1.4.11.1] at com.thoughtworks.xstream.XStream.(XStream.java:593) ~[xstream-1.4.11.1.jar:1.4.11.1] at com.thoughtworks.xstream.XStream.(XStream.java:515) ~[xstream-1.4.11.1.jar:1.4.11.1] at com.thoughtworks.xstream.XStream.(XStream.java:484) ~[xstream-1.4.11.1.jar:1.4.11.1] at com.thoughtworks.xstream.XStream.(XStream.java:430) ~[xstream-1.4.11.1.jar:1.4.11.1] at com.thoughtworks.xstream.XStream.(XStream.java:397) ~[xstream-1.4.11.1.jar:1.4.11.1] at com.netflix.discovery.converters.XmlXStream.(XmlXStream.java:51) ~[eureka-client-1.9.17.jar:1.9.17] at com.netflix.discovery.converters.XmlXStream.(XmlXStream.java:42) ~[eureka-client-1.9.17.jar:1.9.17] at com.netflix.discovery.converters.wrappers.CodecWrappers$XStreamXml.(CodecWrappers.java:358) ~[eureka-client-1.9.17.jar:1.9.17] at com.netflix.discovery.converters.wrappers.CodecWrappers.create(CodecWrappers.java:133) ~[eureka-client-1.9.17.jar:1.9.17] at com.netflix.discovery.converters.wrappers.CodecWrappers.getEncoder(CodecWrappers.java:75) ~[eureka-client-1.9.17.jar:1.9.17] at com.netflix.discovery.converters.wrappers.CodecWrappers.getEncoder(CodecWrappers.java:66) ~[eureka-client-1.9.17.jar:1.9.17] at com.netflix.discovery.provider.DiscoveryJerseyProvider.(DiscoveryJerseyProvider.java:77) ~[eureka-client-1.9.17.jar:1.9.17] at com.netflix.discovery.provider.DiscoveryJerseyProvider.(DiscoveryJerseyProvider.java:64) ~[eureka-client-1.9.17.jar:1.9.17] at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:78) ~[na:na] at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na] at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[na:na] at java.base/java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) ~[na:na] at java.base/jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:350) ~[na:na] at java.base/java.lang.Class.newInstance(Class.java:642) ~[na:na] at com.sun.jersey.core.spi.component.ComponentConstructor._getInstance(ComponentConstructor.java:193) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.core.spi.component.ComponentConstructor.getInstance(ComponentConstructor.java:180) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.core.spi.component.ProviderFactory.__getComponentProvider(ProviderFactory.java:166) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.core.spi.component.ProviderFactory._getComponentProvider(ProviderFactory.java:159) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.core.spi.component.ProviderFactory.getComponentProvider(ProviderFactory.java:153) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.core.spi.component.ProviderServices.getComponent(ProviderServices.java:278) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.core.spi.component.ProviderServices.getProviders(ProviderServices.java:151) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.core.spi.factory.MessageBodyFactory.initReaders(MessageBodyFactory.java:175) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.core.spi.factory.MessageBodyFactory.init(MessageBodyFactory.java:162) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1338) ~[jersey-server-1.19.1.jar:1.19.1] at com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:180) ~[jersey-server-1.19.1.jar:1.19.1] at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:799) ~[jersey-server-1.19.1.jar:1.19.1] at com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:795) ~[jersey-server-1.19.1.jar:1.19.1] at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193) ~[jersey-core-1.19.1.jar:1.19.1] at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795) ~[jersey-server-1.19.1.jar:1.19.1] at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790) ~[jersey-server-1.19.1.jar:1.19.1] at com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:509) ~[jersey-servlet-1.19.1.jar:1.19.1] at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:339) ~[jersey-servlet-1.19.1.jar:1.19.1] at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605) ~[jersey-servlet-1.19.1.jar:1.19.1] at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207) ~[jersey-servlet-1.19.1.jar:1.19.1] at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394) ~[jersey-servlet-1.19.1.jar:1.19.1] at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:744) ~[jersey-servlet-1.19.1.jar:1.19.1] at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:270) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:106) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4533) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5172) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na] at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:145) ~[na:na] at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na] at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:145) ~[na:na] at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.apache.catalina.startup.Tomcat.start(Tomcat.java:467) ~[tomcat-embed-core-9.0.31.jar:9.0.31] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:107) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.(TomcatWebServer.java:88) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:438) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:191) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:153) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at eureka_server.EurekaServerApplication.main(EurekaServerApplication.java:11) ~[classes/:na] Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible: module java.base does not "opens java.util" to unnamed module @74d1dc36 at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357) ~[na:na] at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297) ~[na:na] at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:177) ~[na:na] at java.base/java.lang.reflect.Field.setAccessible(Field.java:171) ~[na:na] at com.thoughtworks.xstream.core.util.Fields.locate(Fields.java:40) ~[xstream-1.4.11.1.jar:1.4.11.1] at com.thoughtworks.xstream.converters.collections.TreeMapConverter.(TreeMapConverter.java:50) ~[xstream-1.4.11.1.jar:1.4.11.1] ... 83 common frames omitted [2m2021-08-01 21:51:33.414[0;39m [31mERROR[0;39m [35m17088[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.apache.catalina.core.StandardContext [0;39m [2m:[0;39m One or more Filters failed to start. Full details will be found in the appropriate container log file [2m2021-08-01 21:51:33.414[0;39m [31mERROR[0;39m [35m17088[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.apache.catalina.core.StandardContext [0;39m [2m:[0;39m Context [] startup failed due to previous errors [2m2021-08-01 21:51:33.419[0;39m [33m WARN[0;39m [35m17088[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.a.c.loader.WebappClassLoaderBase [0;39m [2m:[0;39m The web application [ROOT] appears to have started a thread named [spring.cloud.inetutils] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread: java.base@16.0.1/jdk.internal.misc.Unsafe.park(Native Method) java.base@16.0.1/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341) java.base@16.0.1/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505) java.base@16.0.1/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137) java.base@16.0.1/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614) java.base@16.0.1/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435) java.base@16.0.1/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056) java.base@16.0.1/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116) java.base@16.0.1/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) java.base@16.0.1/java.lang.Thread.run(Thread.java:831) [2m2021-08-01 21:51:33.496[0;39m [32m INFO[0;39m [35m17088[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.apache.catalina.core.StandardService [0;39m [2m:[0;39m Stopping service [Tomcat] [2m2021-08-01 21:51:33.498[0;39m [33m WARN[0;39m [35m17088[0;39m [2m---[0;39m [2m[ main][0;39m [36mConfigServletWebServerApplicationContext[0;39m [2m:[0;39m Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat [2m2021-08-01 21:51:33.511[0;39m [32m INFO[0;39m [35m17088[0;39m [2m---[0;39m [2m[ main][0;39m [36mConditionEvaluationReportLoggingListener[0;39m [2m:[0;39m Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. [2m2021-08-01 21:51:33.513[0;39m [31mERROR[0;39m [35m17088[0;39m [2m---[0;39m [2m[ main][0;39m [36mo.s.boot.SpringApplication [0;39m [2m:[0;39m Application run failed org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:156) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) ~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at eureka_server.EurekaServerApplication.main(EurekaServerApplication.java:11) ~[classes/:na] Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:126) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.(TomcatWebServer.java:88) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:438) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:191) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:153) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] ... 8 common frames omitted Caused by: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.rethrowDeferredStartupExceptions(TomcatWebServer.java:171) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:110) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE] ... 13 common frames omitted
从网上其他的文章分析来看-开始分析是由于相同一个maven repository造成的冲突，于是重新新建了一个repository 改了setting.xml配置，重新maven，启动还是报一样的错，仔细分析后，看到jre编译环境有所不同，开始下载sts之后一直没有改变过环境也是采用默认的jre
后面换成本地jdk1.8.0_251之后启动正常，打开eureka管理中心也是可以打开
此文章不一定适用所有人，但也为此问题提供了一个解决方法，如有瑕疵，往请见谅
以上就是解决“Unable to start embedded Tomcat“错误的完整指南的详细内容，更多关于Unable to start embedded Tomcat的资料请关注IT俱乐部其它相关文章！
