启动时空白 eureka 对等节点主机名（启用 AWS）
Blank eureka peer node hostname when starting (AWS enabled)
我正在学习在 AWS ECS 中设置 Eureka 的过程，不幸的是缺少文档，而且网上有很多建议，这让我感到困惑。
我几乎成功地启动了带有弹性 IP 的 Eureka。我在 Route53 启动时从 Route53 抓取它们，也就是说，有一个对等节点的副本，一个主机名为空，另一个具有正确的弹性 IP，示例：
2019-10-31 22:38:46.458 INFO 73 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Adding new peer nodes [http://:8761/eureka/, http://ec2-XXX-XXX-XXX-233.compute-1.amazonaws.com:8761/eureka/]
2019-10-31 22:38:46.523 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson
2019-10-31 22:38:46.539 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson
2019-10-31 22:38:46.546 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml
2019-10-31 22:38:46.548 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml
2019-10-31 22:38:46.889 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson
2019-10-31 22:38:46.900 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson
2019-10-31 22:38:46.902 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml
2019-10-31 22:38:46.904 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml
2019-10-31 22:38:47.019 INFO 73 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Replica node URL: http://:8761/eureka/
2019-10-31 22:38:47.032 INFO 73 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Replica node URL: http://ec2-XXX-XXX-XXX-233.compute-1.amazonaws.com:8761/eureka/
Eureka 启动，我可以通过 8761 访问它，但我收到模板错误：
2019-10-31 21:46:41.882 ERROR 1 --- [nio-8761-exec-2] freemarker.runtime : Error executing FreeMarker template
freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> replica.key [in template "eureka/navbar.ftl" at line 68, column 62]
----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----
----
FTL stack trace ("~" means nesting-related):
- Failed at: ${replica.key} [in template "eureka/navbar.ftl" at line 68, column 60]
- Reached through: #include "navbar.ftl" [in template "eureka/status.ftl" at line 22, column 7]
----
at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:467) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:389) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:358) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:100) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.DollarVariable.accept(DollarVariable.java:63) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:366) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:317) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:242) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visitIteratorBlock(Environment.java:642) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:107) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:330) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:336) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.include(Environment.java:2582) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Include.accept(Include.java:171) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:330) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:336) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.process(Environment.java:309) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.template.Template.process(Template.java:384) [freemarker-2.3.28.jar!/:2.3.28]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:389) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:302) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:253) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:178) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1371) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1117) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1056) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:88) [spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:114) [spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:104) [spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_212]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_212]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_212]
2019-10-31 21:46:41.917 ERROR 1 --- [nio-8761-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> replica.key [in template "eureka/navbar.ftl" at line 68, column 62]
我尝试了几种配置都没有成功，这是我的尤里卡服务器application.properties
server.port=8761
spring.application.name=eureka
cloud.aws.stack.auto=false
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
eureka.client.service-url.default-zone=http://${eureka.instance.hostname}:${server.port}/eureka/
eureka.client.region=us-east-1
eureka.client.use-dns-for-fetching-service-urls=true
eureka.client.eureka-server-u-r-l-context=eureka
eureka.client.eureka-server-d-n-s-name=eureka.domain.com
eureka.client.eureka-server-port=8761
我还尝试了以下 Eureka 配置选项，但没有成功：
(also tried:
- eureka.client.serviceUrl.defaultZone=
- eureka.client.service-url.us-east-1c=
And also tried values such as:
- http://localhost:8761/eureka/)
终于修好了。
问题是我在 Route53 TXT 记录中根据演示文稿（我现在找不到的研讨会）的建议在开头和结尾留下了 space 并且它导致了问题，一旦删除它正常工作。
我运行输入的是docker容器的名称。容器是tomcat-9.1，我把eureka的url设置成tomcat-9.1:8080然后bang，报错了
所以我将 url 更改为 localhost:8080 并且它已修复。
我正在学习在 AWS ECS 中设置 Eureka 的过程，不幸的是缺少文档，而且网上有很多建议，这让我感到困惑。
我几乎成功地启动了带有弹性 IP 的 Eureka。我在 Route53 启动时从 Route53 抓取它们，也就是说，有一个对等节点的副本，一个主机名为空，另一个具有正确的弹性 IP，示例：
2019-10-31 22:38:46.458 INFO 73 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Adding new peer nodes [http://:8761/eureka/, http://ec2-XXX-XXX-XXX-233.compute-1.amazonaws.com:8761/eureka/]
2019-10-31 22:38:46.523 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson
2019-10-31 22:38:46.539 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson
2019-10-31 22:38:46.546 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml
2019-10-31 22:38:46.548 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml
2019-10-31 22:38:46.889 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson
2019-10-31 22:38:46.900 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson
2019-10-31 22:38:46.902 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml
2019-10-31 22:38:46.904 INFO 73 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml
2019-10-31 22:38:47.019 INFO 73 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Replica node URL: http://:8761/eureka/
2019-10-31 22:38:47.032 INFO 73 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Replica node URL: http://ec2-XXX-XXX-XXX-233.compute-1.amazonaws.com:8761/eureka/
Eureka 启动，我可以通过 8761 访问它，但我收到模板错误：
2019-10-31 21:46:41.882 ERROR 1 --- [nio-8761-exec-2] freemarker.runtime : Error executing FreeMarker template
freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> replica.key [in template "eureka/navbar.ftl" at line 68, column 62]
----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----
----
FTL stack trace ("~" means nesting-related):
- Failed at: ${replica.key} [in template "eureka/navbar.ftl" at line 68, column 60]
- Reached through: #include "navbar.ftl" [in template "eureka/status.ftl" at line 22, column 7]
----
at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:467) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:389) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:358) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:100) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.DollarVariable.accept(DollarVariable.java:63) ~[freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:366) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:317) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:242) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visitIteratorBlock(Environment.java:642) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:107) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:93) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:330) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:336) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.include(Environment.java:2582) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Include.accept(Include.java:171) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:330) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.visit(Environment.java:336) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.core.Environment.process(Environment.java:309) [freemarker-2.3.28.jar!/:2.3.28]
at freemarker.template.Template.process(Template.java:384) [freemarker-2.3.28.jar!/:2.3.28]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:389) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:302) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:253) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:178) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1371) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1117) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1056) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.boot.actuate.web.trace.servlet.HttpTraceFilter.doFilterInternal(HttpTraceFilter.java:88) [spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:114) [spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:104) [spring-boot-actuator-2.1.6.RELEASE.jar!/:2.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:109) [spring-web-5.1.8.RELEASE.jar!/:5.1.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_212]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_212]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.21.jar!/:9.0.21]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_212]
2019-10-31 21:46:41.917 ERROR 1 --- [nio-8761-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> replica.key [in template "eureka/navbar.ftl" at line 68, column 62]
我尝试了几种配置都没有成功，这是我的尤里卡服务器application.properties
server.port=8761
spring.application.name=eureka
cloud.aws.stack.auto=false
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
eureka.client.service-url.default-zone=http://${eureka.instance.hostname}:${server.port}/eureka/
eureka.client.region=us-east-1
eureka.client.use-dns-for-fetching-service-urls=true
eureka.client.eureka-server-u-r-l-context=eureka
eureka.client.eureka-server-d-n-s-name=eureka.domain.com
eureka.client.eureka-server-port=8761
我还尝试了以下 Eureka 配置选项，但没有成功：
(also tried:
- eureka.client.serviceUrl.defaultZone=
- eureka.client.service-url.us-east-1c=
And also tried values such as:
- http://localhost:8761/eureka/)
终于修好了。
问题是我在 Route53 TXT 记录中根据演示文稿（我现在找不到的研讨会）的建议在开头和结尾留下了 space 并且它导致了问题，一旦删除它正常工作。
我运行输入的是docker容器的名称。容器是tomcat-9.1，我把eureka的url设置成tomcat-9.1:8080然后bang，报错了
所以我将 url 更改为 localhost:8080 并且它已修复。