我在尝试执行grails run-war时看到以下错误消息。它适用于grails run-app。后来我意识到它不仅与grails有关。即使我创建war并将其部署在tomcat上，我也会看到相同的错误消息。但不确定如何调试更多。看起来与tomcat默认jar有些冲突。
Grails version: 2.5.2 Tomcat Version: `build ":tomcat:7.0.55.3"` |Done creating WAR target/ROOT.war |Running Grails application A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[/sms]] at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[/sms]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) ... 6 more Caused by: java.lang.NullPointerException at org.springframework.boot.cli.app.SpringApplicationWebApplicationInitializer.getSources(SpringApplicationWebApplicationInitializer.java:62) at org.springframework.boot.cli.app.SpringApplicationWebApplicationInitializer.onStartup(SpringApplicationWebApplicationInitializer.java:48) at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5479) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 6 more A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]] at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341) at org.grails.plugins.tomcat.fork.TomcatWarRunner.doStart(TomcatWarRunner.groovy:114) 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:497) at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210) at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:59) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:52) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:154) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:182) at org.grails.plugins.tomcat.TomcatServer.start(TomcatServer.groovy:141) at grails.web.container.EmbeddableServer$start.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133) at org.grails.plugins.tomcat.fork.ForkedTomcatServer.runInternal(ForkedTomcatServer.groovy:86) at org.grails.plugins.tomcat.fork.ForkedTomcatServer.run(ForkedTomcatServer.groovy:66) at org.grails.plugins.tomcat.fork.ForkedTomcatServer$run.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117) at org.grails.plugins.tomcat.fork.ForkedTomcatServer.main(ForkedTomcatServer.groovy:60) Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.catalina.LifecycleException: A child container failed during start at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 6 more | Error Error loading Tomcat: Failed to start component [StandardServer[-1]] (Use --stacktrace to see the full trace) Error | Forked Grails VM exited with error
答案 0 :(得分：1)
最后意识到spring-boot-cli-1.3.1.RELEASE.jar jar造成了这个麻烦。我认为这是作为以下依赖项的一部分下载的。
<dependency>
<groupId>org.grails</groupId>
<artifactId>gorm-hibernate4-spring-boot</artifactId>
<version>5.0.8.RELEASE</version>
</dependency>
将上述内容更改为以下解决了该问题。
<dependency>
<groupId>org.grails</groupId>
<artifactId>gorm-hibernate4-spring-boot</artifactId>
<version>5.0.8.RELEASE</version>
<scope>provided</scope>
</dependency>
我认为这个jar与tomcat启动过程相冲突。有关更多信息，请遵循以下主题。
A child container failed during start java.util.concurrent.ExecutionException