在 Elastic Beanstalk 上将 Grails 3 应用程序部署到 Tomcat 8

Question

我正在尝试将 Grails 3 应用程序部署到 Elastic Beanstalk 上的 Tomcat 8 实例，并且我尝试了一些我在 Google 和 Stack Exchange 上找到的东西，包括更改“org.springframework.boot:spring -boot-starter-tomcat”从“编译”到“提供”的依赖关系不起作用。 Elastic Beanstalk 将接受 war 文件，但随后只显示一个空白页面。

我打开Grails生成的war文件，发现基础目录中没有index.jsp文件，WEB-INF下没有web.xml文件。这两个都存在于我使用 Maven 网络应用原型制作的简单战争文件中，该文件有效，所以我有两个问题：

1) 有其他人将应用程序从最新版本的 Grails 部署到 Tomcat 8 吗？尤其是在 Elastic Beanstalk 上，尤其是最近？我从谷歌搜索中找到的大多数答案都是旧的，所以我想可能是新版本发生了一些变化。

2) 查看 Tomcat 8 在打开 WAR 文件并加载它时所经历的过程的最佳参考是什么？我想如果我能深入挖掘这个过程，我就能找出缺失的部分在哪里。

Answer 1

@John Stanford，我发现同样的问题我的 grails 版本是 3.2.3

我在本地测试了部署到我的tomcat8，发现我的数据源配置导致了这个问题，我的grails应用程序只是虚拟应用程序，不需要数据库连接，

日志/var/lib/tomcat8/logs/catalina.2017-xx-xx.log如下所示

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'grailsCacheFilter': Cannot create inner bean '(inner bean)#7cbf54fc' of type [grails.plugin.cache.web.filter.simple.MemoryPageFragmentCachingFilter] while setting bean property 'filter'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name '(inner bean)#7cbf54fc': Unsatisfied dependency expressed through method 'setUrlMappingsHandlerMapping' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'urlMappingsHandlerMapping': Unsatisfied dependency expressed through method 'setWebRequestInterceptors' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'openSessionInViewInterceptor': Cannot resolve reference to bean 'hibernateDatastore' while setting bean property 'hibernateDatastore'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateDatastore': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.grails.orm.hibernate.HibernateDatastore]: Constructor threw exception; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:313)
        at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:129)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1486)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1231)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)

所以我注释掉application.yml的production.dataSource.url

environments:
    development:
        dataSource:
            dbCreate: create-drop
            url: jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
    test:
        dataSource:
            dbCreate: update
            url: jdbc:h2:mem:testDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
    production:
        grails:
            serverURL: http://xxx-evn-yyy-zzzz-aws-zone-2.elasticbeanstalk.com
        dataSource:
            dbCreate: none
            #url: jdbc:h2:./prodDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
            properties:
                jmxEnabled: true
                initialSize: 5
                maxActive: 50
                minIdle: 5
                maxIdle: 25
                maxWait: 10000

最后部署到 AWS Beanstalk 就可以了！