在Tomcat上部署Grails应用程序很慢(Deploying Grails applications on Tomcat is slow)

 我使用Grails框架 （版本2.3.7）开发了许多不同的Web服务。 每个Web服务都做不同的事情，有些简单，有些更复杂。 有些只有少数依赖项（插件等），其他有很多。 
 
 为了生产，我在Tomcat 7上部署每个服务/应用程序，每个服务/应用程序位于不同的VM上。 为此，我首先构建一个WAR： 
 
> grails war
 
 然后我在Tomcat上部署WAR作为ROOT应用程序（ /var/lib/tomcat7/webapps/ROOT.war ）。 这很好用。 
 
 但是，当（重新）启动Tomcat时，部署应用程序通常需要2-7分钟，有时甚至更多。 我没有注意到应用程序的复杂性和部署时间之间存在真正的相关性。 
 
 这个漫长的部署时间有什么原因？ 我应该怎么看才能加速Tomcat 7上的Grails应用程序部署？ 
 
 或者这正是我应该期待的，我应该学会忍受它？ 

I have a number of different web services developed using the Grails framework (version 2.3.7). Each web service does different things, some simple, some more complex. Some have only a few dependencies (plugins etc.), others many. 
 
For production, I deploy each service/application on Tomcat 7, each on a different VM. To do this, I first build a WAR: 
 
> grails war
 
and then I deploy the WAR on Tomcat as the ROOT application (/var/lib/tomcat7/webapps/ROOT.war). This works just fine. 
 
But, when (re-)starting Tomcat, it often takes between 2-7 minutes to deploy the application, sometimes more. I haven't noticed a real correlation between the complexity of the application and the deployment time. 
 
What could the reason be for this lengthy deployment time? What should I look at to try to speed up Grails application deployments on Tomcat 7? 
 
Or is this just what I should expect and I should learn to live with it? 

原文：https://stackoverflow.com/questions/29045002