philthomas26 philthomas26 - 1 month ago 17
Java Question

Deploy Spring Boot to Tomcat

So I am new to Spring - so I thought I would try Spring Boot

I am using a Maven to build - I set up a view requests, when I run it as "App" looks like it starts tomcat up itself and i have a service at default 8080 port, so when I call

localhost:8080/service
it's all good.

However when i try to package it up as a WAR to deploy to a server it doesn't work

So i thought i would go back to basics and deploy it onto my tomcat server locally and see what happens

So first off nothing happened - 404 - did a bit of googling at found out i need to include a web entry point like this - here's my main class

@ComponentScan
@EnableAutoConfiguration
public class App extends SpringBootServletInitializer
{

public static void main( String[] args ) {
SpringApplication.run(App.class, args);
}

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(appClass);
}

private static Class<App> appClass = App.class;
}


so it looked like it worked, in the console i could see the red catalina startup text, then i saw the Spring boot start up (which i wasn't seeing before)

however when i try and call the service
localhost:8080/service
i still get a 404

when i run it as "App" it works a treat

is there something obvious i need to be doing ? to create the war i just


  1. changed the pom xml package type to war

  2. included the override in the code snippet above

  3. exported as a war



i have unzipped the WAR and it looked fine - there is a WEB-INF and a set of dependencies, etc.

any help would be good - as anyone had similar problems when deploying spring boot apps as a WAR?

***UPDATE****

Now i can get my war to deploy correctly on my local Tomcat 7 server - but when i try and deploy to an externally hosted Tomcat container i get

at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5262)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 15 more
Jul 14, 2014 1:49:01 PM org.apache.catalina.startup.HostConfig deployDirectory
SEVERE: Error deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/cookpot
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/cookpot]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:898)
at org.apache.catalina.core.ContainerBase.access$000(ContainerBase.java:130)
at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:153)
at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:142)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:869)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Jul 14, 2014 1:49:01 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/examples
Jul 14, 2014 1:49:01 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/host-manager
Jul 14, 2014 1:49:01 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/CookPot
Jul 14, 2014 1:49:02 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(/usr/local/shared/tomcat/thecookpot/webapps/CookPot/WEB-INF/lib/tomcat-embed-core-7.0.52.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
Jul 14, 2014 1:49:02 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(/usr/local/shared/tomcat/thecookpot/webapps/CookPot/WEB-INF/lib/tomcat-embed-el-7.0.52.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/el/Expression.class
Jul 14, 2014 1:49:06 PM org.apache.catalina.core.ContainerBase addChildInternal
SEVERE: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CookPot]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895)
at org.apache.catalina.core.ContainerBase.access$000(ContainerBase.java:130)
at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:153)
at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:142)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:869)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.security.AccessControlException: access denied (java.util.PropertyPermission java.awt.headless write)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.System.setProperty(System.java:727)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:263)
at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:130)
at org.springframework.boot.context.web.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:89)
at org.springframework.boot.context.web.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:51)
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:175)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5262)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 15 more
Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory
SEVERE: Error deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/CookPot
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CookPot]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:898)
at org.apache.catalina.core.ContainerBase.access$000(ContainerBase.java:130)
at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:153)
at org.apache.catalina.core.ContainerBase$PrivilegedAddChild.run(ContainerBase.java:142)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:869)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/ROOT
Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/manager
Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/docs
Jul 14, 2014 1:49:06 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/shared/tomcat/thecookpot/webapps/Cookpot
Jul 14, 2014 1:49:06 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(/usr/local/shared/tomcat/thecookpot/webapps/Cookpot/WEB-INF/lib/tomcat-embed-core-7.0.52.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
Jul 14, 2014 1:49:06 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(/usr/local/shared/tomcat/thecookpot/webapps/Cookpot/WEB-INF/lib/tomcat-embed-el-7.0.52.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/el/Expression.class
Jul 14, 2014 1:49:09 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-6350"]
Jul 14, 2014 1:49:09 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-4350"]
Jul 14, 2014 1:49:09 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 17529 ms

Answer

The chapter Packaging executable jar and war files in the Spring Boot reference documentation states:

To build a war file that is both executable and deployable into an external container you need to mark the embedded container dependencies as “provided”, e.g:

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <!-- ... -->
    <packaging>war</packaging>
    <!-- ... -->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <!-- ... -->
    </dependencies>
</project>