KB484029: Deploying Community Connectors on Tomcat results in a org.apache.catalina.LifecycleException error

Description

When trying to deploy Community Connectors on Tomcat, you may receive the following error message: 

SEVERE [localhost-startStop-2] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start:org.apache.catalina.LifecycleException: Failed to start component[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CommunityConnectors]][…]Caused by: java.lang.IllegalArgumentException: More than one fragment with the name [spring_web] was found. This is not legal with relative ordering. See section 8.2.2 2c of the Servlet specification for details. Consider using absolute ordering.[…]

 

Why is this happening? 

This error is occurring because of conflicting web-fragments' names. 
 

Solution

To resolve this issue, you are required to use absolute ordering of deployment descriptors. To do that, follow these steps:

1. Shut down Tomcat.
2. Delete the

   CommunityConnectors.war

   file under Webapps. Leave the unpacked CommunityConnectors folder.
3. Delete the work folder within Tomcat to clear all Tomcat caches.
4. Open

   /Webapps/CommunityConnectors/WEB-INF/web.xml.

5. After the

   </display-name>

   closed tag, add the line following line:

   <absolute-ordering />

6. Start Tomcat.