[KARAF-7400] WebContainer NullPointerException on deploying Spring Boot WAR sample application

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 4.3.6
• Component/s: karaf
• Assignee: Jean-Baptiste Onofré
• Reporter: Mariano Eloy Fernández
• Created: 06/Mar/22 10:42
• Updated: 28/Mar/24 13:17

Description

I am following the steps on https://karaf.apache.org/manual/latest/webcontainer to deploy a simple Spring Booot WAR.

I download the Spring Booot sample from https://start.spring.io/ and mvn install it.

Then I execute:

bundle:install -s "webbundle:mvn:org.example.osgi/spring.boot.demo.three/0.0.1-SNAPSHOT/war?Bundle-SymbolicName=demo-three&Web-ContextPath=/three"

I get this error:

10:31:34.124 INFO  [paxweb-extender-1-thread-1] will add org.apache.jasper.servlet.JasperInitializer to ServletContainerInitializers                                                         
10:31:34.124 INFO  [paxweb-extender-1-thread-1] Skipt org.apache.jasper.servlet.JasperInitializer, because specialized handler will be present
10:31:34.124 INFO  [paxweb-extender-1-thread-1] will add org.eclipse.jetty.websocket.server.NativeWebSocketServletContainerInitializer to ServletContainerInitializers
10:31:34.125 INFO  [paxweb-extender-1-thread-1] added ServletContainerInitializer: org.eclipse.jetty.websocket.server.NativeWebSocketServletContainerInitializer
10:31:34.125 INFO  [paxweb-extender-1-thread-1] will add org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer to ServletContainerInitializers
10:31:34.267 ERROR [paxweb-extender-1-thread-1] Exception starting HttpContext registration
java.lang.NullPointerException
10:31:34.267 ERROR [paxweb-extender-1-thread-1] Error deploying web application
java.lang.NullPointerExceptio

There is no hint on what is causing this NullPointerException. I tried to log:set TRACE but it still gives no further information.

My ultimate goal is to deploy several Spring Boot apps as WARs to let Karaf's Jetty route calls to these apps based on their context-path.