[KARAF-7752] Several Webconsole sections stopped working

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 4.4.4
• Component/s: webconsole

Environment

Apache Karaf 4.4.4 (binary release), Java 17, Alpine Linux x86-64.

Executed commands: feature install http webconsole

$ java -version
openjdk version "17.0.8" 2023-07-18
OpenJDK Runtime Environment (build 17.0.8+7-alpine-r2)
OpenJDK 64-Bit Server VM (build 17.0.8+7-alpine-r2, mixed mode, sharing)

$ uname -a

Linux cinder 6.1.53-0-lts #1-Alpine SMP PREEMPT_DYNAMIC Wed, 13 Sep 2023 12:45:27 +0000 x86_64 GNU/Linux

• Assignee: Jean-Baptiste Onofré
• Reporter: M. Gomes (Celfocus)
• Created: 19/Sep/23 13:30
• Updated: 15/Dec/23 10:19
• Resolved: 15/Dec/23 10:19

Description

Starting with Karaf 4.4.4 several webconsole pages no longer work:

• Main > Features (blank content)
• Main > Gogo (blank content)
• Main > HTTP (blank content)
• Main > Instances (blank content)
• OSGi > Events (500 error, see below)
• Other felix webconsole components also give a 500 error

In the case of the 500 error the content is:

HTTP ERROR 500 java.lang.NullPointerException: Cannot invoke "javax.servlet.ServletConfig.getServletName()" because the return value of "org.apache.felix.webconsole.internal.WebConsolePluginAdapter.getServletConfig()" is null

URI:	/system/console/events
STATUS:	500
MESSAGE:	java.lang.NullPointerException: Cannot invoke "javax.servlet.ServletConfig.getServletName()" because the return value of "org.apache.felix.webconsole.internal.WebConsolePluginAdapter.getServletConfig()" is null
SERVLET:	org.apache.felix.webconsole.internal.servlet.KarafOsgiManager
CAUSED BY:	java.lang.NullPointerException: Cannot invoke "javax.servlet.ServletConfig.getServletName()" because the return value of "org.apache.felix.webconsole.internal.WebConsolePluginAdapter.getServletConfig()" is null

Issue Links

• is duplicated by: KARAF-7769 Karaf webconsole plugins don't work since Felix WebConsole update