route-list in apache-karaf does not work

[Jörg Jansen <Jo...@inform-software.com>]

Hi everybody, 

I'm running camel (3.7.0) in a karaf container (4.3.0).
When trying to list all routes with command route-list, I receive the following error message: 

      Error executing command: Cannot invoke "org.apache.camel.api.management.mbean.ManagedRouteMBean.getExchangesTotal()" because "mr" is null

Stacktrace: 
15:41:35.669 ERROR [Karaf local console user karaf] Exception caught while executing command
java.lang.NullPointerException: Cannot invoke "org.apache.camel.api.management.mbean.ManagedRouteMBean.getExchangesTotal()" because "mr" is null
        at org.apache.camel.commands.AbstractLocalCamelController.getRoutes(AbstractLocalCamelController.java:291) ~[?:?]
        at org.apache.camel.commands.AbstractLocalCamelController.getRoutes(AbstractLocalCamelController.java:306) ~[?:?]
        at org.apache.camel.commands.AbstractLocalCamelController.getRoutes(AbstractLocalCamelController.java:271) ~[?:?]
        at org.apache.camel.commands.RouteListCommand.execute(RouteListCommand.java:54) ~[?:?]
        at org.apache.camel.karaf.commands.RouteList.execute(RouteList.java:39) ~[?:?]
        at org.apache.karaf.shell.impl.action.command.ActionCommand.execute(ActionCommand.java:84) ~[?:?]
        at org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:68) ~[?:?]
        at org.apache.karaf.shell.impl.console.osgi.secured.SecuredCommand.execute(SecuredCommand.java:86) ~[?:?]
        at org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:599) ~[?:?]
        at org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:526) ~[?:?]
        at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:415) ~[?:?]
        at org.apache.felix.gogo.runtime.Pipe.doCall(Pipe.java:416) ~[?:?]
        at org.apache.felix.gogo.runtime.Pipe.call(Pipe.java:229) ~[?:?]
        at org.apache.felix.gogo.runtime.Pipe.call(Pipe.java:59) ~[?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[?:?]
        at java.lang.Thread.run(Thread.java:832) [?:?]

Maybe I'm missing something. 
Does anybody has an idea, what the reason could be.

Thanks in advance,
Jörg