the karaf management bundle (or the karaf ssh bundle) sometimes will be on the GracePeriod after start karaf container.
[ 17] [Active ] [GracePeriod ] [ ] [ 30] Apache Karaf :: Shell :: SSH (2.3.0)
[ 18] [Active ] [GracePeriod ] [ ] [ 30] Apache Karaf :: Management (2.3.0)
and got the blueprint timeout exceptions in the karaf.log (attached)
if then refresh the bundles manually:
then, everything will be ok.