"container-list" command causes container to hang with exception "Could not acquire port lock"

Issue

Whilst Fuse was running, when we were triggering "Container-list" on the root node. It got hanged with following exception and as a work around we took a manual fuse restart. This also followed profiles removal and addition to bring up the container on previous state.

2016-02-15 05:12:03,092 | INFO  | Thread-134681    | Console                          | araf.shell.console.jline.Console  220 | 17 - org.apache.karaf.shell.console - 2.3.0.redhat-611429 | Exception caught while executing command
io.fabric8.api.FabricException: Could not acquire port lock for pid org.ops4j.pax.web
        at io.fabric8.service.ZookeeperPortService.registerPort(ZookeeperPortService.java:95)
        at io.fabric8.service.PortPlaceholderResolver.resolve(PortPlaceholderResolver.java:79)
        at io.fabric8.service.FabricServiceImpl$2.getValue(FabricServiceImpl.java:1075)
        at io.fabric8.zookeeper.utils.InterpolationHelper.substVars(InterpolationHelper.java:178)
        at io.fabric8.service.FabricServiceImpl.substituteConfigurations(FabricServiceImpl.java:1071)
        at io.fabric8.internal.ProfileOverlayImpl.getConfigurations(ProfileOverlayImpl.java:358)
        at io.fabric8.internal.ProfileOverlayImpl.getConfiguration(ProfileOverlayImpl.java:368)
        at io.fabric8.internal.ContainerImpl.isManaged(ContainerImpl.java:149)
        at io.fabric8.commands.support.CommandUtils.status(CommandUtils.java:176)
        at io.fabric8.commands.ContainerList.printContainers(ContainerList.java:98)
        at io.fabric8.commands.ContainerList.doExecute(ContainerList.java:73)