FabricException: Could not acquire port lock for pid org.ops4j.pax.web

11:05:54,978 | WARN  | ssionScavenger-7 | teInvalidatingHashSessionManager | 100 - org.ops4j.pax.web.pax-web-jetty - 3.0.8 | Timing out for 1 session(s) with id b6mk6h6fjpk7tmoqp821k5aj
11:05:54,978 | WARN  | ssionScavenger-7 | teInvalidatingHashSessionManager | 100 - org.ops4j.pax.web.pax-web-jetty - 3.0.8 | Timing out for 1 session(s) with id xl1rr71d3hiiiaatsbrjmaxl
11:06:17,892 | INFO  | a]-nio2-thread-3 | ShellCommandFactory              | 49 - org.apache.karaf.shell.ssh - 2.3.0.redhat-611454 | 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$2.getValue(FabricServiceImpl.java:1075)
	at io.fabric8.zookeeper.utils.InterpolationHelper.substVars(InterpolationHelper.java:178)
	at io.fabric8.service.FabricServiceImpl.substituteConfigurations(FabricServiceImpl.java:1071)
	at io.fabric8.internal.ProfileOverlayImpl.getConfigurations(ProfileOverlayImpl.java:358)
	at io.fabric8.internal.ProfileOverlayImpl.getConfiguration(ProfileOverlayImpl.java:368)
	at io.fabric8.internal.ContainerImpl.isManaged(ContainerImpl.java:149)
	at io.fabric8.commands.support.CommandUtils.status(CommandUtils.java:176)
	at io.fabric8.commands.ContainerList.printContainers(ContainerList.java:98)
	at io.fabric8.commands.ContainerList.doExecute(ContainerList.java:73)
	at org.apache.karaf.shell.console.OsgiCommandSupport.execute(OsgiCommandSupport.java:39)
	at org.apache.felix.gogo.commands.basic.AbstractCommand.execute(AbstractCommand.java:35)
	at org.apache.felix.gogo.runtime.CommandProxy.execute(CommandProxy.java:78)
	at org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:477)
	at org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:403)
	at org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)
	at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:183)
	at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:120)
	at org.apache.felix.gogo.runtime.CommandSessionImpl.execute(CommandSessionImpl.java:89)
	at org.apache.karaf.shell.ssh.ShellCommandFactory$ShellCommand$1.run(ShellCommandFactory.java:117)
	at java.security.AccessController.doPrivileged(Native Method)[:1.7.0_79]
	at org.apache.karaf.jaas.modules.JaasHelper.doAs(JaasHelper.java:67)
	at org.apache.karaf.shell.ssh.ShellCommandFactory$ShellCommand.start(ShellCommandFactory.java:115)
	at org.apache.sshd.server.channel.ChannelSession.handleExec(ChannelSession.java:422)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.server.channel.ChannelSession.handleRequest(ChannelSession.java:304)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.server.channel.ChannelSession$ChannelSessionRequestHandler.process(ChannelSession.java:576)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.server.channel.ChannelSession$ChannelSessionRequestHandler.process(ChannelSession.java:574)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.channel.AbstractChannel.handleRequest(AbstractChannel.java:96)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.session.AbstractConnectionService.channelRequest(AbstractConnectionService.java:261)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.session.AbstractConnectionService.process(AbstractConnectionService.java:139)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.session.AbstractSession.doHandleMessage(AbstractSession.java:399)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.session.AbstractSession.handleMessage(AbstractSession.java:295)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.session.AbstractSession.decode(AbstractSession.java:731)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.session.AbstractSession.messageReceived(AbstractSession.java:277)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:54)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:187)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:173)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at org.apache.sshd.common.io.nio2.Nio2CompletionHandler$1.run(Nio2CompletionHandler.java:32)
	at java.security.AccessController.doPrivileged(Native Method)[:1.7.0_79]
	at org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:30)[337:org.apache.sshd.core:0.12.0.redhat-002]
	at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)[:1.7.0_79]
	at sun.nio.ch.Invoker$2.run(Invoker.java:218)[:1.7.0_79]
	at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)[:1.7.0_79]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[:1.7.0_79]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[:1.7.0_79]
	at java.lang.Thread.run(Thread.java:745)[:1.7.0_79]