[user experience] command fabric:encrypt-message NullPointerException

Fabric8:karaf@root> encrypt-message **********
Error executing command: java.lang.NullPointerException

2014-12-09 09:51:04,075 | ERROR | l Console Thread | Console                          | ?                                   ? | 28 - org.apache.karaf.shell.console - 2.4.0.redhat-620046 | Exception caught while executing command
java.lang.NullPointerException
        at io.fabric8.zookeeper.utils.ZooKeeperUtils.exists(ZooKeeperUtils.java:277)
        at io.fabric8.commands.EncryptAction.doExecute(EncryptAction.java:56)
        at org.apache.karaf.shell.console.AbstractAction.execute(AbstractAction.java:33)
        at org.apache.felix.gogo.commands.basic.AbstractCommand.execute(AbstractCommand.java:35)
        at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.7.0_72]
        at java.lang.reflect.Method.invoke(Method.java:606)[:1.7.0_72]
        at org.apache.aries.proxy.impl.ProxyHandler$1.invoke(ProxyHandler.java:54)[18:org.apache.aries.proxy.impl:1.0.4]
        at org.apache.aries.proxy.impl.ProxyHandler.invoke(ProxyHandler.java:119)[18:org.apache.aries.proxy.impl:1.0.4]
        at io.fabric8.commands.$Encrypt1285246167.execute(Unknown Source)[mvn:org.apache.aries.proxy/org.apache.aries.proxy.impl/1.0.4:]
        at org.apache.felix.gogo.runtime.CommandProxy.execute(CommandProxy.java:78)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]
        at org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:477)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]
        at org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:403)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]
        at org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]
        at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:183)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]
        at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:120)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]
        at org.apache.felix.gogo.runtime.CommandSessionImpl.execute(CommandSessionImpl.java:92)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]
        at org.apache.karaf.shell.console.jline.Console.run(Console.java:196)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]
        at org.apache.karaf.shell.console.jline.DelayedStarted.run(DelayedStarted.java:79)[28:org.apache.karaf.shell.console:2.4.0.redhat-620046]

Fabric8:karaf@root> fabric:encrypt-message *********
Encrypting message admin
Using algorithm PBEWithMD5AndDES and password ***
Result: git/dKL6roQEAU7zhIhuFA==

Fabric8:karaf@root> fabric:encrypt-message --help
DESCRIPTION
        fabric:encrypt-message

        Encrypts a value using the configured algorithm and master password

SYNTAX
        fabric:encrypt-message [options] message 

ARGUMENTS
        message
                The message to encrypt.

OPTIONS
        -a, --alogrithm
                The algorithm to use. (Defaults to the configured one).
        -p, --password
                The password to use. (Defaults to the configured one).
        --help
                Display this help message