[jira] [Created] (KARAF-3500) NPE throws when executing "bin/client shutdown"

["Freeman Fang (JIRA)" <ji...@apache.org>]

Freeman Fang created KARAF-3500:
-----------------------------------

             Summary: NPE throws when executing "bin/client shutdown"
                 Key: KARAF-3500
                 URL: https://issues.apache.org/jira/browse/KARAF-3500
             Project: Karaf
          Issue Type: Improvement
            Reporter: Freeman Fang


when use bin/client shutdown we get NPE in log
{code}
13:25:41,548 | INFO  | pool-16-thread-2 | ShellCommandFactory              | 49 - org.apache.karaf.shell.ssh - 2.3.0| Exception caught while executing command

java.lang.NullPointerException

	at org.apache.karaf.shell.osgi.Shutdown.doExecute(Shutdown.java:83)

	at org.apache.karaf.shell.console.OsgiCommandSupport.execute(OsgiCommandSupport.java:39)

	at org.apache.felix.gogo.commands.basic.AbstractCommand.execute(AbstractCommand.java:35)

{code}


and get 
{code}
Error executing command: java.lang.NullPointerException
{code}

Too avoid the NPE, we should return some meaningful prompt message



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