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Date: Fri, 29 Nov 2013 10:32:58 +0100
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Subject: Re: NPE with command Help & Karaf Shell Console
From: Charles Moulliard <ch007m@gmail.com>
To: dev@karaf.apache.org
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2.3.3


On Fri, Nov 29, 2013 at 10:31 AM, Jean-Baptiste Onofr=E9 <jb@nanthrax.net>w=
rote:

> Hi Charles,
>
> what's the Karaf version (as it changed between 2.x and 3.x) ?
>
> Regards
> JB
>
>
> On 11/29/2013 10:18 AM, Charles Moulliard wrote:
>
>> Hi,
>>
>> For a documentation project, I'm currently creating a Java Command Line
>> Tool client using our excellent Apache Karaf Shell Console. Nevertheless=
,
>> when I try to get help from a command, Gogo & Felix returns a NPE
>>
>> HylaMain
>> java.io.BufferedInputStream@9506dc4
>> hyla>echo blabla
>> echo blabla
>> blabla
>> hyla>help echo
>> help echo
>> [main] ERROR org.apache.karaf.shell.console.jline.Console - Exception
>> caught while executing command
>> java.lang.NullPointerException
>> at
>> org.apache.karaf.shell.console.help.HelpAction.
>> doExecute(HelpAction.java:40)
>> at
>> org.apache.karaf.shell.console.AbstractAction.
>> execute(AbstractAction.java:33)
>> at
>> org.apache.felix.gogo.commands.basic.AbstractCommand.execute(
>> AbstractCommand.java:35)
>> at org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:474)
>> at org.apache.felix.gogo.runtime.Closure.executeStatement(
>> Closure.java:400)
>> 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.console.jline.Console.run(Console.java:173)
>> at org.apache.karaf.shell.console.Main.run(Main.java:220)
>> at org.apache.karaf.shell.console.Main.run(Main.java:164)
>> at org.apache.karaf.shell.console.Main.run(Main.java:79)
>> at com.redhat.gpe.hyla.tooling.HylaMain.main(HylaMain.java:34)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(
>> NativeMethodAccessorImpl.java:39)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(
>> DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
>> Error executing command: java.lang.NullPointerException
>>
>> As this code is really hard to debug as we have embedded the code of
>> org.apache.felix.gogo.runtime
>> & org.apache.felix.gogo.commands in the jar of Karaf Shell Console, does
>> anybody knows why I could get a NPE when we call this method. In debug
>> mode, I confirm that the session object exists but the command is null
>> (even if I'm able to recuperate the args 'help echo' and this command
>> works
>> 'echo blabla'
>>
>> Regards,
>>
>>
> --
> Jean-Baptiste Onofr=E9
> jbonofre@apache.org
> http://blog.nanthrax.net
> Talend - http://www.talend.com
>


--=20
Charles Moulliard
Apache Committer / Architect @RedHat
Twitter : @cmoulliard | Blog :  http://cmoulliard.github.io

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