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From Jean-Baptiste Onofré ...@nanthrax.net>
Subject Re: NPE with command Help & Karaf Shell Console
Date Fri, 29 Nov 2013 09:31:29 GMT
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 Onofré
jbonofre@apache.org
http://blog.nanthrax.net
Talend - http://www.talend.com

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