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Posted to user@karaf.apache.org by Daniel McGreal <d....@gmail.com> on 2016/01/07 16:55:22 UTC

Karaf 'reboot' during feature installation

Hi Karaf users! (Though I think this one is likely for JB…)

I have a reasonably complex application in 4.0.3 which, upon feature:install, causes a reinitialisation of Karaf. It’s only reasonably been the case, but when I run a command like:

feature:install a b c d e f 

via bin/karaf’s console, when the command returns, I get a reprint of the welcome screen. If I execute it via ssh then my SSH connection is dropped and I have to wait till I can reconnect.

Further commands like feature:install, uninstall, etc give me an NPE:

2016-01-07 15:52:40,256 | ERROR | nsole user karaf | ShellUtil                        | 44 - org.apache.karaf.shell.core - 4.0.3 | Exception caught while executing command
java.lang.NullPointerException
	at org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:220)[9:org.apache.karaf.features.core:4.0.3]
	at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:263)[9:org.apache.karaf.features.core:4.0.3]
	at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1079)[9:org.apache.karaf.features.core:4.0.3]
	at org.apache.karaf.features.internal.service.FeaturesServiceImpl$1.call(FeaturesServiceImpl.java:975)[9:org.apache.karaf.features.core:4.0.3]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_65]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_65]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_65]
	at java.lang.Thread.run(Thread.java:745)[:1.8.0_65]


I haven’t attached the logging, because there’s lots of it. Nothing immediately stands out - there aren’t any exceptions or logging before the usual startup logging (talking about locks).

Very best, Dan.

Re: Karaf 'reboot' during feature installation

Posted by Christian Schneider <ch...@die-schneider.net>.
In the case you mention karaf is not completely rebooting. It just restarts
the shell and the ssh server. This happens if some optional dependency of
the shell changes.
Can you try feature:install -v and post the output? It should report what
bundles are refreshed and why.

Christian

2016-01-07 16:55 GMT+01:00 Daniel McGreal <d....@gmail.com>:

> Hi Karaf users! (Though I think this one is likely for JB…)
>
> I have a reasonably complex application in 4.0.3 which, upon
> feature:install, causes a reinitialisation of Karaf. It’s only reasonably
> been the case, but when I run a command like:
>
> feature:install a b c d e f
>
> via bin/karaf’s console, when the command returns, I get a reprint of the
> welcome screen. If I execute it via ssh then my SSH connection is dropped
> and I have to wait till I can reconnect.
>
> Further commands like feature:install, uninstall, etc give me an NPE:
>
> 2016-01-07 15:52:40,256 | ERROR | nsole user karaf | ShellUtil
>            | 44 - org.apache.karaf.shell.core - 4.0.3 | Exception caught
> while executing command
> java.lang.NullPointerException
> at
> org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:220)[9:org.apache.karaf.features.core:4.0.3]
> at
> org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:263)[9:org.apache.karaf.features.core:4.0.3]
> at
> org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1079)[9:org.apache.karaf.features.core:4.0.3]
> at
> org.apache.karaf.features.internal.service.FeaturesServiceImpl$1.call(FeaturesServiceImpl.java:975)[9:org.apache.karaf.features.core:4.0.3]
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_65]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_65]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_65]
> at java.lang.Thread.run(Thread.java:745)[:1.8.0_65]
>
>
> I haven’t attached the logging, because there’s lots of it. Nothing
> immediately stands out - there aren’t any exceptions or logging before the
> usual startup logging (talking about locks).
>
> Very best, Dan.
>



-- 
-- 
Christian Schneider
http://www.liquid-reality.de
<https://owa.talend.com/owa/redir.aspx?C=3aa4083e0c744ae1ba52bd062c5a7e46&URL=http%3a%2f%2fwww.liquid-reality.de>

Open Source Architect
http://www.talend.com
<https://owa.talend.com/owa/redir.aspx?C=3aa4083e0c744ae1ba52bd062c5a7e46&URL=http%3a%2f%2fwww.talend.com>