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https://issues.apache.org/jira/browse/ARIES-1600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15683960#comment-15683960
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Panos Kavalagios commented on ARIES-1600:
-----------------------------------------

Tested successfully on Apache Karaf version 4.0.6 with the following:

{code:none}
bundle:uninstall org.apache.aries.jpa.blueprint
bundle:install -s mvn:org.apache.aries.jpa/org.apache.aries.jpa.blueprint/2.5.0
{code}

the list command displays:

{code:none}
START LEVEL 100 , List Threshold: 50
 ID | State  | Lvl | Version             | Name
134 | Active |  80 | 2.5.0               | Apache Aries JPA blueprint
{code}

the exception is not reported.

> 'Unknown namespace for jpa' in JpaNsHandler
> -------------------------------------------
>
>                 Key: ARIES-1600
>                 URL: https://issues.apache.org/jira/browse/ARIES-1600
>             Project: Aries
>          Issue Type: Bug
>          Components: JPA
>    Affects Versions: jpa-2.4.0
>            Reporter: Rafael Bedia
>            Assignee: Christian Schneider
>             Fix For: jpa-2.5.0
>
>         Attachments: unknown-namespace-error.txt
>
>
> The IllegalArgumentException "Unknown namespace for jpa: " is being triggered 
> in org.apache.aries.jpa.blueprint.impl.JpaNsHandler.getSchemaLocation.
> The bundle I am deploying has several extension namespaces defined in the 
> Blueprint XML. I don't have a minimal example that exhibits this problem but 
> I might be able to create one if necessary.
> I'm not sure why the JpaNsHandler is being passed a namespace that it can't 
> handle. However all other implementations of NamespaceHandler that I have 
> seen return null if they are passed a namespace they do not recognize. When I 
> replaced the IllegalArgumentException with returning null the bundle 
> successfully started.
> This is related to ARIES-1403.



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