[Yanel-dev] Navigation Resource

[basZero]

Thanks !!

On Thu, Jun 30, 2011 at 10:53 AM, Michael Wechner <michael.wechner at wyona.com
> wrote:

> **
> Am 30.06.11 09:45, schrieb basZero:
>
> Hi Michi,
>
>  we just had a little incident where for a certain unknown reason the
> header section of the page (Navigation) could not be rendered.
>
>  In the log, I see this Nullpointer:
>  65195001 2011-06-30 09:27:28,215 [http-80-103] ERROR
> org.wyona.yanel.impl.resources.navigation.NavigationResource.getView():220
>  - java.lang.NullPointerException (/de/header.yanel, Name: Zwischengas, ID:
> zwischengas, Mount-Point: /, No reverse proxy set)
> java.lang.NullPointerException
>  at
> org.wyona.yanel.impl.resources.navigation.NavigationResource.getOS(NavigationResource.java:374)
>
>
>
> we can make this method more fail safe inside
>
>
> src/resources/navigation/src/java/org/wyona/yanel/impl/resources/navigation/NavigationResource.java
>
> by checking first if the userAgent is not null, whereas it is odd that it
> is null.
>
> Anyway this should be improved now:
>
> Sending
> src/resources/navigation/src/java/org/wyona/yanel/impl/resources/navigation/NavigationResource.java
> Transmitting file data .
> Committed revision 59043.
>
> HTH
>
> Michael
>
>
>   at
> org.wyona.yanel.impl.resources.navigation.NavigationResource.getView(NavigationResource.java:173)
>  at
> org.wyona.yanel.impl.resources.navigation.NavigationResource.getView(NavigationResource.java:98)
>  at
> org.wyona.yanel.core.source.ResourceResolver.resolve(ResourceResolver.java:75)
>  at
> org.wyona.yanel.core.source.SourceResolver.resolve(SourceResolver.java:67)
>  at
> org.wyona.yanel.core.transformation.XIncludeTransformer.startElement(XIncludeTransformer.java:67)
>  at
> org.apache.xml.serializer.ToXMLSAXHandler.closeStartTag(ToXMLSAXHandler.java:204)
>  at
> org.apache.xml.serializer.ToSAXHandler.flushPending(ToSAXHandler.java:277)
>  at
> org.apache.xml.serializer.ToXMLSAXHandler.endElement(ToXMLSAXHandler.java:243)
>  at
> org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1399)
>  at
> org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2411)
>  at
> org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1374)
>  at
> org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2411)
>  at
> org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:1374)
>  at
> org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2411)
>  at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:392)
>
>
>  My opinion is: there can't be a Nullpointer Exception at that location
> when the getOS() method is called from the getView() method, because
> getView() makes sure that no null is passed into getOS().
>
>  How do you explain this? Any idea?
>
>  However, the system gets halted due to this error for some seconds (in
> the case today for 10 seconds), recovers and continues to work fine.
>
>  Cheers
> Balz
>
>
>
> --
> Yanel-development mailing list Yanel-development at wyona.com
> http://lists.wyona.org/cgi-bin/mailman/listinfo/yanel-development
>
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