thnaks for all,
it's clear for me now.

Caldarale, Charles R a ?crit :
>> From: Arnaud MERGEY [mailto:amergey@(protected)]
>> Subject: Re: something wrong creating datasource after war deployement
>>
>> I updated the META-INF/context.xml in the unpacked directory,
>>  
>
> You need to update the one in conf/Catalina/[host], since that overrides
> the ones in the .war and the unpacked directory.
>
>  
>> this is strange because when I update the META-INF/context.xml, I can
>> see newly datasources in the tomcat admin webapps (but with blank
>> driver class and url info).
>>  
>
> It wouldn't surprise me if Tomcat is doing some merging of the two
> <Context> elements, rather than enforcing a complete override.
>
>  
>> If I update META-INF/context.xml in application without war file in
>> webapps, everything works and I can see newly datasources in
>> the tomcat admin webapps with driver class and url.
>>  
>
> Tomcat automatically creates the conf/Catalina/[host]/[appname].xml file
> from META-INF/context.xml only when deploying apps packaged in .war
> files, regardless of the setting of unpackWARs; it does not create one
> in the conf directory for apps that are deployed in an unpacked form,
> although you may place your own in conf/Catalina/[host] to override the
> one in META-INF.
>
> - Chuck
>
>
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