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Re: [tycho-user] [nexus-user] how to get eclipse repos fixed? 
Tycho does not introduce arbitrary dependency requirements, this
installable unit must be required by one of your projects, otherwise
Tycho would not complain about it. There is not way to suppress this
kind of errors.

I just checked and I see both org.eclipse.pde.ua.ui and
org.eclipse.pde.ua.ui.source 1.0.300.v20130830-1837 are present in the
repository. So this particular problem must be specific to your environment.

Not sure if this affects other developers, but I find Eclipse repository
mirrors exceptionally unreliable and always tell Tycho to download from
the main repository directly. Nexus p2 proxy implementation is supposed
to fallback to main repository automatically, but I have not checked if
this logic still works.

I am not aware of any tool to verify consistency of p2 repositories.

I don't know how/where to report this kind of problems.

--
Regards,
Igor

On 12/19/2013, 17:05, Russ Tremain wrote:

Hi,

I have a build using the tycho plugin to pull down p2 content from
http://download.eclipse.org/releases/staging/ and it appears that:

     org.eclipse.pde.ua.ui_1.0.300.v20130830-1837.jar

is missing from that repository, but there are still references to it in
content.xml:

     <unit id="org.eclipse.pde.ua.ui.source" singleton="false"
version="1.0.300.v20130830-1837">
       <update id="org.eclipse.pde.ua.ui.source"
range="[0.0.0,1.0.300.v20130830-1837)" severity="0" />
       <properties size="9">
         <property name="df_LT.bundleVendor" value="Eclipse.org" />
         <property name="df_LT.bundleName" value="PDE UA UI Source" />
         <property name="org.eclipse.equinox.p2.name"
value="%bundleName" />
         <property name="org.eclipse.equinox.p2.provider"
value="%bundleVendor" />
         <property name="org.eclipse.equinox.p2.bundle.localization"
value="OSGI-INF/l10n/bundle-src" />
         <property name="maven-groupId" value="org.eclipse.pde" />
         <property name="maven-artifactId" value="org.eclipse.pde.ua.ui" />
         <property name="maven-version" value="1.0.300-SNAPSHOT" />
         <property name="maven-classifier" value="sources" />
       </properties>
       <provides size="4">
         <provided name="org.eclipse.pde.ua.ui.source"
version="1.0.300.v20130830-1837" namespace="org.eclipse.equinox.p2.iu" />
         <provided name="org.eclipse.pde.ua.ui.source"
version="1.0.300.v20130830-1837" namespace="osgi.bundle" />
         <provided name="source" version="1.0.0"
namespace="org.eclipse.equinox.p2.eclipse.type" />
         <provided name="df_LT" version="1.0.0"
namespace="org.eclipse.equinox.p2.localization" />
       </provides>
       <artifacts size="1">
         <artifact id="org.eclipse.pde.ua.ui.source"
classifier="osgi.bundle" version="1.0.300.v20130830-1837" />
       </artifacts>
       <touchpoint id="org.eclipse.equinox.p2.osgi" version="1.0.0" />
       <touchpointData size="1">
         <instructions size="1">
           <instruction key="manifest">Bundle-SymbolicName:
org.eclipse.pde.ua.ui.source
Bundle-Version: 1.0.300.v20130830-1837</instruction>
         </instructions>
       </touchpointData>
     </unit>

Maven throws an error because it can't download the artifact (from nexus
in this case):

[ERROR] Internal error: java.lang.RuntimeException:
"Messages while reading artifacts from child repositories":
["Messages while reading artifacts from child repositories":
["Problems while reading artifacts from
http://localhost:8080/nexus/content/repositories/eclipse-4.4-I-builds":
["HTTP Server 'Internal Error':
http://localhost:8080/nexus/content/repositories/eclipse-4.4-I-builds/plugins/org.eclipse.pde.ua.ui_1.0.300.v20130830-1837.jar";],

"Problems while reading artifacts from
http://localhost:8080/nexus/content/repositories/eclipse_release_staging":
["HTTP Server 'Internal Error':
http://localhost:8080/nexus/content/repositories/eclipse_release_staging/plugins/org.eclipse.pde.ua.ui_1.0.300.v20130830-1837.jar";],

"Messages while reading artifacts from child repositories":
["Problems while reading artifacts from
http://localhost:8080/nexus/content/repositories/eclipse_release_staging":
["HTTP Server 'Internal Error':
http://localhost:8080/nexus/content/repositories/eclipse_release_staging/plugins/org.eclipse.pde.ua.ui_1.0.300.v20130830-1837.jar";]]]]
-> [Help 1]

QUESTIONS:

We have these problems periodically and generally the solution has been
to try to route around the offending repository, but that is not always
possible.

How do I verify that the artifact is truly missing from the external p2
repository?

Are there programs run against these repositories that periodically scan
for missing artifacts and repair the metadata?

How do we file a "bug" against the offending provider (eclipse.org in
this case)?

Is there any way to get tycho to "forgive" certain errors in transitive
dependencies?

I'm very interested in how others debug and correct this type of problems.

I did find a nice tool that Igor Fedorenko wrote, that I found helpful
in validating p2 site url's, but it doesn't do any consistency checks on
the remote p2 repository.

thanks in advance,
-Russ

[1] https://github.com/ifedorenko/p2-browser.git

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