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Bug 364567

Summary:	Improve diagnostics when Fragment-Host fails to resolve
Product:	[RT] Virgo	Reporter:	Glyn Normington <glyn.normington>
Component:	runtime	Assignee:	Glyn Normington <glyn.normington>
Status:	CLOSED FIXED	QA Contact:
Severity:	enhancement
Priority:	P3	CC:	borobudur
Version:	unspecified
Target Milestone:	3.5.0.M01
Hardware:	PC
OS:	Mac OS X - Carbon (unsup.)
Whiteboard:

Description Glyn Normington

2011-11-23 05:53:16 EST

See bug 364003 for a suitable failure scenario and https://bugs.eclipse.org/bugs/show_bug.cgi?id=364003#c4 for the diagnostics produced. It was not obvious from the diagnostics that the Fragment-Host that could not be resolved contained a bundle version range for which there was no matching host.

Since this misled a user and I spent time in a debugger before I realised what was going on, the diagnostics should be improved.

Comment 1 Glyn Normington

2011-11-24 11:20:36 EST

Beefed up the diagnostics, e.g.:

<DE0500E> Unable to install application from URI 'file:/Users/glynnormington/bugs/364567/virgo-kernel-3.1.0.BUILD-20111123111605/pickup/com.springsource.org.apache.xerces-2.8.1.jar'. Cannot satisfy constraints for bundle 'com.springsource.org.apache.xerces' version '2.8.1'. Cannot resolve: com.springsource.org.apache.xerces
    Resolver report:
        A Fragment-Host could not be resolved. The affected fragment is com.springsource.org.apache.xerces_2.8.1. Resolver error data <Fragment-Host: com.springsource.org.apache.xmlcommons; bundle-version="[1.3.3,1.3.3]">. Caused by missing constraint in bundle <com.springsource.org.apache.xerces_2.8.1>
             constraint: <Fragment-Host: com.springsource.org.apache.xmlcommons; bundle-version="[1.3.3,1.3.3]">
. org.eclipse.virgo.kernel.osgi.framework.UnableToSatisfyBundleDependenciesException: Unable to satisfy dependencies of bundle 'com.springsource.org.apache.xerces' at version '2.8.1': Cannot resolve: com.springsource.org.apache.xerces
    Resolver report:
        A Fragment-Host could not be resolved. The affected fragment is com.springsource.org.apache.xerces_2.8.1. Resolver error data <Fragment-Host: com.springsource.org.apache.xmlcommons; bundle-version="[1.3.3,1.3.3]">. Caused by missing constraint in bundle <com.springsource.org.apache.xerces_2.8.1>
             constraint: <Fragment-Host: com.springsource.org.apache.xmlcommons; bundle-version="[1.3.3,1.3.3]">

The problematic Fragment-Host version range is now present in the diagnostics, which should make them easier to understand if a little more verbose.

Comment 2 Glyn Normington

2011-11-24 11:40:05 EST

Fixed in kernel commit 74e1f3d3c514ac7cbef0345d2864f1a619f2065e.