Constraints from the fragment conflict with the host

I am trying to extend the imports of bundle A from bundle B using Fragment-Host. In bundle B I have this line: Fragment-Host: and in bundle B's Import-Package I have added the imports required by bundle A

When I try to update bundle B with the manifest and start it I am getting the error: "Constraints from the fragment conflict with the host" with a list of all the imports exist in bundle B however when examining the Manifest of bundle A I don't see why these imports should conflict if they don't exist there

Also worth mentioning that I only run one version of both bundles in the OSGi container and that I already tried restarting the container after the update.

Bundle A Manifest:

Manifest-Version: 1.0
Archiver-Version: Plexus Archiver
Created-By: Apache Maven
Built-By: hudson
Build-Jdk: 1.6.0_20
Export-Package: <list of packages>
Tool: Bnd-0.0.311
Bundle-Name: Logging infrastructure
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Bundle-Version: 0.7.0
Bundle-ManifestVersion: 2
Bundle-Activator: <activator class>
Bundle-SymbolicName: com.mycomp.bundlea
Import-Package: com.sap.tc.logging,org.apache.commons.logging,org.apac
 he.log4j,org.apache.log4j.helpers,org.apache.log4j.spi,org.apache.log
 4j.xml,org.eclipse.osgi.framework.console;version="1.0",org.osgi.fram
 ework;version="1.5",org.osgi.service.cm;version="1.2",org.osgi.servic
 e.log;version="1.3",org.osgi.util.tracker;version="1.4"
Eclipse-RegisterBuddy: com.sap.org.apache.log4j

Bundle B Manifest:

    Manifest-Version: 1.0
Export-Package: org.perf4j;uses:="org.perf4j.chart,org.perf4j.helpers"
 ,org.perf4j.aop;uses:="javax.interceptor,org.apache.commons.jexl,org.
 aspectj.lang,org.aspectj.lang.annotation,org.perf4j",org.perf4j.chart
 ;uses:="org.perf4j,org.perf4j.helpers",org.perf4j.commonslog;uses:="o
 rg.apache.commons.logging,org.perf4j",org.perf4j.commonslog.aop;uses:
 ="org.aspectj.lang.annotation,org.perf4j,org.perf4j.aop,org.perf4j.co
 mmonslog",org.perf4j.helpers;uses:="javax.management,org.perf4j",org.
 perf4j.javalog;uses:="org.perf4j",org.perf4j.javalog.aop;uses:="org.a
 spectj.lang.annotation,org.perf4j,org.perf4j.aop,org.perf4j.javalog",
 org.perf4j.log4j;uses:="javax.management,org.apache.log4j,org.apache.
 log4j.helpers,org.apache.log4j.spi,org.perf4j,org.perf4j.chart,org.pe
 rf4j.helpers",org.perf4j.log4j.aop;uses:="org.aspectj.lang.annotation
 ,org.perf4j,org.perf4j.aop,org.perf4j.log4j",org.perf4j.log4j.servlet
 ;uses:="org.perf4j.chart,org.perf4j.servlet",org.perf4j.servlet;uses:
 ="javax.servlet,javax.servlet.http,org.perf4j.chart",org.perf4j.slf4j
 ;uses:="org.perf4j,org.slf4j",org.perf4j.slf4j.aop;uses:="org.aspectj
 .lang.annotation,org.perf4j,org.perf4j.aop,org.perf4j.slf4j"
Implementation-Title: Perf4J
Implementation-Version: 0.9.13
Built-By: devinea
Specification-Vendor: perf4j.org
Tool: Bundlor 1.0.0.RELEASE
Created-By: Apache 开发者_开发知识库Maven
Implementation-Vendor: perf4j.org
Implementation-Vendor-Id: org.perf4j
Build-Jdk: 1.5.0_22
Specification-Title: Perf4J
Import-Package: javax.interceptor,javax.management,javax.servlet,javax
 .servlet.http,org.apache.commons.jexl,org.apache.commons.jexl.context
 ,org.apache.commons.logging,org.apache.log4j,org.apache.log4j.helpers
 ,org.apache.log4j.spi,org.aspectj.lang,org.aspectj.lang.annotation,or
 g.slf4j,org.perf4j.log4j
Specification-Version: 0.9.13
Main-Class: org.perf4j.LogParser
Archiver-Version: Plexus Archiver
Bundle-SymbolicName: org.codehaus.perf4j
Bundle-Version: 0.9.13
Fragment-Host: com.mycomp.bundlea

Any ideas...?

---

Constraint conflicts are difficult to diagnose remotely, especially since Equinox gives very little information in its error messages... Felix is better at this but it looks like you are tied to Equinox with some Eclipse-specific extension headers.

For some general pointers and an explanation of the problem, see the following two blog posts that I wrote some time ago:

http://njbartlett.name/2011/09/02/uses-constraints.html

http://njbartlett.name/2011/03/31/uses-constraints-in-felix.html