OSGi uses constraint violation

[wl880504]

I try to start my bundle created by Maven in FUSE ESB OSGi container. But I got error with its three dependencies:

1. libthrift-0.7.0.jar

2. httpclient-4.0.1.jar

3. httpcore-4.0.1.jar

Error executing command: Error starting bundles:

Unable to start bundle 262: Uses constraint violation. Unable to resolve bundle

revision file__opt_FuseESBEnterprise-7.1.0_deploy_libthrift-0.7.0.jar

because it is exposed to package 'org.apache.http' from bundle revisions

org.apache.httpcomponents.httpcore and org.apache.httpcomponents.httpclient    

via two dependency chains.

Chain 1:

file__opt_FuseESBEnterprise-7.1.0_deploy_libthrift-0.7.0.jar

import: (osgi.wiring.package=org.apache.http)

export: osgi.wiring.package=org.apache.http org.apache.httpcomponents.httpcore Chain 2: file__opt_FuseESBEnterprise-7.1.0_deploy_libthrift-0.7.0.jar import: (osgi.wiring.package=org.apache.http.client)

export: osgi.wiring.package=org.apache.http.client; uses:=org.apache.http

export: osgi.wiring.package=org.apache.http

org.apache.httpcomponents.httpclient

[ffang]

Hi,

Both httpclient-4.0.1.jar and httpcore-4.0.1.jar export package org.apache.http, this is split package issue in OSGi, which should be avoided.

You need use httpcore-osgi and httpclient-osgi bundle instead, something like

mvn:org.apache.httpcomponents/httpcore-osgi/4.1.4

mvn:org.apache.httpcomponents/httpclient-osgi/4.1.3

Freeman

[wl880504]

Hi Freeman,

Thanks for your help.

The version I used for Httpclient and Httpcore is 4.0.1. So shall I also use exactly the same version 4.0.1 for httpcore-osgi? Or it does not matter if use 4.0.1 or 4.1.3?

[ffang]

Hi,

Not sure if 4.0.1 OSGi bundle fixed this problem or not,  give it a shot anyway.

Freeman

[wl880504]

Thanks. I got another problem:

Error executing command: Error starting bundles:

     Unable to start bundle 359: Uses constraint violation. Unable to resolve bundle revision slf4j.api because it exports package 'org.slf4j.spi' and is also exposed to it from bundle revision org.ops4j.pax.logging.pax-logging-api via the following dependency chain:

  slf4j.api

    import: (&(osgi.wiring.package=org.slf4j.impl)(version>=1.6.0))

export: osgi.wiring.package=org.slf4j.impl; uses:=org.slf4j.spi   ch.qos.logback.classic     import: (&(osgi.wiring.package=org.slf4j.spi)(version>=1.6.0))

    export: osgi.wiring.package=org.slf4j.spi

  org.ops4j.pax.logging.pax-logging-api

Is this a similar problem like the httpcore? Is there a osgi bundle for slf4j.api? I have been looking around and find out a bundle named osgi-over-slf4j under org.slf4j group.