karaf service bundle conflict with 3rd library bundle - split package issue

[wl880504]

In my project. I want to use packages from org.slf4j/slf4j.api/1.64. But the service bundle org.ops4j.pax.logging/pax-logging-api provide the same package as slf4j.api. Both provide packages like:

org.slf4j              org.slf4j.helpers             org.slf4j.spi

This results in split package issue in my project:

Unable to start bundle 386: Uses constraint violation. Unable to resolve bundle revision slf4j.api [386.0 because it exports package 'org.slf4j.spi' and is also exposed to it from bundle revision org.ops4j.pax.logging.pax-logging-api [4.0 via the following dependency chain:

  slf4j.api [386.0

    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 [385.0     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 [4.0

In this case. Both ch.qos.logback.classic and org.ops4j.pax.logging.pax-logging-api export package org.slf4j.spi which leads the split package issue.

I am wondering if I can stop the service bundel pax-logging-api. I want to know what will happen if a pre-installed service bundle is stopped.

Or can i find a osgi version bunlde for ch.qos.logback.classic and org.slf4j.spi? In the previous case, Freeman just tells me that I can use a osgi version bunlde httpclient-osgi to replace httpclient.

[ffang]

Hi,

No, you can't remove org.ops4j.pax.logging.pax-logging-api bundle, it's very fundamental bundle of OSGi container and provide OSGi Logging Service, take a look at

to get more details.

And you shouldn't install ch.qos.logback.classic bundle yourself, all logging staff should be from pax-logging-api and pax-logging-service bundle already

http://team.ops4j.org/wiki/display/paxlogging/Pax+Logging

Freeman

[wl880504]

Hi Freeman,

Now I want to use pax-logging-api bundle instead of ch.qos.logback.classic. So I remove ch.qos.logback.classic. But still I got an error:

Unable to start bundle 388: Unresolved constraint in bundle slf4j.api [388 : Unable to resolve 388.0: missing requirement [388.0  osgi.wiring.package; (&(osgi.wiring.package=org.slf4j.impl)(version>=1.6.0))

pax-logging-api exports org.slf4j.impl package. So why I got this error?

[ffang]

Hi,

You need remove slf4j.api bundle as well, as I mentioned, all logging staff should be from pax-logging-api and pax-logging-service bundle already, so you shouldn't install any logging bundle like slf4j and log4j.

Please take a look at

[1]http://team.ops4j.org/wiki/display/paxlogging/Pax+Logging

Freeman