[slf4j-user] (2nd try with correction) Manifest of log4j-over-slf4j 1.7.35: Invalid under OSGi

[Ceki Gülcü]

Hi Daniel,

Thank you for your detailed report. I happy to inform you that the issue
was previously described in SLF4J-541 [1] and is already fixed in SLF4J
version 1.7.36.

Best regards,

[1] https://jira.qos.ch/browse/SLF4J-541

-- 
Ceki Gülcü

Sponsoring SLF4J/logback/reload4j at https://github.com/sponsors/qos-ch

On 2/8/2022 5:02 PM, Daniel Krügler wrote:
> Hi again,
> 
> [In a previous posting I attempted to report an issue with an slf4
> artifact, but due to a (even repeated) typo, the previous reporting was
> confusing and misleading. My apologize for that. This is the corrected
> version for the report:]
> 
> During our attempt to upgrade to the most recent 1.7.35 slf4j bundles we
> noticed the following problem. The artifact
> 
>    <groupId>org.slf4j</groupId>
>     <artifactId>log4j-over-slf4j</artifactId>
>     <version>1.7.35</version>
> 
> available from here:
> 
> https://repo1.maven.org/maven2/org/slf4j/log4j-over-slf4j/1.7.35/log4j-over-slf4j-1.7.35.jar
> 
> 
> contains a Manifest.MF, whose Export-Package entry is invalid under
> OSGi, because its exported versions are non-numeric and seem to be
> left-overs of an incomplete property resolution process:
> 
> Export-Package: org.apache.log4j;version=${log4j.version},org.apache.l
>  og4j.helpers;version=${log4j.version},org.apache.log4j.spi;version=${
>  log4j.version},org.apache.log4j.xml;version=${log4j.version}
> 
> Please note the multiple occurrences of ${log4j.version} above. In our
> OSGi container (An Eclipse RCP client), this bundle is not accepted. For
> example our Eclipse PDE build reports:
> 
> java.lang.IllegalArgumentException: invalid version "${log4j.version}":
> non-numeric "${log4j"
> 
> Of all bundles that originate from the org.slf4j groupId and that we are
> using, we only found this problem in the log4j-over-slf4j artifact
> (Bundle-SymbolicName: log4j.over.slf4j).
> 
> This problem currently prevents us from using the most recent 1.7
> release branch of slf4j.
> 
> Thanks,
> 
> - Daniel
>