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https://issues.apache.org/jira/browse/SLING-9780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17205421#comment-17205421
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Hans-Peter Stoerr commented on SLING-9780:
------------------------------------------

Thank you for your prompt answer!
Very strange. This is only about system/console/logs - system/console/slinglog 
works perfectly, as does the launcher/log/error.log . I tried it again on a 
Linux machine with a Sling Starter built from the same commit as you, and still 
I get in system/console/log a message "Log Service is not installed/running." 
Compare the screenshot I'll attach. 


{code}
>  uname -a
  Linux (XXX) 3.10.0-1062.18.1.el7.x86_64 #1 SMP Tue Mar 17 23:49:17 UTC 2020 
x86_64 x86_64 x86_64 GNU/Linux

> java -version
openjdk version "11.0.6" 2020-01-14 LTS
OpenJDK Runtime Environment 18.9 (build 11.0.6+10-LTS)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.6+10-LTS, mixed mode, sharing)

> java -jar org.apache.sling.feature.launcher.jar -f feature-oak_tar.json -D 
> org.osgi.service.http.port=12345 >& stdout.log
{code}

If I have a look at the org.apache.sling.commons.logservice bundle in the OSGI 
Bundles listing, it's noticeable that there are no services exported from that 
bundle - see the screenshot attached; I'll also attach a screenshot from 
Starter version 11 with the 1.0.6 version, where you can see the LogService 
exported.

Would it help if I attach the stdout.log and launcher/logs/error.log?

> Sling Starter 12: OSGI Log Service does not work properly
> ---------------------------------------------------------
>
>                 Key: SLING-9780
>                 URL: https://issues.apache.org/jira/browse/SLING-9780
>             Project: Sling
>          Issue Type: Bug
>          Components: Starter
>    Affects Versions: Starter 12
>         Environment: Java 11 and 13 on MacOS
>            Reporter: Hans-Peter Stoerr
>            Priority: Minor
>
> In the current Sling Starter 12 snapshot the OSGI Log Service does not work 
> properly. This has the effect that in the console at OSGI / Log Service 
> [http://localhost:8080/system/console/logs] there is only the display "Log 
> Service is not installed/running." and messages from OSGI (such as errors in 
> activation methods) are inconveniently logged to stdout instead of the 
> configured logfiles like error.log, which gave me some headache until I 
> noticed that. :)  Both the console plugin and the logging to error.log do 
> work properly in version 11.
> This is in spite of the bundle org.apache.sling.commons.logservice being 
> active. I tried downgrading it from the currently included 1.1.0 to 1.0.6, 
> which works in the version 11 of the Sling Starter, but this doesn't help. So 
> I guess it's some kind of configuration problem.
> Thanks so much for your amazing work!



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