[logback-dev] [JIRA] Updates for LOGBACK-1578: Unable to use LevelChangePropagator in a modular application

[QOS.CH (JIRA)]

logback / LOGBACK-1578 [Open]
Unable to use LevelChangePropagator in a modular application

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https://jira.qos.ch/browse/LOGBACK-1578

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 Issue created
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Iiro Nykänen created this issue on 22/Sep/21 9:19 PM
Summary:              Unable to use LevelChangePropagator in a modular application
Issue Type:           Bug
Affects Versions:     1.3.0-alpha10
Assignee:             Logback dev list
Components:           logback-classic
Created:              22/Sep/21 9:19 PM
Environment:          JDK16
Priority:             Major
Reporter:             Iiro Nykänen
Description:
  Using LevelChangePropagator in Logback configuration causes the following exception in a modular application:
  {noformat}
  Exception in thread "main" java.lang.IllegalAccessError: class ch.qos.logback.classic.jul.LevelChangePropagator (in module ch.qos.logback.classic) cannot access class java.util.logging.LogManager (in module java.logging) because module ch.qos.logback.classic does not read module java.logging
  {noformat}
  
  I'm not sure how the multi-release system works exactly, but the java.logging module is not present currently in the [module-info|https://github.com/qos-ch/logback/blob/d7deb965489591bfa86ceb87897cd7d799f419ea/logback-classic/src/main/java9/module-info.java] file. As it only makes sense to require the module if the LevelChangePropagator is used (as far as I know, I don't believe the core of Logback Classic would require java.logging?), I'd imagine adding a *requires static java.logging* statement should be enough.
  
  There is an open [pull request|https://github.com/qos-ch/logback/pull/501] for this issue, but it features a plain requires statement which forces the requirement for all users whether they need it or not.


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