[jira] [Created] (LOG4J2-2129) Log4j2 throws NoClassDefFoundError in Java 9

["Blazej (JIRA)" <ji...@apache.org>]

Blazej created LOG4J2-2129:
------------------------------

             Summary: Log4j2 throws NoClassDefFoundError in Java 9
                 Key: LOG4J2-2129
                 URL: https://issues.apache.org/jira/browse/LOG4J2-2129
             Project: Log4j 2
          Issue Type: Bug
          Components: API
    Affects Versions: 2.10.0, 2.10.1
         Environment: Java 9
            Reporter: Blazej


When I execute a sample project (https://github.com/bbucko/log4j2-jpms-sample) in Java 9 a following exception is thrown:
{code}
Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.apache.logging.log4j.util.PropertiesUtil
	at org.apache.logging.log4j/org.apache.logging.log4j.status.StatusLogger.<clinit>(StatusLogger.java:71)
	at org.apache.logging.log4j/org.apache.logging.log4j.LogManager.<clinit>(LogManager.java:60)
{code}


Exception is a little bit misleading because it seems that true root cause can be found here:
{code}
java.util.ServiceConfigurationError: org.apache.logging.log4j.util.PropertySource: module org.apache.logging.log4j does not declare `uses`
	at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:588)
	at java.base/java.util.ServiceLoader.checkCaller(ServiceLoader.java:574)
	at java.base/java.util.ServiceLoader.<init>(ServiceLoader.java:503)
	at java.base/java.util.ServiceLoader.load(ServiceLoader.java:1684)
	at org.apache.logging.log4j/org.apache.logging.log4j.util.PropertiesUtil$Environment.<init>(PropertiesUtil.java:319)
	at org.apache.logging.log4j/org.apache.logging.log4j.util.PropertiesUtil$Environment.<init>(PropertiesUtil.java:310)
	at org.apache.logging.log4j/org.apache.logging.log4j.util.PropertiesUtil.<init>(PropertiesUtil.java:69)
	at org.apache.logging.log4j/org.apache.logging.log4j.util.PropertiesUtil.<clinit>(PropertiesUtil.java:49)
	at org.apache.logging.log4j/org.apache.logging.log4j.util.Constants.<clinit>(Constants.java:30)
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:375)
	at org.apache.logging.log4j/org.apache.logging.log4j.spi.AbstractLogger.createClassForProperty(AbstractLogger.java:198)
	at org.apache.logging.log4j/org.apache.logging.log4j.spi.AbstractLogger.<clinit>(AbstractLogger.java:88)
	at org.apache.logging.log4j/org.apache.logging.log4j.LogManager.<clinit>(LogManager.java:60)
{code}



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