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https://issues.apache.org/jira/browse/LOG4J2-2266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16730086#comment-16730086
]
Songqq commented on LOG4J2-2266:
--------------------------------
[[email protected]] I initialize the log4j2 as code below. In
brief,I'am initialize the LoggerContextFactory in CustomClassloader by
Reflection. The code will cause NoClassDefFoundError on version 2.11.1.
{quote}{{private Object initCoreLoggerContext(ClassLoader customloader) throws
Exception {}}
{{ }}
{{ Class<?> logManagerClazz =
loader.loadClass("org.apache.logging.log4j.LogManager");}}
{{ Method getFactoryMethod = logManagerClazz.getDeclaredMethod("getFactory",
(Class<?>[]) null);}}
{{ Object factory = invokeRelectMethod(getFactoryMethod, null);}}
{{ }}}
{quote}
As I change the ContextClassLoader the Exception is gone .Everything is
going to be OK. I don't konw why .
{quote}{{private Object initCoreLoggerContext(ClassLoader customloader) throws
Exception {}}
{{ ClassLoader beforeLoader = Thread.currentThread().getContextClassLoader();}}
{{ Thread.currentThread().setContextClassLoader(customloader);}}
{{ Class<?> logManagerClazz =
loader.loadClass("org.apache.logging.log4j.LogManager");}}
{{ Method getFactoryMethod = logManagerClazz.getDeclaredMethod("getFactory",
(Class<?>[]) null);}}
{{ Object factory = invokeRelectMethod(getFactoryMethod, null);}}
{{ Thread.currentThread().setContextClassLoader(beforeLoader);}}
{{}}}
{quote}
> Log4j2 throws NoClassDefFoundError in Java 8
> --------------------------------------------
>
> Key: LOG4J2-2266
> URL: https://issues.apache.org/jira/browse/LOG4J2-2266
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.10.0
> Reporter: Andrejus Chaliapinas
> Priority: Major
>
> During Unit Tests run using JDK 8 and Log4j2 v2.10.0 - getting this as part
> of exception stack:
>
> java.lang.NoClassDefFoundError: Could not initialize class
> org.apache.logging.log4j.util.PropertiesUtil
> at
> org.apache.logging.log4j.status.StatusLogger.<clinit>(StatusLogger.java:71)
> at org.apache.logging.log4j.LogManager.<clinit>(LogManager.java:60)
>
> and issue seems to be somehow related to what is reported so far against JDK
> 9 here: LOG4J2-2129.
>
> If some patch on top of v2.10.0 is available to test - please let me know
> where to download it from.
>
> While running same UTs with same JDK 8 and v2.8.2 - issue is not observed.
>
> And question which I have here - why not introduce JDK8 compatibility runtime
> mode while things with JDK9 are not yet that stable? So it could continue use
> same logic as of v2.8.2 around that ServiceLoader and not cause side effects.
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