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https://issues.apache.org/jira/browse/LOG4J2-1457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15368535#comment-15368535
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Leon Finker commented on LOG4J2-1457:
-------------------------------------
To summarize, the only request out of this jira is to change the initialize
parameter to false to solve class loader deadlock problems with async logging
and concurrent logging from class' static initializer:
{noformat}
public final class Loader {
public static Class<?> initializeClass(final String className, final
ClassLoader loader)
throws ClassNotFoundException {
- return Class.forName(className, true, loader);
+ return Class.forName(className, false, loader);
}
public static Class<?> loadSystemClass(final String className) throws
ClassNotFoundException {
try {
- return Class.forName(className, true,
ClassLoader.getSystemClassLoader());
+ return Class.forName(className, false,
ClassLoader.getSystemClassLoader());
{noformat}
> Class loader deadlock when using async logging
> ----------------------------------------------
>
> Key: LOG4J2-1457
> URL: https://issues.apache.org/jira/browse/LOG4J2-1457
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.6.1
> Environment: On CentOS 6.7 and Java 1.8.0_60.
> Reporter: Leon Finker
> Priority: Critical
> Attachments: threaddump.txt
>
>
> We've encountered a class loading deadlock. Please review attached thread
> dump. Is it possible to have an option of pre-initializing the exception's
> thread stack on the caller's thread? It's hard to predict what libraries are
> doing in their classes' static initializers and may eventually end up logging
> and causing deadlock.
> In the attached thread dump here are the threads of interest:
> "Log4j2-AsyncLogger[AsyncContext@18b4aac2]1" #16 daemon prio=5 os_prio=0
> tid=0x00007ff870c7b000 nid=0x79f3 in Object.wait() [0x00007ff839142000]
> java.lang.Thread.State: RUNNABLE
> at java.lang.Class.forName0(Native Method)
> ...
> and
> "1A03340:Company:japan" #568 prio=5 os_prio=0 tid=0x00007ff871677000
> nid=0x725 runnable [0x00007ff74bd27000]
> ...<clinit>...
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