Yavor16 opened a new issue, #2640:
URL: https://github.com/apache/logging-log4j2/issues/2640
## Description
We are using file logging because we have many steps and after every step
the logs are persisted in the database and the files are deleted. While our
application was running on Java 11, we had no problems. When we switched to
Java 17, the problems started. I used the GC logs, jcmd and jmap to find out
that module/org.apache.logging.log4j.core.util.WatchManager is not garbage
collected. Instead of unloading the WatchManager class, the logs are full with:
Dynamic nestmate: unnamed
module/org.apache.logging.log4j.core.util.WatchManager$$Lambda$6426/0x00000007f2680228,
nest_host org.apache.logging.log4j.core.util.WatchManager, is hidden
LookupDefineClass:
org/apache/logging/log4j/core/util/WatchManager$$Lambda$6427 - with dynamic
nest-host org.apache.logging.log4j.core.util.WatchManager, hidden, strong,
without vm annotation
We tried switching the GC-s but nothing worked. We tried different log4j
versions. Now we use 2.23.1.
We've tried to stop/close everything.
`
FileUtils.deleteQuietly(log)
loggerContext.stop();
loggerContext.getConfiguration().getAppenders().values().forEach(appender -> {
loggerContext.getRootLogger().removeAppender(appender);
appender.stop();
});
loggerContext.getConfiguration().getWatchManager().getConfigurationWatchers().keySet().forEach(key
-> {
loggerContext.getConfiguration().getWatchManager().unwatch(key);
});
loggerContext.getConfiguration().getWatchManager().reset();
loggerContext.getConfiguration().getLoggers().values().forEach(AbstractLifeCycle::stop);
loggerContext.getConfiguration().getLoggers().values().forEach(loggerConfig -> {
loggerConfig.getAppenderRefs().clear();
});
loggerContext.getConfiguration().getWatchManager().stop();
loggerContext.getConfiguration().getWatchManager().getConfigurationWatchers().clear();
LogManager.shutdown();
`
We create new FileAppender, LoggerContext, LoggerConfig for every new log.
`
LoggerContext loggerContext = new LoggerContext(loggerName);
FileAppender fileAppender = FileAppender.newBuilder()
.setName(loggerName)
.withFileName(logFile.toString())
.setLayout(layoutCreatorFunction.apply(context))
.setConfiguration(context.getConfiguration())
.build();
fileAppender.start();
loggerContext.getConfiguration()
.addAppender(fileAppender);
LoggerConfig loggerConfig = loggerContext.getConfiguration()
.getLoggerConfig(loggerName);
Other config stuff
loggerContext.updateLoggers();
`
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