Andre Bogus created LOG4J2-336:
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Summary: AsyncLogger.log fail with NullPointerException after
double reconfigure
Key: LOG4J2-336
URL: https://issues.apache.org/jira/browse/LOG4J2-336
Project: Log4j 2
Issue Type: Bug
Components: Core
Affects Versions: 2.0-beta8
Environment: LUbuntu 13.04, OpenJDK 7
Reporter: Andre Bogus
Using reconfigure() to select log files at runtime.
After the second reconfigure, the next log fails with a NullPointerException in
org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper:253
It appears that the disruptor has been nulled and not been brought back up by
the second reconfigure().
Trying to get a minimal test case I came up with the following log4j2.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<configuration status="debug">
<appenders>
<Console name="console" target="SYSTEM_OUT">
<PatternLayout pattern="%d\{ABSOLUTE\} %6p %c %x - %m%n"/>
</Console>
</appenders>
<loggers>
<asyncroot level="WARN">
<appender-ref ref="console" />
</asyncroot>
</loggers>
</configuration>
The following Java class did NOT bring up the error, instead it threw a
different exception (stack trace below):
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.LoggerContext;
public class Log4jAsyncReconfTest {
private static final Logger log =
LogManager.getLogger(Log4jAsyncReconfTest.class);
public static void main(String[] args) throws InterruptedException
\{
System.out.println("test");
LoggerContext ctx = (LoggerContext)
LogManager.getContext(false);
ctx.reconfigure();
ctx.reconfigure();
log.warn("Danger!");
\}
}
----
throws:
java.util.concurrent.RejectedExecutionException: Task
com.lmax.disruptor.BatchEventProcessor@7ea4461e rejected from
java.util.concurrent.ThreadPoolExecutor@52f79c86[Terminated, pool size = 0,
active threads = 0, queued tasks = 0, completed tasks = 1]
at
java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2048)
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:821)
at
java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1372)
at
java.util.concurrent.Executors$DelegatedExecutorService.execute(Executors.java:628)
at
com.lmax.disruptor.dsl.EventProcessorInfo.start(EventProcessorInfo.java:77)
at com.lmax.disruptor.dsl.Disruptor.start(Disruptor.java:263)
at
org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper.initDisruptor(AsyncLoggerConfigHelper.java:119)
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