[jboss-jira] [JBoss JIRA] (JBAS-9537) AsyncAppender and URLWatchTimerTask deadlock

AsyncAppender and URLWatchTimerTask deadlock -------------------------------------------- Key: JBAS-9537 URL: https://issues.jboss.org/browse/JBAS-9537 Project: Application Server 3 4 5 and 6 Issue Type: Bug Components: Logging Affects Versions: JBossAS-4.2.1.GA Environment: CentOS release 5.9, JBoss 4.2.1, Oracle Java 1.7.0_21, VMWare virtual machine Reporter: Theodore Lizard Logging stops if AsyncAppender's buffer is full and logging is reconfigured. Example: I want to get detailed logs of something so I modify jboss-log4j.xml and change priority of some category to DEBUG. I tail the log file and it stops. Stackdump reveals the following: "Timer-0" daemon prio=10 tid=0x000000001c956000 nid=0x8b1 in Object.wait() [0x00002ae22e8c0000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) at java.lang.Thread.join(Unknown Source) - locked <0x0000000096a71230> (a java.lang.Thread) at java.lang.Thread.join(Unknown Source) at org.apache.log4j.AsyncAppender.close(AsyncAppender.java:240) at org.apache.log4j.helpers.AppenderAttachableImpl.removeAllAppenders(AppenderAttachableImpl.java:140) at org.apache.log4j.Category.removeAllAppenders(Category.java:868) - locked <0x00000000c850b4e0> (a org.apache.log4j.spi.RootLogger) at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:410) at org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:394) - locked <0x00000000c850b4e0> (a org.apache.log4j.spi.RootLogger) at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:829) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:712) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:618) at org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:743) at org.jboss.logging.Log4jService$URLWatchTimerTask.reconfigure(Log4jService.java:643) at org.jboss.logging.Log4jService$URLWatchTimerTask.run(Log4jService.java:582) at java.util.TimerThread.mainLoop(Unknown Source) at java.util.TimerThread.run(Unknown Source)