[logback-dev] [JIRA] Created: (LBCLASSIC-277) BLOCKED state on AppenderBase.java:64

[h mahboobi (JIRA)]

BLOCKED state on AppenderBase.java:64
-------------------------------------

                 Key: LBCLASSIC-277
                 URL: http://jira.qos.ch/browse/LBCLASSIC-277
             Project: logback-classic
          Issue Type: Bug
          Components: appender
    Affects Versions: 0.9.22
         Environment: 64 bit Hardware with 16 processors, 32 GB RAM
SUSE Enterprise Linux 10
Glassfish 2.1.1
JDK 1.6 U15
            Reporter: h mahboobi
            Assignee: Logback dev list


We're using Logback in high transactional system.
In some cases, our JVM memory abnormally increased and after some minutes, clients could not connect to our services.

Here is dump of JVM threads.
I think there is a problem on logback.

"pool-9-thread-1257" prio=10 tid=0x00002ab04d8c4000 nid=0x6613 waiting for monitor entry [0x000000004ec13000]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at ch.qos.logback.core.AppenderBase.doAppend(AppenderBase.java:64)
        - waiting to lock <0x00002aab31180628> (a ch.qos.logback.classic.sift.SiftingAppender)
        at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:64)
        at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:283)
        at ch.qos.logback.classic.Logger.callAppenders(Logger.java:270)
        at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:471)
        at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:425)
        at ch.qos.logback.classic.Logger.debug(Logger.java:532)
        at com.kishware.common.log.Slf4jLogger.debug(Slf4jLogger.java:47)
        at com.kishware.core.framework.controller.PreOperationController.preOperationControl(PreOperationController.java:109)
        at com.kishware.core.framework.controller.PreOperationController$1.call(PreOperationController.java:73)
        at com.kishware.core.framework.controller.PreOperationController$1.call(PreOperationController.java:1)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)

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