[
http://jira.qos.ch/browse/LBCLASSIC-154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=11311#action_11311
]
Ceki Gulcu commented on LBCLASSIC-154:
--------------------------------------
Thank you for this bug report. The deadlock you are reporting is unlike any
other I've seen before. Here is a summary I extracted from the stack trace you
provided.
"http-0.0.0.0-8080-14" daemon prio=10 tid=0x00002aab606c9400 nid=0x5668 waiting
for monitor entry [0x0000000046696000..0x0000000046699b90]
java.lang.Thread.State: BLOCKED (on object monitor)
at
ch.qos.logback.classic.turbo.ReconfigureOnChangeFilter.decide(ReconfigureOnChangeFilter.java:99)
- waiting to lock <0x00002aaabd743d58> (a
ch.qos.logback.classic.LoggerContext)
at
ch.qos.logback.classic.spi.TurboFilterList.getTurboFilterChainDecision(TurboFilterList.java:47)
at
ch.qos.logback.classic.LoggerContext.getTurboFilterChainDecision_0_3OrMore(LoggerContext.java:251)
at ch.qos.logback.classic.Logger.callTurboFilters(Logger.java:770)
at ch.qos.logback.classic.Logger.isTraceEnabled(Logger.java:642)
at org.slf4j.ext.XLogger.exit(XLogger.java:125)
at
com.diginsite.services.integration.dao.slave.client.DIISTransaction.processRequest(DIISTransaction.java:69)
at
com.diginsite.services.integration.dao.slave.client.DIISBrokerAccess.processRequest(DIISBrokerAccess.java:104)
at
com.diginsite.services.integration.dao.slave.client.DIISBrokerAccess.processRequest(DIISBrokerAccess.java:74)
at
com.diginsite.services.integration.dao.slave.BrokerAccessDaoConnection.process(BrokerAccessDaoConnection.java:204)
at
com.diginsite.services.integration.logging.IAALogHandler.publish(IAALogHandler.java:226)
at
com.diginsite.services.integration.logging.logback.IAALogAppender.append(IAALogAppender.java:131)
at
com.diginsite.services.integration.logging.logback.IAALogAppender.append(IAALogAppender.java:23)
at
ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:89)
at
ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:60)
at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:271)
at ch.qos.logback.classic.Logger.callAppenders(Logger.java:258)
at
ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:440)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:394)
at ch.qos.logback.classic.Logger.log(Logger.java:813)
at org.slf4j.ext.EventLogger.logEvent(EventLogger.java:36)
at
com.diginsite.services.logging.LoggerUtil.logEvent(LoggerUtil.java:29)
tens of similar threads waiting on object monitor <0x00002aaabd743d58> omitted
"http-0.0.0.0-8080-15" daemon prio=10 tid=0x00002aab600b0400 nid=0x5669 waiting
on condition [0x0000000046799000..0x000000004679ac10]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00002aaabd755128> (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:877)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1197)
at
java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:594)
at
ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:57)
at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:271)
at ch.qos.logback.classic.Logger.callAppenders(Logger.java:258)
at
ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:440)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:394)
at ch.qos.logback.classic.Logger.log(Logger.java:813)
at org.slf4j.ext.EventLogger.logEvent(EventLogger.java:36)
at
com.diginsite.services.logging.LoggerUtil.logEvent(LoggerUtil.java:29)
at
com.diginsite.product.common.services.security.jaas.LoginAdapter.authenticate(LoginAdapter.java:110)
at
com.diginsite.product.ofx.facade.security.OFXSecurityFacadeBean.authenticate(OFXSecurityFacadeBean.java:114)
at
com.diginsite.product.ofx.busdelegate.SecurityOFXBusinessDelegate.authenticate(SecurityOFXBusinessDelegate.java:78)
"http-0.0.0.0-8080-11" daemon prio=10 tid=0x00002aab60e5fc00 nid=0x5662 waiting
on condition [0x0000000046192000..0x0000000046194c90]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00002aaabd755128> (a
java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
at
java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:807)
at
ch.qos.logback.core.spi.AppenderAttachableImpl.detachAndStopAllAppenders(AppenderAttachableImpl.java:142)
at
ch.qos.logback.classic.Logger.detachAndStopAllAppenders(Logger.java:207)
at ch.qos.logback.classic.Logger.recursiveReset(Logger.java:335)
at ch.qos.logback.classic.Logger.recursiveReset(Logger.java:342)
at ch.qos.logback.classic.LoggerContext.reset(LoggerContext.java:212)
at
ch.qos.logback.classic.turbo.ReconfigureOnChangeFilter.reconfigure(ReconfigureOnChangeFilter.java:149)
at
ch.qos.logback.classic.turbo.ReconfigureOnChangeFilter.decide(ReconfigureOnChangeFilter.java:105)
- locked <0x00002aaabd743d58> (a ch.qos.logback.classic.LoggerContext)
at
ch.qos.logback.classic.spi.TurboFilterList.getTurboFilterChainDecision(TurboFilterList.java:47)
at
ch.qos.logback.classic.LoggerContext.getTurboFilterChainDecision_0_3OrMore(LoggerContext.java:251)
at ch.qos.logback.classic.Logger.callTurboFilters(Logger.java:770)
at ch.qos.logback.classic.Logger.isTraceEnabled(Logger.java:642)
at org.slf4j.ext.XLogger.exit(XLogger.java:125)
at
com.diginsite.product.common.entity.businessclient.BusinessClientImpl.getCredentialValidator(BusinessClientImpl.java:1046)
at
com.diginsite.product.common.services.security.jaas.LoginAdapter.authenticate(LoginAdapter.java:209)
at
com.diginsite.product.ofx.facade.security.OFXSecurityFacadeBean.authenticate(OFXSecurityFacadeBean.java:114)
at
com.diginsite.product.ofx.busdelegate.SecurityOFXBusinessDelegate.authenticate(SecurityOFXBusinessDelegate.java:78)
at
com.diginsite.product.ofx.presentation.BasePreProcessor.authenticate(BasePreProcessor.java:121)
at
com.diginsite.product.ofx.presentation.BankingPreProcessorHandler.execute(BankingPreProcessorHandler.java:108)
at com.eei.cmr.RequestProcessorMgr.do(Unknown Source)
at com.eei.cmr.RequestProcessorMgr.a(Unknown Source)
at com.eei.cmr.PFMMediator.a(Unknown Source)
at com.eei.cmr.CMRServlet.a(Unknown Source)
at com.eei.cmr.CMRServlet.doPost(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
It looks like there are tens of threads blocked on <0x00002aaabd743d58> (a
ch.qos.logback.classic.LoggerContext), and the holder of that lock, thread
"http-0.0.0.0-8080-11" which is parked waiting for <0x00002aaabd755128>, and
another thread namely
"http-0.0.0.0-8080-15" which holds a reader lock on <0x00002aaabd755128>, all
of which in theory should work fine without causing a deadlock.
> All threads become blocked in ReconfigureOnChangeFilter when changing log
> level under load
> ------------------------------------------------------------------------------------------
>
> Key: LBCLASSIC-154
> URL: http://jira.qos.ch/browse/LBCLASSIC-154
> Project: logback-classic
> Issue Type: Bug
> Affects Versions: 0.917
> Environment: Linux metro2a.star.dev.diginsite.com 2.6.18-128.1.1.el5
> #1 SMP Mon Jan 26 13:58:24 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
> Java(TM) SE Runtime Environment (build 1.6.0_11-b03)
> Java HotSpot(TM) 64-Bit Server VM (build 11.0-b16, mixed mode)
> Reporter: Andrew Perrine
> Assignee: Ceki Gulcu
> Attachments: stacktrace.log
>
>
> We were testing logback's new <configuration scan="true"> feature and when we
> changed the logging level while our application was under load, all threads
> became blocked inside logback (full stack trace is very long, here are two
> examples):
> "http-0.0.0.0-8080-148" daemon prio=10 tid=0x00002aab58679800 nid=0x26ed
> waiting for monitor entry [0x000000004e617000..0x000000004e618c10]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at
> ch.qos.logback.classic.turbo.ReconfigureOnChangeFilter.decide(ReconfigureOnChangeFilter.java:99)
> - waiting to lock <0x00002aaabd743d58> (a
> ch.qos.logback.classic.LoggerContext)
> at
> ch.qos.logback.classic.spi.TurboFilterList.getTurboFilterChainDecision(TurboFilterList.java:47)
> at
> ch.qos.logback.classic.LoggerContext.getTurboFilterChainDecision_0_3OrMore(LoggerContext.java:251)
> at ch.qos.logback.classic.Logger.callTurboFilters(Logger.java:770)
> at ch.qos.logback.classic.Logger.isDebugEnabled(Logger.java:488)
> at ch.qos.logback.classic.Logger.isDebugEnabled(Logger.java:484)
> at org.slf4j.ext.LoggerWrapper.debug(LoggerWrapper.java:238)
> at
> com.diginsite.product.ofx.presentation.CustomRequestWrapper.addCNtoOFXRequest(OFXFilter.java:191)
> at
> com.diginsite.product.ofx.presentation.CustomRequestWrapper.<init>(OFXFilter.java:153)
> at
> com.diginsite.product.ofx.presentation.OFXFilter.doFilter(OFXFilter.java:56)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.hyperic.hq.product.servlet.filter.JMXFilter.doFilter(JMXFilter.java:324)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
> at
> org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
> at
> org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
> at java.lang.Thread.run(Thread.java:619)
> "http-0.0.0.0-8080-15" daemon prio=10 tid=0x00002aab600b0400 nid=0x5669
> waiting on condition [0x0000000046799000..0x000000004679ac10]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00002aaabd755128> (a
> java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:877)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1197)
> at
> java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:594)
> at
> ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:57)
> at
> ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:271)
> at ch.qos.logback.classic.Logger.callAppenders(Logger.java:258)
> at
> ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:440)
> at
> ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:394)
> at ch.qos.logback.classic.Logger.log(Logger.java:813)
> at org.slf4j.ext.EventLogger.logEvent(EventLogger.java:36)
> at
> com.diginsite.services.logging.LoggerUtil.logEvent(LoggerUtil.java:29)
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