java - Tomcat webapp error - application started thread [AWT-Windows] but has failed to stop it - memory leak? -

i didn't notice until today during testing locally on pc, tomcat had posted error in log file. i'm using tomcat 6.0.29 , java jdk 1.6.

dec 1, 2010 12:36:57 pm org.apache.catalina.core.standardcontext reload info: reloading context has started dec 1, 2010 12:36:57 pm org.apache.catalina.loader.webappclassloader clearreferencesthreads sever: web application [/autospyder] appears have started thread named [awt-windows] has failed stop it. create memory leak.

what? i've never seen before. checked log file yesterday, , sure enough, error there too. don't quite understand what's causing this.

can assume have 1 of servlets uses objects java.awt package? if so, how pinpoint code causing this?

edited add thread dump

 2010-12-01 14:28:18 full thread dump java hotspot(tm) client vm (17.1-b03 mixed mode, sharing):  "jmx server connection timeout 34" daemon prio=6 tid=0x03069400 nid=0x960 in object.wait() [0x0461f000]    java.lang.thread.state: timed_waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a [i)     @ com.sun.jmx.remote.internal.servercommunicatoradmin$timeout.run(servercommunicatoradmin.java:150)     - locked  (a [i)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "rmi scheduler(0)" daemon prio=6 tid=0x03069000 nid=0xe88 waiting on condition [0x045cf000]    java.lang.thread.state: timed_waiting (parking)     @ sun.misc.unsafe.park(native method)     - parking wait   (a java.util.concurrent.locks.abstractqueuedsynchronizer$conditionobject)     @ java.util.concurrent.locks.locksupport.parknanos(locksupport.java:198)     @ java.util.concurrent.locks.abstractqueuedsynchronizer$conditionobject.awaitnanos(abstractqueuedsynchronizer.java:2025)     @ java.util.concurrent.delayqueue.take(delayqueue.java:164)     @ java.util.concurrent.scheduledthreadpoolexecutor$delayedworkqueue.take(scheduledthreadpoolexecutor.java:609)     @ java.util.concurrent.scheduledthreadpoolexecutor$delayedworkqueue.take(scheduledthreadpoolexecutor.java:602)     @ java.util.concurrent.threadpoolexecutor.gettask(threadpoolexecutor.java:947)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:907)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "rmi tcp connection(1)-192.168.0.102" daemon prio=6 tid=0x0308a400 nid=0xebc runnable [0x0457f000]    java.lang.thread.state: runnable     @ java.net.socketinputstream.socketread0(native method)     @ java.net.socketinputstream.read(socketinputstream.java:129)     @ java.io.bufferedinputstream.fill(bufferedinputstream.java:218)     @ java.io.bufferedinputstream.read(bufferedinputstream.java:237)     - locked  (a java.io.bufferedinputstream)     @ java.io.filterinputstream.read(filterinputstream.java:66)     @ sun.rmi.transport.tcp.tcptransport.handlemessages(tcptransport.java:517)     @ sun.rmi.transport.tcp.tcptransport$connectionhandler.run0(tcptransport.java:790)     @ sun.rmi.transport.tcp.tcptransport$connectionhandler.run(tcptransport.java:649)     @ java.util.concurrent.threadpoolexecutor$worker.runtask(threadpoolexecutor.java:886)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:908)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     -  (a java.util.concurrent.locks.reentrantlock$nonfairsync)  "rmi tcp accept-0" daemon prio=6 tid=0x039e0c00 nid=0xc68 runnable [0x0452f000]    java.lang.thread.state: runnable     @ java.net.plainsocketimpl.socketaccept(native method)     @ java.net.plainsocketimpl.accept(plainsocketimpl.java:390)     - locked  (a java.net.sockssocketimpl)     @ java.net.serversocket.implaccept(serversocket.java:453)     @ java.net.serversocket.accept(serversocket.java:421)     @ sun.management.jmxremote.localrmiserversocketfactory$1.accept(localrmiserversocketfactory.java:34)     @ sun.rmi.transport.tcp.tcptransport$acceptloop.executeacceptloop(tcptransport.java:369)     @ sun.rmi.transport.tcp.tcptransport$acceptloop.run(tcptransport.java:341)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "awt-windows" daemon prio=6 tid=0x02b65400 nid=0x7c4 runnable [0x042cf000]    java.lang.thread.state: runnable     @ sun.awt.windows.wtoolkit.eventloop(native method)     @ sun.awt.windows.wtoolkit.run(wtoolkit.java:293)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "java2d disposer" daemon prio=10 tid=0x02fccc00 nid=0x93c in object.wait() [0x039df000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a java.lang.ref.referencequeue$lock)     @ java.lang.ref.referencequeue.remove(referencequeue.java:118)     - locked  (a java.lang.ref.referencequeue$lock)     @ java.lang.ref.referencequeue.remove(referencequeue.java:134)     @ sun.java2d.disposer.run(disposer.java:127)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "http-8080-6" daemon prio=6 tid=0x03322800 nid=0xfec in object.wait() [0x0395f000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.net.jioendpoint$worker.await(jioendpoint.java:458)     - locked  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ org.apache.tomcat.util.net.jioendpoint$worker.run(jioendpoint.java:484)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "http-8080-5" daemon prio=6 tid=0x02ba5c00 nid=0xdbc in object.wait() [0x0390f000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.net.jioendpoint$worker.await(jioendpoint.java:458)     - locked  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ org.apache.tomcat.util.net.jioendpoint$worker.run(jioendpoint.java:484)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "http-8080-4" daemon prio=6 tid=0x02ff6400 nid=0xa1c in object.wait() [0x038bf000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.net.jioendpoint$worker.await(jioendpoint.java:458)     - locked  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ org.apache.tomcat.util.net.jioendpoint$worker.run(jioendpoint.java:484)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "http-8080-3" daemon prio=6 tid=0x0317e400 nid=0x850 in object.wait() [0x0386f000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.net.jioendpoint$worker.await(jioendpoint.java:458)     - locked  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ org.apache.tomcat.util.net.jioendpoint$worker.run(jioendpoint.java:484)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "http-8080-2" daemon prio=6 tid=0x03314800 nid=0xf9c in object.wait() [0x0381f000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.net.jioendpoint$worker.await(jioendpoint.java:458)     - locked  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ org.apache.tomcat.util.net.jioendpoint$worker.run(jioendpoint.java:484)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "http-8080-1" daemon prio=6 tid=0x02efe800 nid=0x250 in object.wait() [0x037cf000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.net.jioendpoint$worker.await(jioendpoint.java:458)     - locked  (a org.apache.tomcat.util.net.jioendpoint$worker)     @ org.apache.tomcat.util.net.jioendpoint$worker.run(jioendpoint.java:484)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "tp-monitor" daemon prio=6 tid=0x02eed800 nid=0xd64 in object.wait() [0x0375f000]    java.lang.thread.state: timed_waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.threads.threadpool$monitorrunnable)     @ org.apache.tomcat.util.threads.threadpool$monitorrunnable.run(threadpool.java:565)     - locked  (a org.apache.tomcat.util.threads.threadpool$monitorrunnable)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "tp-processor4" daemon prio=6 tid=0x0318b000 nid=0x998 runnable [0x0370f000]    java.lang.thread.state: runnable     @ java.net.plainsocketimpl.socketaccept(native method)     @ java.net.plainsocketimpl.accept(plainsocketimpl.java:390)     - locked  (a java.net.sockssocketimpl)     @ java.net.serversocket.implaccept(serversocket.java:453)     @ java.net.serversocket.accept(serversocket.java:421)     @ org.apache.jk.common.channelsocket.accept(channelsocket.java:312)     @ org.apache.jk.common.channelsocket.acceptconnections(channelsocket.java:666)     @ org.apache.jk.common.channelsocket$socketacceptor.runit(channelsocket.java:877)     @ org.apache.tomcat.util.threads.threadpool$controlrunnable.run(threadpool.java:690)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "tp-processor3" daemon prio=6 tid=0x0308f800 nid=0x92c in object.wait() [0x036bf000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.threads.threadpool$controlrunnable)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.threads.threadpool$controlrunnable.run(threadpool.java:662)     - locked  (a org.apache.tomcat.util.threads.threadpool$controlrunnable)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "tp-processor2" daemon prio=6 tid=0x03192400 nid=0xfac in object.wait() [0x0366f000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.threads.threadpool$controlrunnable)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.threads.threadpool$controlrunnable.run(threadpool.java:662)     - locked  (a org.apache.tomcat.util.threads.threadpool$controlrunnable)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "tp-processor1" daemon prio=6 tid=0x03182400 nid=0x8d8 in object.wait() [0x0361f000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a org.apache.tomcat.util.threads.threadpool$controlrunnable)     @ java.lang.object.wait(object.java:485)     @ org.apache.tomcat.util.threads.threadpool$controlrunnable.run(threadpool.java:662)     - locked  (a org.apache.tomcat.util.threads.threadpool$controlrunnable)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "http-8080-acceptor-0" daemon prio=6 tid=0x03172400 nid=0xf04 runnable [0x035cf000]    java.lang.thread.state: runnable     @ java.net.plainsocketimpl.socketaccept(native method)     @ java.net.plainsocketimpl.accept(plainsocketimpl.java:390)     - locked  (a java.net.sockssocketimpl)     @ java.net.serversocket.implaccept(serversocket.java:453)     @ java.net.serversocket.accept(serversocket.java:421)     @ org.apache.tomcat.util.net.defaultserversocketfactory.acceptsocket(defaultserversocketfactory.java:61)     @ org.apache.tomcat.util.net.jioendpoint$acceptor.run(jioendpoint.java:352)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "containerbackgroundprocessor[standardengine[catalina]]" daemon prio=6 tid=0x03163400 nid=0xbe8 waiting on condition [0x0357f000]    java.lang.thread.state: timed_waiting (sleeping)     @ java.lang.thread.sleep(native method)     @ org.apache.catalina.core.containerbase$containerbackgroundprocessor.run(containerbase.java:1579)     @ java.lang.thread.run(thread.java:662)     locked ownable synchronizers:     - none  "gc daemon" daemon prio=2 tid=0x0307bc00 nid=0x110 in object.wait() [0x0349f000]    java.lang.thread.state: timed_waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a sun.misc.gc$latencylock)     @ sun.misc.gc$daemon.run(gc.java:100)     - locked  (a sun.misc.gc$latencylock)     locked ownable synchronizers:     - none  "low memory detector" daemon prio=6 tid=0x02aecc00 nid=0x5b4 runnable [0x00000000]    java.lang.thread.state: runnable     locked ownable synchronizers:     - none  "compilerthread0" daemon prio=10 tid=0x02ae7000 nid=0x798 waiting on condition [0x00000000]    java.lang.thread.state: runnable     locked ownable synchronizers:     - none  "attach listener" daemon prio=10 tid=0x02ae5800 nid=0xddc waiting on condition [0x00000000]    java.lang.thread.state: runnable     locked ownable synchronizers:     - none  "signal dispatcher" daemon prio=10 tid=0x02ae4000 nid=0xc00 runnable [0x00000000]    java.lang.thread.state: runnable     locked ownable synchronizers:     - none  "finalizer" daemon prio=8 tid=0x02add400 nid=0x378 in object.wait() [0x02caf000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a java.lang.ref.referencequeue$lock)     @ java.lang.ref.referencequeue.remove(referencequeue.java:118)     - locked  (a java.lang.ref.referencequeue$lock)     @ java.lang.ref.referencequeue.remove(referencequeue.java:134)     @ java.lang.ref.finalizer$finalizerthread.run(finalizer.java:159)     locked ownable synchronizers:     - none  "reference handler" daemon prio=10 tid=0x02adbc00 nid=0x474 in object.wait() [0x02c5f000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on  (a java.lang.ref.reference$lock)     @ java.lang.object.wait(object.java:485)     @ java.lang.ref.reference$referencehandler.run(reference.java:116)     - locked  (a java.lang.ref.reference$lock)     locked ownable synchronizers:     - none  "main" prio=6 tid=0x002b7000 nid=0x14c runnable [0x0090f000]    java.lang.thread.state: runnable     @ java.net.plainsocketimpl.socketaccept(native method)     @ java.net.plainsocketimpl.accept(plainsocketimpl.java:390)     - locked  (a java.net.sockssocketimpl)     @ java.net.serversocket.implaccept(serversocket.java:453)     @ java.net.serversocket.accept(serversocket.java:421)     @ org.apache.catalina.core.standardserver.await(standardserver.java:389)     @ org.apache.catalina.startup.catalina.await(catalina.java:662)     @ org.apache.catalina.startup.catalina.start(catalina.java:614)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:39)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:25)     @ java.lang.reflect.method.invoke(method.java:597)     @ org.apache.catalina.startup.bootstrap.start(bootstrap.java:289)     @ org.apache.catalina.startup.bootstrap.main(bootstrap.java:414)     locked ownable synchronizers:     - none  "vm thread" prio=10 tid=0x02ada400 nid=0x210 runnable   "vm periodic task thread" prio=10 tid=0x02aefc00 nid=0x79c waiting on condition   jni global references: 1529 

try taking thread dump list of threads running on server. this, may able pinpoint class started thread based on stack traces

windows

on console window press ctrl + break

unix

in command line enter: kill -3 <pid>