Name: rl43681 Date: 02/13/2003


FULL PRODUCT VERSION :
java -version
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)

FULL OPERATING SYSTEM VERSION :
Linux vanob_rh 2.4.18-24.8.0 #1 Fri Jan 31 07:28:55 EST 2003
i686 athlon i386 GNU/Linux
glibc-2.2.93-5
ADDITIONAL OPERATING SYSTEMS :
Redhat 80

EXTRA RELEVANT SYSTEM CONFIGURATION :
AMD Athlon XP 1800+
512MB RAM
GeForce2 MX400 32MB


A DESCRIPTION OF THE PROBLEM :
I was working in the NetBeans IDE 3.4.1
I switched to another window and some times later back to
the ide that had been hung. I filled a bug
http://www.netbeans.org/issues/show_bug.cgi?id=30941
to NetBeans bugzilla and they told me that was a jdk bug.

Providing full thread dump

EXPECTED VERSUS ACTUAL BEHAVIOR :
When IDE is hung you may loose lot of work, because the only
method is to kill the process.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Full Thread dump:

Full thread dump Java HotSpot(TM) Client VM
(1.4.1_01-b01 mixed mode):

"Inactive RequestProcessor thread" daemon prio=1
tid=0x0x84fa000 nid=0x3367 in O
bject.wait() [53101000..53101830]
        at java.lang.Object.wait(Native Method)
        at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java
:574)
        - locked <0x446d00c0> (a java.lang.Object)

"Inactive RequestProcessor thread" daemon prio=1
tid=0x0x84fa350 nid=0x3226 in O
bject.wait() [52e91000..52e91830]
        at java.lang.Object.wait(Native Method)
        at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java
:574)
        - locked <0x46b0a338> (a java.lang.Object)

"Compilation" daemon prio=1 tid=0x0x877f2e0
nid=0x3199 in Object.wait() [53dea00
0..53dea830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x45fa9498> (a
java.util.LinkedList)
        at java.lang.Object.wait(Object.java:426)
        at
org.netbeans.core.compiler.CompilationEngineImpl$CompilerThread.nextJ
obAndTask(CompilationEngineImpl.java:172)
        - locked <0x45fa9498> (a java.util.LinkedList)
        at
org.netbeans.core.compiler.CompilationEngineImpl$CompilerThread.run(C
ompilationEngineImpl.java:185)

"Debugger Request Processor" daemon prio=1
tid=0x0x83bad40 nid=0x3183 in Object.
wait() [53cbc000..53cbc830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x45e37aa0> (a
java.util.TreeSet)
        at
org.netbeans.modules.debugger.support.util.RequestProcessor$Processor
Thread.run(RequestProcessor.java:526)
        - locked <0x45e37aa0> (a java.util.TreeSet)

"Debugger operator thread" prio=1 tid=0x0x52f0ede8
nid=0x3182 in Object.wait() [
53fee000..53fee830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x45d60728> (a
com.sun.tools.jdi.EventQueueImpl)
        at java.lang.Object.wait(Object.java:426)
        at
com.sun.tools.jdi.EventQueueImpl.removeUnfiltered(EventQueueImpl.java
:162)
        - locked <0x45d60728> (a
com.sun.tools.jdi.EventQueueImpl)
        at
com.sun.tools.jdi.EventQueueImpl.remove(EventQueueImpl.java:78)
        at
com.sun.tools.jdi.EventQueueImpl.remove(EventQueueImpl.java:64)
        at
org.netbeans.modules.debugger.jpda.util.Operator$1.run(Operator.java:
73)
        at java.lang.Thread.run(Thread.java:536)

"JDI Target VM Interface" daemon prio=1
tid=0x0x52f0e150 nid=0x3181 runnable [53
f6d000..53f6d830]
        at
java.net.SocketInputStream.socketRead0(Native Method)
        at
java.net.SocketInputStream.read(SocketInputStream.java:129)
        at
java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
        at
java.io.BufferedInputStream.read(BufferedInputStream.java:201)
        - locked <0x45d1ec48> (a
java.io.BufferedInputStream)
        at
com.sun.tools.jdi.SocketConnection.receivePacket(SocketConnection.jav
a:58)
        - locked <0x45d1ec68> (a java.lang.Object)
        at
com.sun.tools.jdi.TargetVM.run(TargetVM.java:96)
        at java.lang.Thread.run(Thread.java:536)

"JDI Internal Event Handler" daemon prio=1
tid=0x0x52f0ddd0 nid=0x3.wait() [53eec000..53eec830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x45d607a0> (a
com.sun.tools.jdi.EventQueueImpl)
        at java.lang.Object.wait(Object.java:426)
        at
com.sun.tools.jdi.EventQueueImpl.removeUnfiltered(EventQueueImpl.java
:162)
        - locked <0x45d607a0> (a
com.sun.tools.jdi.EventQueueImpl)
        at
com.sun.tools.jdi.EventQueueImpl.removeInternal(EventQueueImpl.java:9
7)
        at
com.sun.tools.jdi.InternalEventHandler.run(InternalEventHandler.java:
36)
        at java.lang.Thread.run(Thread.java:536)

"Compilation" daemon prio=1 tid=0x0x80cd3f0
nid=0x30c1 in Object.wait() [5308000
0..53080830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x45ac3970> (a
java.util.LinkedList)
        at java.lang.Object.wait(Object.java:426)
        at
org.netbeans.core.compiler.CompilationEngineImpl$CompilerThread.nextJ
obAndTask(CompilationEngineImpl.java:172)
        - locked <0x45ac3970> (a java.util.LinkedList)
        at
org.netbeans.core.compiler.CompilationEngineImpl$CompilerThread.run(C
ompilationEngineImpl.java:185)

"AntProjectSupport.FiringProcessor" daemon prio=1
tid=0x0x828ff50 nid=0x30ba in
Object.wait() [4f314000..4f314830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x451fb1b8> (a
java.util.HashMap)
        at
org.apache.tools.ant.module.xml.AntProjectSupport$FiringProcessor.run
(AntProjectSupport.java:618)
        - locked <0x451fb1b8> (a java.util.HashMap)

"Thread-5" prio=1 tid=0x0x84601a0 nid=0x30af
runnable [50289000..50289830]
        at
java.net.PlainSocketImpl.socketAccept(Native Method)
        at
java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
        - locked <0x44fe54c8> (a
java.net.PlainSocketImpl)
        at
java.net.ServerSocket.implAccept(ServerSocket.java:439)
        at
java.net.ServerSocket.accept(ServerSocket.java:410)
        at
org.netbeans.modules.web.monitor.client.PortServer.run(PortServer.jav
a:67)

"TimerQueue" daemon prio=1 tid=0x0x86f0108
nid=0x30ac in Object.wait() [52e10000
..52e10830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x44e06798> (a
javax.swing.TimerQueue)
        at
javax.swing.TimerQueue.run(TimerQueue.java:231)
        - locked <0x44e06798> (a
javax.swing.TimerQueue)
        at java.lang.Thread.run(Thread.java:536)

"Thread-4" daemon prio=1 tid=0x0x85eb8b8
nid=0x30ab in Object.wait() [50584000..
50584830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x44cf6870> (a
org.netbeans.core.modules.ChangeFirer)
        at java.lang.Object.wait(Object.java:426)
        at
org.netbeans.core.modules.ChangeFirer.run(ChangeFirer.java:94)
        - locked <0x44cf6870> (a
org.netbeans.core.modules.ChangeFirer)

"Thread-3" daemon prio=1 tid=0x0x854b618
nid=0x30aa in Object.wait() [5048d000..
5048d830]
        at java.lang.Object.wait(Native Method)180
in Object
 at java.util.TimerThread.mainLoop(Timer.java:429)
        - locked <0x44c31bb8> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:382)

"AWT-EventQueue-0" prio=1 tid=0x0x8545b58
nid=0x30a9 in Object.wait() [5040b000.
.5040c830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x4a623210> (a java.lang.Class)
        at
sun.awt.datatransfer.ClipboardTransferable.getClipboardData(Native
Me
thod)
        at
sun.awt.datatransfer.ClipboardTransferable.fetchOneFlavor(ClipboardTr
ansferable.java:106)
        at
sun.awt.datatransfer.ClipboardTransferable.<init>(ClipboardTransferab
le.java:80)
        at
sun.awt.datatransfer.SunClipboard.getContents(SunClipboard.java:80)
        - locked <0x45269530> (a
sun.awt.motif.X11Clipboard)
        at
org.netbeans.core.NbClipboard.eventDispatched(NbClipboard.java:117)
        at
java.awt.Toolkit$SelectiveAWTEventListener.eventDispatched(Toolkit.ja
va:2118)
        at
java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java
:2012)
        at
java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java
:2011)
        at
java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java
:2011)
        at
java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java
:2011)
        at
java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java
:2011)
        at
java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java
:2011)
        at
java.awt.Toolkit.notifyAWTEventListeners(Toolkit.java:1970)
        at
java.awt.Component.dispatchEventImpl(Component.java:3513)
        at
java.awt.Container.dispatchEventImpl(Container.java:1623)
        at
java.awt.Window.dispatchEventImpl(Window.java:1585)
        at
java.awt.Component.dispatchEvent(Component.java:3439)
        at
java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.ja
va:1688)
        at
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeybo
ardFocusManager.java:734)
        at
java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFoc
usManager.java:340)
        at
java.awt.Component.dispatchEventImpl(Component.java:3468)
        at
java.awt.Container.dispatchEventImpl(Container.java:1623)
        at
java.awt.Window.dispatchEventImpl(Window.java:1585)
        at
java.awt.Component.dispatchEvent(Component.java:3439)
        at
java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
        at
java.awt.SentEvent.dispatch(SentEvent.java:50)
        at
java.awt.DefaultKeyboardFocusManager$DefaultKeyboardFocusManagerSentE
vent.dispatch(DefaultKeyboardFocusManager.java:143)
        at
java.awt.DefaultKeyboardFocusManager.sendMessage(DefaultKeyboardFocus
Manager.java:169)
        at
java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFoc
usManager.java:245)
        at
java.awt.Component.dispatchEventImpl(Component.java:3468)
        at
java.awt.Container.dispatchEventImpl(Container.java:1623)
        at
java.awt.Window.dispatchEventImpl(Window.java:1585)
        at
java.awt.Component.dispatchEvent(Component.java:3439)
        at
java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
        at
java.awt.SequencedEvent.dispatch(SequencedEvent.java:91)
 at
java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
        at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:197)
        at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:150)
        at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
        at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
        at
java.awt.EventDispatchThread.run(EventDispatchThread.java:99)

"Thread-1" daemon prio=1 tid=0x0x84fb5e0
nid=0x30a8 in Object.wait() [5038b000..
5038b830]
        at java.lang.Object.wait(Native Method)
        at
java.util.TimerThread.mainLoop(Timer.java:429)
        - locked <0x44c31cb0> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:382)

"Java2D Disposer" daemon prio=1 tid=0x0x851df90
nid=0x30a7 in Object.wait() [503
0a000..5030a830]
        at java.lang.Object.wait(Native Method)
        at
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
        - locked <0x44c31d30> (a
java.lang.ref.ReferenceQueue$Lock)
        at
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
        at sun.java2d.Disposer.run(Disposer.java:97)
        at java.lang.Thread.run(Thread.java:536)

"AWT-Motif" daemon prio=1 tid=0x0x851a4f0
nid=0x30a5 runnable [50208000..5020883
0]
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Thread.java:536)

"AWT-Shutdown" prio=1 tid=0x0x84e3e88 nid=0x30a4
in Object.wait() [50169000..501
69830]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x44bf04b0> (a java.lang.Object)
        at java.lang.Object.wait(Object.java:426)
        at
sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:259)
        - locked <0x44bf04b0> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:536)

"DestroyJavaVM" prio=1 tid=0x0x8052438 nid=0x309a
waiting on condition [0..bfffb
710]

"Signal Dispatcher" daemon prio=1 tid=0x0x80a4cf0
nid=0x30a1 waiting on conditio
n [0..0]

"Finalizer" daemon prio=1 tid=0x0x8087bf8
nid=0x309e in Object.wait() [4e470000.
.4e470830]
        at java.lang.Object.wait(Native Method)
        at
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
        - locked <0x44b9d5e0> (a
java.lang.ref.ReferenceQueue$Lock)
        at
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
        at
java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)

"Reference Handler" daemon prio=1 tid=0x0x8086100
nid=0x309d in Object.wait() [4
1fab000..41fab830]
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:426)
        at
java.lang.ref.Reference$ReferenceHandler.run(Reference.java:113)
        - locked <0x44b9d4c0> (a
java.lang.ref.Reference$Lock)
"VM Thread" prio=1 tid=0x0x8082ee8 nid=0x309c
runnable

"VM Periodic Task Thread" prio=1 tid=0x0x80a3938
nid=0x309f waiting on condition
 
"Suspend Checker Thread" prio=1 tid=0x0x80a42a0
nid=0x30a0 runnable

REPRODUCIBILITY :
This bug can be reproduced often.
(Review ID: 181123)
======================================================================

Name: jl125535 Date: 08/04/2003


This behavior also occurs with Idea from JetBrains
(http://www.intellij.com/idea/).
(Review ID: 180308)
======================================================================