NetBeans Java Debugger Connects once, but not again

[David Fort]

On 2 different computers, when I first installed NetBeans, I was able to run and debug one of the sample programs.

But after that first success, I haven't been able to do it again.

This is the output I get, starting with what looks like some successful messages from constructors and whatnot.
(i have a breakpoint set in the constructor that seems to be printing the "Iterative Robot ConstructorStart" message):
[cRIO] FPGA Hardware GUID: 0xad9a5591cc64e4df756d77d1b57a549e
[cRIO] FPGA Software GUID: 0xad9a5591cc64e4df756d77d1b57a549e
[cRIO] IterativeRobot Constructor Start
[cRIO] IterativeRobot Constructor Finish
Waiting for connection from debugger on serversocket://:2900
Synchronizing debug state with VM...............
Established connection to Debugger (handshake took 8376ms)
[cRIO] !!! no thread found waiting on event=== DEAD-LOCK STATUS: ===
[cRIO] --- isolate 2 "edu.wpi.first.wpilibj.samples.CircleTrackerDemo" (ALIVE) status ---
[cRIO] thread Thread-10 priority: 5 state: ALIVE queue: RUNNABLE
[cRIO] at com.sun.squawk.VMThread.monitorWait(VMThread.java: 2298)
[cRIO] at java.lang.Object.wait(Object.java:162)
[cRIO] at java.util.TimerThread.mainLoop(Timer.java:439)
[cRIO] at java.util.TimerThread.run(Timer.java:391)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread Thread-9 priority: 5 state: ALIVE queue: RUNNABLE
[cRIO] at com.sun.squawk.VMThread.monitorWait(VMThread.java: 2298)
[cRIO] at java.lang.Object.wait(Object.java:162)
[cRIO] at java.util.TimerThread.mainLoop(Timer.java:439)
[cRIO] at java.util.TimerThread.run(Timer.java:391)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread FRCDriverStation priority: 5 state: ALIVE queue: RUNNABLE
[cRIO] at com.sun.squawk.VMThread.waitForEvent(VMThread.java :1863)
[cRIO] at com.sun.squawk.NativeUnsafe.waitForBlockingFunctio n(NativeUnsafe.java:641)
[cRIO] at com.sun.cldc.jna.BlockingFunction.call2(BlockingFu nction.java:113)
[cRIO] at com.sun.cldc.jna.Function.call2(Function.java:271)
[cRIO] in static method #1 of edu.wpi.first.wpilibj.communication.FRCControl(bci =15)
[cRIO] in virtual method #12 of edu.wpi.first.wpilibj.DriverStation(bci=10)
[cRIO] in virtual method #11 of edu.wpi.first.wpilibj.DriverStation(bci=9)
[cRIO] in static method #2 of edu.wpi.first.wpilibj.DriverStation(bci=5)
[cRIO] at edu.wpi.first.wpilibj.DriverStation$DriverStationT ask.run(bci=6)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread edu.wpi.first.wpilibj.samples.CircleTrackerDemo - main priority: 5 state: ALIVE queue: RUNNABLE
[cRIO] at com.sun.squawk.VMThread.monitorWait(VMThread.java: 2298)
[cRIO] at java.lang.Object.wait(Object.java:162)
[cRIO] at java.lang.Object.wait(Object.java:257)
[cRIO] at com.sun.squawk.debugger.EventNotifier.produceEvent (EventNotifier.java:122)
[cRIO] at com.sun.squawk.debugger.EventManager.produceEvent( EventManager.java:184)
[cRIO] at com.sun.squawk.debugger.sda.SDA.notifyEvent(SDA.ja va:1044)
[cRIO] at com.sun.squawk.imp.MIDletMainWrapper.main(MIDletMa inWrapper.java:104)
[cRIO] at com.sun.squawk.Klass.main(Klass.java:2997)
[cRIO] at com.sun.squawk.Isolate.run(Isolate.java:1554)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] --- isolate 1 "com.sun.squawk.debugger.sda.SDA" (ALIVE) status ---
[cRIO] thread EventManager priority: 5 state: ALIVE queue: CONDVAR waiting on condvar for object com.sun.squawk.debugger.EventNotifier@10
[cRIO] at com.sun.squawk.VMThread.monitorWait(VMThread.java: 2298)
[cRIO] at java.lang.Object.wait(Object.java:162)
[cRIO] at java.lang.Object.wait(Object.java:257)
[cRIO] at com.sun.squawk.debugger.EventNotifier.consumeEvent (EventNotifier.java:156)
[cRIO] at com.sun.squawk.debugger.EventManager.run(EventMana ger.java:65)
[cRIO] at com.sun.squawk.debugger.sda.SDA$SDAEventManager.ru n(SDA.java:608)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread SDPListener priority: 5 state: ALIVE queue: EVENT
[cRIO] at com.sun.squawk.VMThread.waitForOSEvent(VMThread.ja va:1910)
[cRIO] at com.sun.squawk.platform.posix.SystemEventsImpl.wai tForReadEvent(SystemEventsImpl.java:306)
[cRIO] at com.sun.squawk.platform.posix.GCFSocketsImpl.readB uf(GCFSocketsImpl.java:303)
[cRIO] at com.sun.squawk.platform.posix.GCFSocketsImpl.readB yte(GCFSocketsImpl.java:337)
[cRIO] at com.sun.squawk.io.j2me.socket.PrivateInputStream.r ead(Protocol.java:356)
[cRIO] at java.io.DataInputStream.read(DataInputStream.java: 91)
[cRIO] at java.io.DataInputStream.readInt(DataInputStream.ja va:332)
[cRIO] at com.sun.squawk.debugger.JDWPConnection.readPacket( JDWPConnection.java:192)
[cRIO] at com.sun.squawk.debugger.JDWPListener.run(JDWPListe ner.java:122)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread SDA priority: 5 state: ALIVE queue: JOIN
[cRIO] at com.sun.squawk.VMThread.join(VMThread.java:484)
[cRIO] at java.lang.Thread.join(Thread.java:323)
[cRIO] at com.sun.squawk.debugger.sda.SDA.go(SDA.java:1381)
[cRIO] at com.sun.squawk.debugger.sda.SDA.main(SDA.java:1441 )
[cRIO] at com.sun.squawk.Klass.main(Klass.java:2997)
[cRIO] at com.sun.squawk.Isolate.run(Isolate.java:1554)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] --- isolate 0 "com.sun.squawk.JavaApplicationManager" (ALIVE) status ---
[cRIO] thread IOHandler priority: 5 state: ALIVE queue: CONDVAR waiting on condvar for object com.sun.squawk.platform.posix.SystemEventsImpl@11
[cRIO] at com.sun.squawk.VM.reifyStack(VM.java:1029)
[cRIO] at com.sun.squawk.VMThread.printStackTrace(VMThread.j ava:1752)
[cRIO] at com.sun.squawk.Isolate.printAllThreadStates(Isolat e.java:2696)
[cRIO] at com.sun.squawk.Isolate.printAllIsolateStates(Isola te.java:2712)
[cRIO] at com.sun.squawk.VMThread.rescheduleNext(VMThread.ja va:1606)
[cRIO] at com.sun.squawk.VMThread.reschedule(VMThread.java:1 781)
[cRIO] at com.sun.squawk.VMThread.monitorWait(VMThread.java: 2298)
[cRIO] at java.lang.Object.wait(Object.java:162)
[cRIO] at com.sun.squawk.platform.posix.SystemEventsImpl.wai tForEvents(SystemEventsImpl.java:223)
[cRIO] at com.sun.squawk.platform.SystemEvents.run(SystemEve nts.java:71)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread primitve-thread priority: 5 state: ALIVE queue: ISOLATEJOIN
[cRIO] at com.sun.squawk.VMThread.isolateJoin(VMThread.java: 504)
[cRIO] at com.sun.squawk.Isolate.join(Isolate.java:1575)
[cRIO] at com.sun.squawk.JavaApplicationManager.main(JavaApp licationManager.java:150)
[cRIO] at com.sun.squawk.Klass.main(Klass.java:2997)
[cRIO] at com.sun.squawk.Isolate.run(Isolate.java:1554)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)


none of the debug buttons, such as step or pause or go are enabled.

Suggestions anyone?

Thanks much.

[derekwhite]

I'm not seeing that in tests here. I'm using NetBeans 6.7 on Mac. Let me know what version you are using.

Also, the error message shown could be related to a networking code bug, not necessarily a debugging bug. If possible, could you send your robot program? You can send to derek<dot>white@sun.com (replacing <dot> with . )

Thanks!

[derekwhite]

OK, I see the error also when I run from Windows (for some reason). No work-around is available, but a fix is in progress...

[ezygmont708]

Also am having a similar issue... the debug code is below... It works with a hardwired connection(ethernet) but when wireless we are not able to de-bug.


Established connection to Debugger (handshake took 1687ms)
[cRIO] !!! no thread found waiting on event=== DEAD-LOCK STATUS: ===
[cRIO] --- isolate 2 "edu.wpi.first.wpilibj.templates.BreakawayRobot" (ALIVE) status ---
[cRIO] thread FRCDriverStation priority: 5 state: ALIVE queue: RUNNABLE
[cRIO] at com.sun.squawk.VMThread.waitForEvent(VMThread.java :1863)
[cRIO] at com.sun.squawk.NativeUnsafe.waitForBlockingFunctio n(NativeUnsafe.java:641)
[cRIO] at com.sun.cldc.jna.BlockingFunction.call4(BlockingFu nction.java:137)
[cRIO] at com.sun.cldc.jna.Function.call4(Function.java:321)
[cRIO] in static method #2 of edu.wpi.first.wpilibj.communication.FRCControl(bci =27)
[cRIO] in virtual method #10 of edu.wpi.first.wpilibj.DriverStationEnhancedIO(bci= 200)
[cRIO] in virtual method #11 of edu.wpi.first.wpilibj.DriverStation(bci=13)
[cRIO] in static method #2 of edu.wpi.first.wpilibj.DriverStation(bci=5)
[cRIO] at edu.wpi.first.wpilibj.DriverStation$DriverStationT ask.run(bci=6)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread edu.wpi.first.wpilibj.templates.BreakawayRobot - main priority: 5 state: ALIVE queue: RUNNABLE
[cRIO] at com.sun.squawk.VMThread.monitorWait(VMThread.java: 2298)
[cRIO] at java.lang.Object.wait(Object.java:162)
[cRIO] at java.lang.Object.wait(Object.java:257)
[cRIO] at com.sun.squawk.debugger.EventNotifier.produceEvent (EventNotifier.java:122)
[cRIO] at com.sun.squawk.debugger.EventManager.produceEvent( EventManager.java:184)
[cRIO] at com.sun.squawk.debugger.sda.SDA.notifyEvent(SDA.ja va:1044)
[cRIO] at com.sun.squawk.imp.MIDletMainWrapper.main(MIDletMa inWrapper.java:104)
[cRIO] at com.sun.squawk.Klass.main(Klass.java:2997)
[cRIO] at com.sun.squawk.Isolate.run(Isolate.java:1554)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] --- isolate 1 "com.sun.squawk.debugger.sda.SDA" (ALIVE) status ---
[cRIO] thread EventManager priority: 5 state: ALIVE queue: CONDVAR waiting on condvar for object com.sun.squawk.debugger.EventNotifier@e
[cRIO] at com.sun.squawk.VMThread.monitorWait(VMThread.java: 2298)
[cRIO] at java.lang.Object.wait(Object.java:162)
[cRIO] at java.lang.Object.wait(Object.java:257)
[cRIO] at com.sun.squawk.debugger.EventNotifier.consumeEvent (EventNotifier.java:156)
[cRIO] at com.sun.squawk.debugger.EventManager.run(EventMana ger.java:65)
[cRIO] at com.sun.squawk.debugger.sda.SDA$SDAEventManager.ru n(SDA.java:608)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread SDPListener priority: 5 state: ALIVE queue: EVENT
[cRIO] at com.sun.squawk.VMThread.waitForOSEvent(VMThread.ja va:1910)
[cRIO] at com.sun.squawk.platform.posix.SystemEventsImpl.wai tForReadEvent(SystemEventsImpl.java:306)
[cRIO] at com.sun.squawk.platform.posix.GCFSocketsImpl.readB uf(GCFSocketsImpl.java:303)
[cRIO] at com.sun.squawk.platform.posix.GCFSocketsImpl.readB yte(GCFSocketsImpl.java:337)
[cRIO] at com.sun.squawk.io.j2me.socket.PrivateInputStream.r ead(Protocol.java:356)
[cRIO] at java.io.DataInputStream.read(DataInputStream.java: 91)
[cRIO] at java.io.DataInputStream.readInt(DataInputStream.ja va:332)
[cRIO] at com.sun.squawk.debugger.JDWPConnection.readPacket( JDWPConnection.java:192)
[cRIO] at com.sun.squawk.debugger.JDWPListener.run(JDWPListe ner.java:122)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread SDA priority: 5 state: ALIVE queue: JOIN
[cRIO] at com.sun.squawk.VMThread.join(VMThread.java:484)
[cRIO] at java.lang.Thread.join(Thread.java:323)
[cRIO] at com.sun.squawk.debugger.sda.SDA.go(SDA.java:1381)
[cRIO] at com.sun.squawk.debugger.sda.SDA.main(SDA.java:1441 )
[cRIO] at com.sun.squawk.Klass.main(Klass.java:2997)
[cRIO] at com.sun.squawk.Isolate.run(Isolate.java:1554)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] --- isolate 0 "com.sun.squawk.JavaApplicationManager" (ALIVE) status ---
[cRIO] thread IOHandler priority: 5 state: ALIVE queue: CONDVAR waiting on condvar for object com.sun.squawk.platform.posix.SystemEventsImpl@f
[cRIO] at com.sun.squawk.VM.reifyStack(VM.java:1029)
[cRIO] at com.sun.squawk.VMThread.printStackTrace(VMThread.j ava:1752)
[cRIO] at com.sun.squawk.Isolate.printAllThreadStates(Isolat e.java:2696)
[cRIO] at com.sun.squawk.Isolate.printAllIsolateStates(Isola te.java:2712)
[cRIO] at com.sun.squawk.VMThread.rescheduleNext(VMThread.ja va:1606)
[cRIO] at com.sun.squawk.VMThread.reschedule(VMThread.java:1 781)
[cRIO] at com.sun.squawk.VMThread.monitorWait(VMThread.java: 2298)
[cRIO] at java.lang.Object.wait(Object.java:162)
[cRIO] at com.sun.squawk.platform.posix.SystemEventsImpl.wai tForEvents(SystemEventsImpl.java:223)
[cRIO] at com.sun.squawk.platform.SystemEvents.run(SystemEve nts.java:71)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] thread primitve-thread priority: 5 state: ALIVE queue: ISOLATEJOIN
[cRIO] at com.sun.squawk.VMThread.isolateJoin(VMThread.java: 504)
[cRIO] at com.sun.squawk.Isolate.join(Isolate.java:1575)
[cRIO] at com.sun.squawk.JavaApplicationManager.main(JavaApp licationManager.java:150)
[cRIO] at com.sun.squawk.Klass.main(Klass.java:2997)
[cRIO] at com.sun.squawk.Isolate.run(Isolate.java:1554)
[cRIO] at java.lang.Thread.run(Thread.java:231)
[cRIO] at com.sun.squawk.VMThread.callRun(VMThread.java:1499 )
[cRIO] at com.sun.squawk.VM.callRun(VM.java:305)
[cRIO] task 0x2179ef8 (FTP Server Connection Thread) deleted: errno=22 (0x16) status=0 (0)
[cRIO] task 0x2179ef8 (FTP Server Connection Thread) deleted: errno=22 (0x16) status=0 (0)

Thanks,