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Bug 215493 - com.sun.jdi.VMDisconnectedException: Connection closed
Summary: com.sun.jdi.VMDisconnectedException: Connection closed
Status: RESOLVED FIXED
Alias: None
Product: debugger
Classification: Unclassified
Component: Java (show other bugs)
Version: 7.2
Hardware: All All
: P3 normal (vote)
Assignee: Martin Entlicher
URL:
Keywords: RANDOM
Depends on:
Blocks:
 
Reported: 2012-07-13 06:56 UTC by williambacchi
Modified: 2012-10-06 02:01 UTC (History)
3 users (show)

See Also:
Issue Type: DEFECT
Exception Reporter: 190708

Attachments
stacktrace (3.11 KB, text/plain)
2012-07-13 06:56 UTC, williambacchi 		Details
stacktrace (3.11 KB, text/plain)
2012-09-25 12:47 UTC, aquaglia 		Details
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Description williambacchi 2012-07-13 06:56:37 UTC 
This bug was originally marked as duplicate of bug 199510, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE 7.2 (Build 201206291011)
VM: Java HotSpot(TM) Client VM, 23.1-b03, Java(TM) SE Runtime Environment, 1.7.0_05-b05
OS: Windows XP

User Comments:
mps77: suspend debugger on breakpoint hit.
edit code.
save file.
stop debugger.
crash. :)

softwarevisualization: ended forgotten debugging session




Stacktrace: 
com.sun.jdi.VMDisconnectedException: Connection closed
   at com.sun.tools.jdi.TargetVM.send(TargetVM.java:293)
   at com.sun.tools.jdi.VirtualMachineImpl.sendToTarget(VirtualMachineImpl.java:1032)
   at com.sun.tools.jdi.PacketStream.send(PacketStream.java:59)
   at com.sun.tools.jdi.JDWP$ReferenceType$MethodsWithGeneric.enqueueCommand(JDWP.java:2814)
   at com.sun.tools.jdi.JDWP$ReferenceType$MethodsWithGeneric.process(JDWP.java:2800)
   at com.sun.tools.jdi.ReferenceTypeImpl.methods(ReferenceTypeImpl.java:461)
Comment 1 williambacchi 2012-07-13 06:56:41 UTC 
Created attachment 121993 [details]
stacktrace
Comment 2 Jiri Kovalsky 2012-07-13 08:44:37 UTC 
Product Version: NetBeans IDE 7.2 (Build 201207092359)
Java: 1.7.0_05; Java HotSpot(TM) Client VM 23.1-b03
System: Linux version 3.0.0-12-generic running on i386; UTF-8; cs_CZ (nb)
User directory: /home/cesilko/.netbeans/7.2
Cache directory: /home/cesilko/.cache/netbeans/7.2

I couldn't reproduce the crash in 7.2 FCS candidate. I toggled line 3 breakpoint and pressed Ctrl+F5 to start debugging session. When the breakpoint was hit I invoked "Debug > Pause" from main menu. I changed "Hello" to "Hi" at line 3 and pressed Ctrl+S. Pressing Shift+F5 correctly stopped the application and NetBeans didn't crash.

01   public class JavaApplication4 {
02       public static void main(String[] args) {
03           System.out.println("Hello world.");
04       }
05   }
Comment 3 Martin Entlicher 2012-07-13 09:13:40 UTC 
This is nothing serious, an exception does not necessarily mean a crash.
It's unfortunate, that LocationImpl.equals() sends something through the net and throws exceptions.
Comment 4 Martin Entlicher 2012-07-13 09:22:46 UTC 
I do not think this is reproducible, there needs to be specific timing of the actions for this bug to occur.
I can be fixed only by eliminating LocationImpl.equals() call.
Comment 5 aquaglia 2012-09-25 12:47:10 UTC 
Created attachment 124868 [details]
stacktrace

Debugging java project
Comment 6 Martin Entlicher 2012-10-05 13:59:13 UTC 
Fixed by changeset:   235106:32f448eb6f72
http://hg.netbeans.org/main/rev/32f448eb6f72
Comment 7 Quality Engineering 2012-10-06 02:01:24 UTC 
Integrated into 'main-golden', will be available in build *201210060002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
Changeset: http://hg.netbeans.org/main-golden/rev/32f448eb6f72
User: mentlicher@netbeans.org
Log: #215493: Catch VMDisconnectedException.