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Bug 160956

Summary:	OutOfMemoryError: Requested array size exceeds VM limit
Product:	php	Reporter:	charlie_smith <charlie_smith>
Component:	Debugger	Assignee:	rmatous <rmatous>
Status:	VERIFIED FIXED
Severity:	blocker	CC:	abajja, dprusa, fzamboj, laurin1, mentlicher, pjiricka, sandange, tprochazka, yudiset
Priority:	P2
Version:	6.x
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:
Attachments:	Messages Log suggested fix stacktrace stacktrace

Description charlie_smith 2009-03-23 21:46:21 UTC

When clicking the variables tab while debugging this error is received.

Comment 1 charlie_smith 2009-03-23 21:47:47 UTC

Created attachment 78694 [details]
Messages Log

Comment 2 rmatous 2009-03-24 21:52:20 UTC

*** Issue 161056 has been marked as a duplicate of this issue. ***

Comment 3 rmatous 2009-03-24 21:53:10 UTC

increasing to P2

Comment 4 rmatous 2009-03-24 22:08:24 UTC

*** Issue 159296 has been marked as a duplicate of this issue. ***

Comment 5 rmatous 2009-03-24 22:10:42 UTC

P2 or P1 will be evaluated and priority will be changed appropriately

Comment 6 Exceptions Reporter 2009-03-25 17:12:24 UTC

This issue has already 10 duplicates 
see http://statistics.netbeans.org/exceptions/detail.do?id=148126

Comment 7 rmatous 2009-03-25 18:37:52 UTC

Created attachment 78853 [details]
suggested fix

Comment 8 rmatous 2009-03-25 18:42:48 UTC

Deserves evaluation if  NestedTreeModelFilter.getChildrenCount is right? Please comment!
NestedTreeModelFilter:
        public int getChildrenCount(TreeModel original, Object node) throws UnknownTypeException {
            return Integer.MAX_VALUE; // [TODO]
        }


Called in this thread:
"Debugger Values Evaluator" daemon prio=1 tid=0x083ff9d8 nid=0xb65 runnable [0x808f7000..0x808f7dc0]
        at
org.netbeans.modules.debugger.ui.views.ViewModelListener$NestedTreeModelFilter.getChildrenCount(ViewModelListener.java:659)
        at org.netbeans.spi.viewmodel.Models$CompoundTreeModel.getChildrenCount(Models.java:714)
        at org.netbeans.modules.php.dbgp.models.VariablesModelFilter.getFilteredChildren(VariablesModelFilter.java:145)
        at org.netbeans.modules.php.dbgp.models.VariablesModelFilter.getChildrenCount(VariablesModelFilter.java:112)
        at org.netbeans.spi.viewmodel.Models$CompoundTreeModel.getChildrenCount(Models.java:714)
        at org.netbeans.spi.viewmodel.Models$CompoundModel.getChildrenCount(Models.java:3158)
        at org.netbeans.modules.viewmodel.TreeModelNode$TreeModelChildren.evaluateLazily(TreeModelNode.java:804)
        at org.netbeans.modules.viewmodel.TreeModelNode$LazyEvaluator.run(TreeModelNode.java:1253)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)

Comment 9 Filip Zamboj 2009-03-25 18:45:37 UTC

suggested fix by rmatous was checkes and appears to behave properly.

Comment 10 Martin Entlicher 2009-03-26 10:46:11 UTC

FYI: The getChildrenCount() was fixed by Dan in http://hg.netbeans.org/main-silver?cmd=changeset;node=e0a9fb9f70da

Anyway, since many models have to do almost the same work in getChildren() and getChildrenCount(), we just return
Integer.MAX_VALUE in such models for performance reasons. There's no real use for getChildrenCount() yet.
Therefore it's always a good idea to work with Math.min(<my children count>, <requested children count>).

Comment 11 Filip Zamboj 2009-03-26 14:38:09 UTC

Build: NetBeans IDE Dev (Build 090326)
VM: Java HotSpot(TM) 64-Bit Server VM, 11.3-b02, Java(TM) SE Runtime Environment, 1.6.0_13-b02
OS: Linux, 2.6.27-11-generic, amd64

User Comments: 
Thrown when opening variables window in debugging session. 

Stacktrace: 
java.lang.OutOfMemoryError: Requested array size exceeds VM limit
        at java.util.ArrayList.<init>(ArrayList.java:112)
        at org.netbeans.modules.php.dbgp.models.VariablesModelFilter.getFilteredChildren(VariablesModelFilter.java:146)
        at org.netbeans.modules.php.dbgp.models.VariablesModelFilter.getChildrenCount(VariablesModelFilter.java:112)
        at org.netbeans.spi.viewmodel.Models$CompoundTreeModel.getChildrenCount(Models.java:714)
        at org.netbeans.spi.viewmodel.Models$CompoundModel.getChildrenCount(Models.java:3158)
        at org.netbeans.modules.viewmodel.TreeModelNode$TreeModelChildren.evaluateLazily(TreeModelNode.java:804)

Comment 12 Filip Zamboj 2009-03-26 14:38:13 UTC

Created attachment 78908 [details]
stacktrace

Comment 13 rmatous 2009-03-26 14:40:26 UTC

Fixed in web-main:
http://hg.netbeans.org/web-main/rev/6c8ef9ceab89

Filip, this fix probably should be fixed also into M3 clone when its ready. Do you agree?

Comment 14 rmatous 2009-03-27 13:24:48 UTC

Fixed into M3:
http://hg.netbeans.org/release67_m3/rev/f799b2cb28a3

Comment 15 Filip Zamboj 2009-03-30 11:57:08 UTC

this should and was fixed in 6.7 M3. issue verified

Comment 16 yudiset 2009-03-31 07:54:04 UTC

Build: NetBeans IDE Dev (Build 200903250219)
VM: Java HotSpot(TM) Client VM, 11.0-b16, Java(TM) SE Runtime Environment, 1.6.0_11-b03
OS: Windows XP, 5.1, x86

User Comments: 


Stacktrace: 
java.lang.OutOfMemoryError: Requested array size exceeds VM limit
        at java.util.ArrayList.<init>(ArrayList.java:112)
        at org.netbeans.modules.php.dbgp.models.VariablesModelFilter.getFilteredChildren(VariablesModelFilter.java:146)
        at org.netbeans.modules.php.dbgp.models.VariablesModelFilter.getChildrenCount(VariablesModelFilter.java:112)
        at org.netbeans.spi.viewmodel.Models$CompoundTreeModel.getChildrenCount(Models.java:714)
        at org.netbeans.spi.viewmodel.Models$CompoundModel.getChildrenCount(Models.java:3158)
        at org.netbeans.modules.viewmodel.TreeModelNode$TreeModelChildren.evaluateLazily(TreeModelNode.java:804)

Comment 17 yudiset 2009-03-31 07:54:09 UTC

Created attachment 79111 [details]
stacktrace