NullPointerException in FourColorTree using UniqueList

[ernieyu]

Hi,

We sometimes get an NPE in FourColorTree from within UniqueList.  We are using version 1.7.0.

java.lang.NullPointerException
    at ca.odell.glazedlists.impl.adt.barcode2.FourColorTree.convertIndexColor(FourColorTree.java:875)
    at ca.odell.glazedlists.event.Tree4Deltas.update(Tree4Deltas.java:73)
    at ca.odell.glazedlists.event.ListEventAssembler$Tree4DeltasAssembler.addChange(ListEventAssembler.java:545)
    at ca.odell.glazedlists.event.ListEventAssembler.addChange(ListEventAssembler.java:150)
    at ca.odell.glazedlists.event.ListEventAssembler.addChange(ListEventAssembler.java:156)
    at ca.odell.glazedlists.event.ListEventAssembler.addUpdate(ListEventAssembler.java:174)
    at ca.odell.glazedlists.UniqueList$GrouperClient.groupChanged(UniqueList.java:108)
    at ca.odell.glazedlists.impl.Grouper.listChanged(Grouper.java:190)
    at ca.odell.glazedlists.UniqueList.listChanged(UniqueList.java:209)
    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter$ListEventFormat.fire(ListEventAssembler.java:869)
    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter$ListEventFormat.fire(ListEventAssembler.java:861)
    at ca.odell.glazedlists.event.SequenceDependenciesEventPublisher$SubjectAndListener.firePendingEvent(SequenceDependenciesEventPublisher.java:435)
    at ca.odell.glazedlists.event.SequenceDependenciesEventPublisher.fireEvent(SequenceDependenciesEventPublisher.java:334)
    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter.fireEvent(ListEventAssembler.java:855)
    at ca.odell.glazedlists.event.ListEventAssembler$AssemblerHelper.commitEvent(ListEventAssembler.java:389)
    at ca.odell.glazedlists.event.ListEventAssembler.commitEvent(ListEventAssembler.java:226)
    at ca.odell.glazedlists.BasicEventList.add(BasicEventList.java:125)
    at ca.odell.glazedlists.impl.ThreadSafeList.add(ThreadSafeList.java:178)

It is difficult to reproduce, but we think it occurs when a new element is added to the unique list. All events should be occuring on the Swing EDT.  Our complete list chain is long, and we feed list selection back into the chain at FilterList1:

ThreadSafeList -> GroupingList -> FunctionList -> ObservableList -> FilterList1 -> FunctionList -> FilterList2 -> UniqueList -> SortedList -> EventSelectionModel -> Matcher -> MatcherEditor -> FilterList1

I'm thinking about writing my own code to replace the UniqueList piece.

Any suggestions would be appreciated.

Regards,
Ernie Yu

[Kevin Day-7]

Some parts of this message have been removed. Learn more about Nabble's security policy.

Just a thought, probably doesn't apply in this case, but I figured it wouldn't hurt to ask:

 

Are you adding elements directly to the unique list, or to the ThreadSafeList?  If you are adding directly to any list except the ThreadSafeList, are you using proper locking semantics on the list pipeline?

 

- K

 

----------------------- Original Message -----------------------

  

From: ernieyu eyu@...

To: users@...

Cc: 

Date: Fri, 15 May 2009 09:46:11 -0700 (PDT)

Subject: NullPointerException in FourColorTree using UniqueList

  

Hi,

We sometimes get an NPE in FourColorTree from within UniqueList.  We are
using version 1.7.0.

java.lang.NullPointerException
   at
ca.odell.glazedlists.impl.adt.barcode2.FourColorTree.convertIndexColor(FourColorTree.java:875)
   at ca.odell.glazedlists.event.Tree4Deltas.update(Tree4Deltas.java:73)
   at
ca.odell.glazedlists.event.ListEventAssembler$Tree4DeltasAssembler.addChange(ListEventAssembler.java:545)
   at
ca.odell.glazedlists.event.ListEventAssembler.addChange(ListEventAssembler.java:150)
   at
ca.odell.glazedlists.event.ListEventAssembler.addChange(ListEventAssembler.java:156)
   at
ca.odell.glazedlists.event.ListEventAssembler.addUpdate(ListEventAssembler.java:174)
   at
ca.odell.glazedlists.UniqueList$GrouperClient.groupChanged(UniqueList.java:108)
   at ca.odell.glazedli sts.impl.Grouper.listChanged(Grouper.java:190)
   at ca.odell.glazedlists.UniqueList.listChanged(UniqueList.java:209)
   at
ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter$ListEventFormat.fire(ListEventAssembler.java:869)
   at
ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter$ListEventFormat.fire(ListEventAssembler.java:861)
   at
ca.odell.glazedlists.event.SequenceDependenciesEventPublisher$SubjectAndListener.firePendingEvent(SequenceDependenciesEventPublisher.java:435)
   at
ca.odell.glazedlists.event.SequenceDependenciesEventPublisher.fireEvent(SequenceDependenciesEventPublisher.java:334)
   at
ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter.fireEvent(ListEventAssembler.java:855)
   at
ca.odell.glazedlists.event.ListEventAssembler$AssemblerHelper.commi tEvent(ListEventAssembler.java:389)
   at
ca.odell.glazedlists.event.ListEventAssembler.commitEvent(ListEventAssembler.java:226)
   at ca.odell.glazedlists.BasicEventList.add(BasicEventList.java:125)
   at ca.odell.glazedlists.impl.ThreadSafeList.add(ThreadSafeList.java:178)

It is difficult to reproduce, but we think it occurs when a new element is
added to the unique list. All events should be occuring on the Swing EDT.
Our complete list chain is long, and we feed list selection back into the
chain at FilterList1:

ThreadSafeList -> GroupingList -> FunctionList -> ObservableList ->
FilterList1 -> FunctionList -> FilterList2 -> UniqueList -> SortedList ->
EventSelectionModel -> Matcher -> MatcherEditor -> FilterList1

I'm thinking about writing my own code to replace the UniqueList piece.

Any suggestions would be appreciated.

Regards,< BR>Ernie Yu
--
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[ernieyu]

We're only adding elements to ThreadSafeList.

Ernie

Kevin Day wrote:

Just a thought, probably doesn't apply in this case, but I figured it wouldn't hurt to ask:
 
Are you adding elements directly to the unique list, or to the ThreadSafeList?  If you are adding directly to any list except the ThreadSafeList, are you using proper locking semantics on the list pipeline?
 
- K
 

----------------------- Original Message -----------------------
  
From: ernieyu <[e-mail]>
To:  [e-mail]
Cc: 
Date: Fri, 15 May 2009 09:46:11 -0700 (PDT)
Subject: NullPointerException in FourColorTree using UniqueList
  
Hi, We sometimes get an NPE in FourColorTree from within UniqueList.  We are using version 1.7.0. java.lang.NullPointerException    at ca.odell.glazedlists.impl.adt.barcode2.FourColorTree.convertIndexColor(FourColorTree.java:875)    at ca.odell.glazedlists.event.Tree4Deltas.update(Tree4Deltas.java:73)    at ca.odell.glazedlists.event.ListEventAssembler$Tree4DeltasAssembler.addChange(ListEventAssembler.java:545)    at ca.odell.glazedlists.event.ListEventAssembler.addChange(ListEventAssembler.java:150)    at ca.odell.glazedlists.event.ListEventAssembler.addChange(ListEventAssembler.java:156)    at ca.odell.glazedlists.event.ListEventAssembler.addUpdate(ListEventAssembler.java:174)    at ca.odell.glazedlists.UniqueList$GrouperClient.groupChanged(UniqueList.java:108)    at ca.odell.glazedli
 sts.impl.Grouper.listChanged(Grouper.java:190)    at ca.odell.glazedlists.UniqueList.listChanged(UniqueList.java:209)    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter$ListEventFormat.fire(ListEventAssembler.java:869)    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter$ListEventFormat.fire(ListEventAssembler.java:861)    at ca.odell.glazedlists.event.SequenceDependenciesEventPublisher$SubjectAndListener.firePendingEvent(SequenceDependenciesEventPublisher.java:435)    at ca.odell.glazedlists.event.SequenceDependenciesEventPublisher.fireEvent(SequenceDependenciesEventPublisher.java:334)    at ca.odell.glazedlists.event.ListEventAssembler$ListSequencePublisherAdapter.fireEvent(ListEventAssembler.java:855)    at ca.odell.glazedlists.event.ListEventAssembler$AssemblerHelper.commi
 tEvent(ListEventAssembler.java:389)    at ca.odell.glazedlists.event.ListEventAssembler.commitEvent(ListEventAssembler.java:226)    at ca.odell.glazedlists.BasicEventList.add(BasicEventList.java:125)    at ca.odell.glazedlists.impl.ThreadSafeList.add(ThreadSafeList.java:178) It is difficult to reproduce, but we think it occurs when a new element is added to the unique list. All events should be occuring on the Swing EDT. Our complete list chain is long, and we feed list selection back into the chain at FilterList1: ThreadSafeList -> GroupingList -> FunctionList -> ObservableList -> FilterList1 -> FunctionList -> FilterList2 -> UniqueList -> SortedList -> EventSelectionModel -> Matcher -> MatcherEditor -> FilterList1 I'm thinking about writing my own code to replace the UniqueList piece. Any suggestions would be appreciated. Regards,<
 BR>Ernie Yu -- View this message in context: http://www.nabble.com/NullPointerException-in-FourColorTree-using-UniqueList-tp23563519p23563519.html Sent from the GlazedLists - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [e-mail] For additional commands, e-mail: [e-mail]

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