This bug was originally marked as duplicate of bug 162541, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE Dev (Build 201012130001)
VM: Java HotSpot(TM) Client VM, 17.1-b03, Java(TM) SE Runtime Environment, 1.6.0_22-b04
OS: Windows Vista

User Comments:
Chiana: Tried to rename an enterprice project.




Stacktrace: 
java.lang.IllegalStateException: Error in org.openide.nodes.EntrySupport$Default with entry Children.Keys.KE[entProject$CarAntArtifact@1fdfc36, broken=false, additional={pathInDeployment=/},0] from among [Children.Keys.KE[entProject$CarAntArtifact@1fdfc36, broken=false, additional={pathInDeployment=/},0], Children.Array.AE[]] in {Children.Keys.KE[entProject$CarAntArtifact@1fdfc36, broken=false, additional={pathInDeployment=/},0]=Children.Info[Children.Keys.KE[entProject$CarAntArtifact@1fdfc36, broken=false, additional={pathInDeployment=/},0],length=1], Children.Array.AE[]=Children.Info[Children.Array.AE[],length=0]} probably caused by faulty key implementation. The key hashCode() and equals() methods must behave as for an IMMUTABLE object and the hashCode() must return the same value for equals() keys.
   at org.openide.nodes.EntrySupport$Default.checkInfo(EntrySupport.java:368)
   at org.openide.nodes.EntrySupport$Default.updateOrder(EntrySupport.java:421)
   at org.openide.nodes.EntrySupport$Default.setEntries(EntrySupport.java:358)
   at org.openide.nodes.Children$Keys$2.run(Children.java:1542)
   at org.openide.util.Mutex$1Exec.run(Mutex.java:1244)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1907)