Build: NetBeans IDE Dev (Build 201002152000)
VM: Java HotSpot(TM) Client VM, 10.0-b23, Java(TM) SE Runtime Environment, 1.6.0_07-b06
OS: Windows XP

User Comments:
mpetras: Just started up the IDE. It appears every time the IDE starts! Even though this issue does not have serious pratical impact, I am sure it has a deep impact on the percieved quality of the IDE for new users (even external testers, evaluators, decision makers).

leonhad: I pressed the right mouse button on a project when the IDE was opening (scanning projects).

GUEST: Just tried to open another file from the Project-pane.

GUEST: starting NetBeansIDE 6.9, occurrence this error.

GUEST: just starting the app for the first time of the day when this happened. I do have one project on a network drive that it couldn't connect too - other than that, nothing fancy.

GUEST: I simply opened NetBeans, which had no projects opened (i had closed the IDE after closing all projects previously) in the Projects tab.

charlweed: Opening IDE

GUEST: I went to Application->Programming, from Main Menu, and was about to click on Netbeans 6.8--I believe--or I was simply moving the mouse across the Netbeans window, of the 1/2810 nightly build.

st3vie: I just started the application, wasn't doing anything yet.

GUEST: sei la

bix0r: Got this one right after restarting NB because I could not get to Debug Project after being Debug session got very strange (skipping breakpoints). Using php-xdebug. (Not sure if that is relevent)

GUEST: I've just clicked on the link UML tout creat a new project

GUEST: Just opened IDE

GUEST: opening netbeans

sunflower: The exception pops up during the IDE starting

GUEST: opening netebans

GUEST: This error occured when I started the program

GUEST: opening ide

maghiel: Started thsi build for the first time

charlweed: Opening projects.

GUEST: starting up

GUEST: Start NetBeans IDE.

GUEST: Launching the IDE

GUEST: start netbean

GUEST: starting the ide

GUEST: opening netbeans

GUEST: Just starting up Netbeans

emiddio: startup

GUEST: Just opening/starting the the application caused the error.

GUEST: startet netbeans

emiddio: after 2 updates

maghiel: Installed updates to plugins and restarted NetBeans.
This was a fresh install on a fresh new system.

GUEST: Bringing up NetBeans

GUEST: I've simply opened Netbeans

GUEST: Starting NetBeans

b166er: update NB

GUEST: I just start netbean 6.9M1 after a weekend

charlweed: Opening Project.

pmadley: Grrrr.... Source > Format

Threw this error.

This literally just after I restarted Netbeans.  How did I restart it?  Well I killed it in Task Manager as the "close" button doesn't do anything when clicked; CPU was at 52%

So yep, within 2 minutes of restarting the IDE this happened!!!

- Vista, 3gb RAM, 2.2ghz

GUEST: attempting to install SOA plugin

GUEST: Simply executed the NetBeans 6.9M1 platform.

GUEST: Loading, "scanning projects..."

GUEST: Initiated a code-completion, then hit backspace.

GUEST: I opened Netbeans 6.9M1 and I clicked on the "New Project" button, when this error occurred.
I'm running Ubuntu Linux 9.10 with JRE 1.6 update 15

mpapis: opened new project dialog

stefan79: Started NetBeans. Exception occured while Scanning projects.

zolta: Reported issue #341045

GUEST: Nothing

GUEST: Opened IDE

GUEST: NetBeans started, and there was this error

GUEST: starting

epdv: This happens from time to time - don't know why or when.

GUEST: Loaded up editor, project loaded on left when started up

GUEST: 1.) closing NetBeans (with some open Project Files)
2.) Update SVN Working Copy of the Project
3.) start NetBeans again

GUEST: i didnt do nothin, .. problem occured right after launching netbeans.

GUEST: starting the IDE

charlweed: Strating NB

mps77: update nb and restart

GUEST: I simply fired up NetBeans, and this error popped up.

GUEST: Restart of Netbeans after intalling Mercurial and Netbeans Source browsing (Mercurial) plugins

sheff: Starting NetBeans 6.9 M1




Stacktrace: 
java.util.ConcurrentModificationException
   at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:0)
   at java.util.LinkedList$ListItr.previous(LinkedList.java:0)
   at org.openide.util.EditableProperties.addItem(EditableProperties.java:392)
   at org.openide.util.EditableProperties.put(EditableProperties.java:250)
   at org.openide.util.EditableProperties.put(EditableProperties.java:84)
   at java.util.AbstractMap.putAll(AbstractMap.java:0)