This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
Event listeners must not needlessly delay program execution. Use of Thread.sleep(400) in handleProgressEvent is completely wrong as it will block caller (that might be communicating with remote client so any delay can be source of troubles). Also if I use apparent workaround and fire event asynchronously from newly created Thread or just by calling RequestProcessor.getDefault.post() it will not achieve its purpose at all.
Remove sleep(400) in handleProgressEvent.