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I discovered it in automated tests but it is also manually reproducible on the latest continuous build 20040310-0154. - create a Java Main Class from template - when it is open in editor right-click the tab and select "Close All Documents" item (do it as quickly as possible - it seems it is a race condition) - it freezes (see attached thread dump) I thought it is somehow connected to a dead lock in editor (issue 40766) but from the thread dump it seems like an openide problem. Tested in build 20040310-0154, JDK1.4.2_03, WindowsXP.
Created attachment 13925 [details] Thread dump
*** This issue has been marked as a duplicate of 40879 ***
Verified.