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build from Jun 11, Linux, JDK1.5.0b55 Due to problems with thread semantic the progres indication in find usages dialog can be broken at any time and the whole AWT event processing can be blocked. It means no UI updates/repainting. This is because there can be arbitrary request for MDR operation called with the AWT thread that will wait for org.netbeans.modules.javacore.ExclusiveMutex.enter For an example see attached thread dump where Jave editor updates global activated nodes during computation of usages. As this update goes to the MDR everything is blocked.
The issue with nodes was fixed. The general issue of blocking AWT should be fixed by moving the code that accesses the MDR from the AWT thread. Please file particular cases where it is broken as separate issues.
Radime, can you verify this issue, please? Thanks.
I agree with Martin that we can close this now