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Created attachment 113918 [details] Thread dump Dev build, JDK 6, was just closing a Maven project and opening a j2seproject. Compare "Parsing & Indexing Loop (...)" to "Opening projects". AnnotationProcessingQueryImpl.getAnnotationProcessingOptions should not call foreign code while holding a private lock I guess.
Fixed jet-main a2252d02fa81
Integrated into 'main-golden' Changeset: http://hg.netbeans.org/main-golden/rev/a2252d02fa81 User: Tomas Zezula <tzezula@netbeans.org> Log: #206079:Deadlock in AnnotationProcessingQueryImpl vs. project mutex