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[NB build 051121 /source update via CVS started on 15:01 GMT/, Apache Ant version 1.6.5 compiled on June 2 2005, JDK 6.0 (build 1.6.0-rc-b61), Linux (Fedora Core 1), Gnome, ATI display drivers, Pentium M @ 1.6 GHz, 1 GB RAM] This is a reproducible deadlock/livelock. To reproduce: 1) JAVA_HOME=/usr/local/jdk1.6.0; export JAVA_HOME 2) ANT_OPTS="-Xmx200m -Dbuild.compiler.debug=on -Dhave-jdk-1.4 -Djdkhome=$JAVA_HOME -Djdkhome-valid=true"; export ANT_OPTS 3) go to NetBeans root source directory 4) cd nbbuild 5) rm -r testuserdir 6) ant tryme -Dnetbeans.no.pre.unscramble=true -Dtryme.args="-J-Xmx256M \ -J-Da11ytest.IDE=true -J-ea -J-Dswing.aatext=true -nosplash -fontsize 16" \ -Ddebug.port=3234 7) As soon the NetBeans main window appears (i.e. before the warm-up tasks finish), open the Java Platform Manager. 8) In the Java Platform Manager, click Add Platform... 9) In the file chooser, select j2sdk1.4.2_10 and click Next > 10) Click Finish. The mouse cursor changes to the wait cursor, the CPU keeps running at 100% and nothing happens. I will attach a full thread-dump.
Created attachment 27130 [details] full thread dump
Raised to P1 - I cannot add a platform. No workaround known. I found that this is independent of whether the warmup tasks are finished or not.
Marian, it was fixed yesterday afternoon (issue 68934), so try to update sources or download last development build.
*** This issue has been marked as a duplicate of 68934 ***
Verified.