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After switch to JDK 7 nbms-and-javadoc freezes on invoke "ant -Dcluster.config=experimental build-nbms". I guess it caused by building NBM of o.jython.distro.netbeans. Reproducible by invoke: ant -f o.jython.distro.netbeans/build.xml nbm on contrib repo. http://deadlock.netbeans.org/hudson/view/Disabled/job/nbms-and-javadoc/10625/console I suggest to remove jython modules from experimental suite until the problem resolved.
Jarda takes care of this. Thanks Jarda
Fixed the MakeNBM task: ergonomics#50aa8b394765