That most likely happened just because after scrub you had new files and got over the "4" file minimum limit.
https://issues.apache.org/jira/browse/CASSANDRA-2697 Is the bug report. 2011/6/13 Héctor Izquierdo Seliva <izquie...@strands.com> > Hi All. I found a way to be able to compact. I have to call scrub on > the column family. Then scrub gets stuck forever. I restart the node, > and voila! I can compact again without any message about not having > enough space. This looks like a bug to me. What info would be needed to > fill a report? This is on 0.8 updating from 0.7.5 > > >
