Jean-Daniel Cryans <jdcry...@...> writes: > We can kill -9 region servers as much as we > want, and the cluster does recover. > > J-D
Just FYI: I've just tested the redundancy of region servers on a Hadoop 0.20.2/HBase 0.20.6, with 2 region servers. The results are: it works fine, only if the region to be killed doesn't contain ROOT and META regions. In the opposite case, i.e. if the killed region contained the ROOT, cluster is not operable after killing it (org.apache.hadoop.hbase.NotServingRegionException: -ROOT-,,0). Neither after the killed region server has been brought up again. Both reads and writes failed. As result, per my tests, the region servers are not redundant in 0.20.6. Andrey
