This has been a random but reoccuring issue, most recently caused with initialize trafodion,upgrade. Hbase gets into a state where initialize trafodion,drop will not work. One workaround is sometimes going to the hbase shell and doing disable_all "." and drop_all "." will clean things up and allow initialzie trafodion to work so the cluster is usable. However, sometimes even those commands don't work and just hang.
This might be an instability in HBase itself or something that Trafodion is causing to happen. It is very worrisome if a customer gets into this situation that they won't be able to recover from.
We have seen this enough to justify entering a bug for it so people are aware.