NullPointerException when running nodetool stopdaemon

I am trying to use `nodetool stopdaemon` to stop Cassandra but hitting the following error: ``` $ cassandra_ctl nodetool -h 127.0.0.1 -p 5100 stopdaemon error: null -- StackTrace -- java.lang.NullPointerException at org.apache.cassandra.config.DatabaseDescriptor.getDiskFailurePolicy(DatabaseDescri

Aborting a decommission

Hi! I was wondering if it is possible to abort/cancel a decommission that was initiated with `nodetool decommission`. The use case I am interested in is being able to stop a decommission that is in progress (returning the host to UN state) so that I can deal with another DN node first, without pe