Ah, this got me on the right track.  I've switched the 'hostname' command for 'hostname -f', redeployed the CSD jar and it works now.   I think I'm a bit confused about how this works then.  CM deploys a fresh config, it supplies the principal name to this initialisation script (presumably it's got the right one, as CM is aware of the keytabs it's distributing).  That principal is regexed to remove the hostname and replace it with the template value of _HOST.  Accumulo starts and replaces _HOST with the principal again.   I guess the problem here is that 'hostname' returns an unqualified hostname whereas CM knows the server running the service by is FQDN.   Maybe I'm missing something, but it seems like all the switching of hostnames an template values is what's causing the problem here.   Thanks for pointing me in the right direction. ... View more