Hey Mitch, The security upgrade schedule that your colleague is working on may well be relevant. Is your entire cluster on 3.11.6 or are the failing hosts possibly on a newer version?
Abe > On Feb 26, 2023, at 10:38, Mitch Gitman <mgit...@gmail.com> wrote: > > > We're running Cassandra 3.11.6 on AWS EC2 instances. These clusters have been > running for a few years. > > We're suddenly noticing now that on one of our clusters the nodetool command > is failing on certain nodes but not on others. > > The failure: > nodetool: Failed to connect to '...:7199' - SecurityException: 'Access > denied! Invalid access level for requested MBeanServer operation.'. > > I suspect that this stems from some colleague I'm not in coordination with > recently doing some security upgrades, but that's a bit of an academic matter > for now. > > I've compared the jmxremote.access and jvm.options files on a host where > nodetool is not working vs. a host where nodetool is working, and no > meaningful differences. > > Any ideas? The interesting aspect of this problem is that it is occurring on > some nodes in the one cluster but not others. > > I'll update on this thread if I find any solutions on my end.
