Release Graceful Shutdown of Cassandra · Netflix/Priam

New Features

(#664) Cassandra Process Manager can be configured to gracefully stop using the new
gracefulDrainHealthWaitSeconds option. If this option set to a positive integer (>=0) then before calling
the shutdown script, Priam will fail healthchecks (InstanceState.isHealthy) for the configured number of seconds and then will issue a nodetool drain with 30s timeout (since drain can hang), and finally call the provided stop script. By default this is set to -1 to disable this feature for backwards compatibility. This is useful if you want to gracefully drain cassandra clients off a node before running drain (which kills the Native/Thrift server and resets and tcp connections that were established; in flight requests can get dropped), then running drain to safely stop Cassandra, and then call your stop script. If your service discovery system does not integrate with Priam's health system or your stop script already does all these things then leave this functionality disabled.
(#664) /v1/cassadmin/stop http API call now takes an optional force parameter (e.g. /v1/cassadmin/stop?force=true which will skip the graceful path for that particular stop; default value is false.
(#650) Enable auth on the jmx port via jmxUsername and jmxPassword options. By default these are null and not provided.

(#664) If you previously implemented ICassandraProcess internally the start method has been refactored to take a boolean force parameter. If you implement this interface you can supply false to preserve previous behavior.