I use a script that calls nodetool info. If nodetool info returns an error (instance isn’t up, on the way up, etc.) then I return that same error code (and I know the node is NOT OK). If nodetool info succeeds, I then parse the output for each protocol to be up. A node can be up, but have gossip or cql down/unavailable. That node is also NOT OK.
If all this passes, then the node is OK. I would love if there was something simpler, like the Informix onstat - | grep “On-line” … Sean Durity From: Deepak Vohra <dvohr...@yahoo.com.INVALID> Sent: Wednesday, January 8, 2020 4:12 PM To: user@cassandra.apache.org; Voytek Jarnot <voytek.jar...@gmail.com> Subject: [EXTERNAL] Re: Log output when Cassandra is "up"? Use the nodetool status command. nodetool status Datacenter: us-east-1 ===================== Status=Up/Down|/ State=Normal/Leaving/Joining/Moving-- Address Load Tokens Owns (effective) Host ID Rack UN 10.0.1.115 205.6 KiB 256 66.9% b64cb32a-b32a-46b4-9eeb-e123fa8fc287 us-east-1b UN 10.0.3.206 182.67 KiB 256 63.5% 74863177-684b-45f4-99f7-d1006625dc9e us-east-1d UN 10.0.2.238 240.81 KiB 256 69.6% 4dcdadd2-41f9-4f34-9892-1f20868b27c7 us-east-1c UN in 1st column implies status is Up and Normal. On Wednesday, January 8, 2020, 08:37:42 p.m. UTC, Voytek Jarnot <voytek.jar...@gmail.com<mailto:voytek.jar...@gmail.com>> wrote: Needing to know when Cassandra is finished initializing and is up & running. Had some scripts which were looking through system.log for "No gossip backlog; proceeding", but that turns out not to be 100% reliable. Is looking for "Starting listening for CQL clients" considered definitive? I.E., always gets output on success, and not on failure? Thanks ________________________________ The information in this Internet Email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this Email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this Email are subject to the terms and conditions expressed in any applicable governing The Home Depot terms of business or client engagement letter. The Home Depot disclaims all responsibility and liability for the accuracy and content of this attachment and for any damages or losses arising from any inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other items of a destructive nature, which may be contained in this attachment and shall not be liable for direct, indirect, consequential or special damages in connection with this e-mail message or its attachment.
