RE: [EXTERNAL] Re: Log output when Cassandra is "up"?

["Durity, Sean R" <SE...@homedepot.com>]

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 <dv...@yahoo.com.INVALID>
Sent: Wednesday, January 8, 2020 4:12 PM
To: user@cassandra.apache.org; Voytek Jarnot <vo...@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 <vo...@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

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