I've recently upgraded our Cassandra cluster from 2.1 to 3.9. By default(?)
3.9 creates a debug.log file containing a ton of lines (a new one every
second) with:

DEBUG [GossipTasks:1] 2016-10-12 14:43:38,761 Gossiper.java:337 -
> Convicting / with status hibernate - alive false

That node has not been around for a very long time now.

It does not show up in nodetool status and nodetool gossipinfo returns the
following output about that node:

>   generation:1433571405
>   heartbeat:232
>   STATUS:3:hibernate,true
>   LOAD:225:96445.0
>   SCHEMA:53:e2d1a288-581c-3f35-b492-1b9d5a803631
>   DC:9:us-east
>   RACK:11:1b
>   SEVERITY:231:0.2512562870979309
>   HOST_ID:5:7988d3c9-dec8-4b71-b5a9-0b962aad0680
>   TOKENS:2:<hidden>

nodetool removenode 7988d3c9-dec8-4b71-b5a9-0b962aad0680 resulted in:

error: Host ID not found.

Now my questions are:

   1. What does it mean for a node to be "hibernating"? How does it end up
   in that state?
   2. How do I get rid of it? Its not coming back.

Best regards,
Kasper Middelboe Petersen

*Lead Backend Developer*

*SYBO Games ApS*
Jorcks Passage 1A, 4th.
1162 Copenhagen K

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