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From Romain Hardouin <>
Subject Re: unreachable nodes mystery in describecluster output
Date Wed, 03 Aug 2016 13:38:53 GMT
That's a good news if describecluster shows the same version on each node. Try with a high
timeout like 120 seconds to see if it works. Is there a VPN between DCs? Is there room for
improvement at the network level? TCP tuning, etc. I'm not saying you won't have unreachable
nodes but it's worth it if you can.
    Le Mercredi 3 août 2016 15h02, Aleksandr Ivanov <> a écrit :

The latency is high...
It is but is it really causing the problem? Latency is high but constant and not higher than

Regarding the ALTER, did you try to increase the timeout with "cqlsh --request-timeout=REQUEST_TIMEOUT"?
Because the default is 10 seconds.

I use 25sec timeout (--request-timeout 25)

 Apart the unreachable nodes, do you know if all nodes have the same schema version? 
"nodetool gossipinfo" shows same scheme version on all nodes.


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