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From Hannu Kröger <hkro...@gmail.com>
Subject Re: Nodes go down periodically
Date Tue, 23 Feb 2016 14:14:53 GMT
Hi,

Those are probably GC pauses. Memory tuning is probably needed. Check the parameters that
you already have customised if they make sense.

http://blog.mikiobraun.de/2010/08/cassandra-gc-tuning.html <http://blog.mikiobraun.de/2010/08/cassandra-gc-tuning.html>

Hannu


> On 23 Feb 2016, at 16:08, Joel Samuelsson <samuelsson.joel@gmail.com> wrote:
> 
> Our nodes go down periodically, around 1-2 times each day. Downtime is from <1 second
to 30 or so seconds.
> 
> INFO [GossipTasks:1] 2016-02-22 10:05:14,896 Gossiper.java (line 992) InetAddress /109.74.13.67
<http://109.74.13.67/> is now DOWN
>  INFO [RequestResponseStage:8844] 2016-02-22 10:05:38,331 Gossiper.java (line 978) InetAddress
/109.74.13.67 <http://109.74.13.67/> is now UP
> 
> I find nothing odd in the logs around the same time. I logged a ping with timestamp and
checked during the same time and saw nothing weird (ping is less than 2ms at all times).
> 
> Does anyone have any suggestions as to why this might happen?
> 
> Best regards,
> Joel


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