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From Philippe <watche...@gmail.com>
Subject Re: frequent node UP/Down?
Date Sun, 25 Sep 2011 07:29:07 GMT
I have this happening on 0.8.x It looks to me as this happens when the node
is under heavy load such as unthrottled compactions or a huge GC.

2011/9/24 Yang <teddyyyy123@gmail.com>

> I'm using 1.0.0
>
>
> there seems to be too many node Up/Dead events detected by the failure
> detector.
> I'm using  a 2 node cluster on EC2, in the same region, same security
> group, so I assume the message drop
> rate should be fairly low.
> but in about every 5 minutes, I'm seeing some node detected as down,
> and then Up again quickly, like the following
>
>
>  INFO 20:30:12,726 InetAddress /10.71.111.222 is now dead.
>  INFO 20:30:32,154 InetAddress /10.71.111.222 is now UP
>
>
> does the "1 in every 5 minutes" sound roughly right for your setup? I
> just want to make sure the unresponsiveness is not
> caused by something like memtable flushing, or GC, which I can
> probably further tune.
>
>
> Thanks
> Yang
>

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