We've had a very similar issue, but haven't been able to figure out what 
the problem is. How do you "fix" the problem? Will a node restart fix the 
problem immediately or do you need to restart the whole machine? 

On Tuesday, July 29, 2014 1:59:52 PM UTC-7, [email protected] wrote:
>
> Hey guys,
>
> We've been running a 5 node cluster for our index (5 shards, 1 replica, 
> evenly distributed on 5 nodes), and are running into a problem with one of 
> the nodes in the cluster. It is not unique to any specific node, and can 
> happen sporadically on any of the nodes.
>
> One of the machines starts spiking up close to 100% CPU Load, and close to 
> 8 OS Load (which is amusing, considering there are only 4 CPU cores on the 
> machine), while all the other machines operate normally way below those 
> figures. Naturally, this behavior is accompanied by extremely high write 
> times, and read times, as well.
>
> Here's what Marvel looks like:
>
>
> <https://lh5.googleusercontent.com/-bxUFPhqAnVk/U9gKg4c19nI/AAAAAAAAABE/S_w68vZ63Uo/s1600/Marvel+-+Node+Statistics.png>
>
> Here's all the information we could gather:
>
>    - Full thread dump from while this occurred: 
>    https://gist.github.com/danielschonfeld/ff6c3744197f2c748632
>    - GET _nodes/stats: 
>    https://gist.github.com/schonfeld/693c8dbf0dd57e4cff7c
>    - GET _nodes/hot_threads: 
>    https://gist.github.com/schonfeld/766d771d211e452a7100
>    - GET _cluster/stats: 
>    https://gist.github.com/schonfeld/d5395f97e3a87745cc1f
>    
>
> Thoughts? insights? Any clues would be greatly appreciated. 
>

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