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From Nate McCall <>
Subject Re: Lot's of hints, but only on a few nodes
Date Tue, 10 May 2016 21:57:03 GMT
The most immediate work-around would be to nodetool disablehints around the
cluster before you load data. This would stop it snowballing from hints at

On Tue, May 10, 2016 at 7:49 AM, Erik Forsberg <> wrote:

> I have this situation where a few (like, 3-4 out of 84) nodes misbehave.
> Very long GC pauses, dropping out of cluster etc.
> This happens while loading data (via CQL), and analyzing metrics it looks
> like on these few nodes, a lot of hints are being generated close to the
> time when they start to misbehave.
> Since this is Cassandra 2.0.13 which have a less than optimal hints
> implementation, largs numbers of hints is a GC troublemaker.
> Again looking at metrics, it looks like hints are being generated for a
> large number of nodes, so it doesn't look like the destination nodes are at
> fault. So, I'm confused.
> Any Hints (pun intended) on what could cause a few nodes to generate more
> hints than the rest of the cluster?
> Regards,
> \EF

Nate McCall
Austin, TX

Apache Cassandra Consulting

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