Hello Jeff,

Sorry the Version I am using 2.1.16, my first email had typo.
When I say schema out of sync

1. nodetool descriebcluster shows Schema versions same for all nodes.
2. nodetool removenode, shows the node down messages in the logs
3. nodetool describecluster during this 1-2 mins shows several nodes as
UNREACHABLE and recovers with in a minute or two.

On Thu, Jun 29, 2017 at 12:51 PM, Jeff Jirsa <jji...@apache.org> wrote:

>
> 2.1.16 is old, but it's not as old as 2.1.6, which is what you originally
> put, and would be much more concerning.
>
> It is true, however, that 'removenode' involves streaming data, and
> streaming data can be GC intensive (especially with compression enabled),
> which means if your cluster is on the edge of health you may cause it to
> teeter over the edge during streaming, causing nodes to flap (the DOWN
> messages in the logs). That doesn't really explain the schema change,
> though - how confident are you that the schema was properly in sync prior
> to the removenode?
>
> - Jeff
>
> On 2017-06-29 09:49 (-0700), Jai Bheemsen Rao Dhanwada <
> jaibheem...@gmail.com> wrote:
> > Hello Jeff,
> >
> > Yes 2.1.16 is old version, and we are planning to upgrade in few months.
> >
> > Only the gossiper info is logged stating that it marked several nodes
> down
> > and nothing else.
> >
> >
>
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