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From Eric Stevens <migh...@gmail.com>
Subject Re: Doubt regarding consistency-level in Cassandra-2.1.10
Date Mon, 02 Nov 2015 16:54:18 GMT
Serial consistency gets invoked at the protocol level when doing
lightweight transactions such as CAS operations.  If you're expecting that
your topology is RF=2, N=2, it seems like some keyspace has RF=3, and so
there aren't enough nodes available to satisfy serial consistency.

See
http://docs.datastax.com/en/cassandra/2.0/cassandra/dml/dml_ltwt_transaction_c.html

On Mon, Nov 2, 2015 at 1:29 AM Ajay Garg <ajaygargnsit@gmail.com> wrote:

> Hi All.
>
> I have a 2*2 Network-Topology Replication setup, and I run my application
> via DataStax-driver.
>
> I frequently get the errors of type ::
> *Cassandra timeout during write query at consistency SERIAL (3 replica
> were required but only 0 acknowledged the write)*
>
> I have already tried passing a "write-options with LOCAL_QUORUM
> consistency-level" in all create/save statements, but I still get this
> error.
>
> Does something else need to be changed in /etc/cassandra/cassandra.yaml
> too?
> Or may be some another place?
>
>
> --
> Regards,
> Ajay
>

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