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From Oleg Tsvinev <oleg.tsvi...@gmail.com>
Subject HUnavailableException: : May not be enough replicas present to handle consistency level.
Date Fri, 02 Sep 2011 18:40:22 GMT
I believe I don't quite understand semantics of this exception:

me.prettyprint.hector.api.exceptions.HUnavailableException: : May not
be enough replicas present to handle consistency level.

Does it mean there *might be* enough?
Does it mean there *is not* enough?

My case is as following - I have 3 nodes with keyspaces configured as following:

Replication Strategy: org.apache.cassandra.locator.NetworkTopologyStrategy
Durable Writes: true
Options: [DC2:2, DC1:2]

Hector can only connect to nodes in DC1 and configured to neither see
nor connect to nodes in DC2. This is for replication by Cassandra
means, asynchronously between datacenters DC1 and DC2. Each of 6 total
nodes can see any of the remaining 5.

and inserts with LOCAL_QUORUM CL work fine when all 3 nodes are up.
However, this morning one node went down and I started seeing the
HUnavailableException: : May not be enough replicas present to handle
consistency level.

I believed if I have 3 nodes and one goes down, two remaining nodes
are sufficient for my configuration.

Please help me to understand what's going on.

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