It looks like you only have 2 replicas configured in each data center? If so, LOCAL_QUORUM cannot be achieved with a host down same as with QUORUM on RF=2 in a single DC cluster.
On Fri, Sep 2, 2011 at 1:40 PM, Oleg Tsvinev <oleg.tsvi...@gmail.com> wrote: > 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. >
