Getting Cassandra timeout during read query at consistency LOCAL_ONE while decommissioning a node

Question

I have a cassandra cluster of 10 machines with a replication factor of 3 on a keyspace .

I decommissioned a node using nodetool decommission command but it resulted in read failures with error Cassandra timeout during read query at consistency LOCAL_ONE while decommissioning a node

This shouldn't happen because replication factor is 3 so at least one of those three nodes should have responded even if rebalancing is being done .

Any reason why this can happen

Answer 1

When decommissioning a node or adding a node Actual consistency is considered to be +1. This is explained here .