[jira] [Created] (CASSANDRA-14129) BatchStatement (LOGGED BATCH) fails: Not enough replica available for query at consistency ONE (1 required but only 0 alive)

["Erik Scheuter (JIRA)" <ji...@apache.org>]

Erik Scheuter created CASSANDRA-14129:
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             Summary: BatchStatement (LOGGED BATCH) fails: Not enough replica available for query at consistency ONE (1 required but only 0 alive)
                 Key: CASSANDRA-14129
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14129
             Project: Cassandra
          Issue Type: Bug
            Reporter: Erik Scheuter


In our test-cluster I get the error "Not enough replica available for query at consistency ONE (1 required but only 0 alive)" when 1 node is down and a BatchStatement is used. By default it uses LOGGED BATCHES and DCAwareRoundRobinPolicy.
We have 2 DC's, 4 nodes and a RF 2:2. Write Consistency of QUORUM (*not* LOCAL QUORUM).

I noticed as soon as the driver marked the LocalDC containing the one with the node down, this error occurs. If the other DC is marked as the LocalDC, everything works as expected.

The issue https://issues.apache.org/jira/browse/CASSANDRA-7870 points to the comment from Olivier Michallat at [StackOverflow|https://stackoverflow.com/questions/26015282/cassandra-not-enough-replica-available-java-driver-behaviour-different-from-c]:
_This batch log must be replicated to at least one replica other than the coordinator, otherwise that would defeat the above mechanism._

I think it needs an other replica in the same DC.

These constraints can lead to downtime, so I expect them to find in the documentation (and a more detailed error message).

Used:
Cassandra 2.0.17
Datastax-driver 3.3.0



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