T Jake Luciani created CASSANDRA-9895:
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Summary: Batchlog RF>1 writes to a single node but not itself.
Key: CASSANDRA-9895
URL: https://issues.apache.org/jira/browse/CASSANDRA-9895
Project: Cassandra
Issue Type: Bug
Reporter: T Jake Luciani
In the batchlogmanager when selecting the endpoints for to write the batchlog
to, for RF>1, we filter out any down nodes and the local node.
This means we require two nodes up but only write to one. Why? This affects
availability since we need two nodes to write at CL.ONE.
If we *require* two copies of the batchlog then we should include ourselfs in
the calculation.
If we allow a batchlog write with only a single node up then we should write to
the local batchlog.
The code is here:
https://github.com/apache/cassandra/blob/1c80b04be1d47d03bbde888cea960f5ff8a95d58/src/java/org/apache/cassandra/db/BatchlogManager.java#L530
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