We run Cassandra 2.1.13 and since last few days we're seeing below in logs
occasionally. The node then becomes unresponsive to cqlsh.
ERROR [SharedPool-Worker-2] 2017-11-08 17:02:32,362 CommitLogSegment.java:441 -
Attempted to write commit log entry for unrecognized column family:
The column family has heavy writes, but it hasn't changed schema / load wise
recently. How can this be troubleshooted / fixed ?