Joshua McKenzie created CASSANDRA-8949:
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             Summary: CompressedSequentialWriter.resetAndTruncate can lose data
                 Key: CASSANDRA-8949
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8949
             Project: Cassandra
          Issue Type: Bug
            Reporter: Joshua McKenzie
            Assignee: Joshua McKenzie
            Priority: Critical
             Fix For: 2.0.13, 2.1.4


If the FileMark passed into this method fully fills the buffer, a subsequent 
call to write will reBuffer and drop the data currently in the buffer. We need 
to mark the buffer contents as dirty in resetAndTruncate to prevent this - see 
CASSANDRA-8709 notes for details.



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