[jira] [Created] (KAFKA-3755) tightening the offset check in ReplicaFetcherThread

["Jun Rao (JIRA)" <ji...@apache.org>]

Jun Rao created KAFKA-3755:
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             Summary: tightening the offset check in ReplicaFetcherThread
                 Key: KAFKA-3755
                 URL: https://issues.apache.org/jira/browse/KAFKA-3755
             Project: Kafka
          Issue Type: Improvement
            Reporter: Jun Rao


Currently, in ReplicaFetcherThread.processPartitionData(), we have the following code to make sure that the fetchOffset matches the log end offset.

      if (fetchOffset != replica.logEndOffset.messageOffset)
        throw new RuntimeException("Offset mismatch for partition %s: fetched offset = %d, log end offset = %d.".format(topicAndPartition, fetchOffset, replica.logEndOffset.messageOffset))

It would be useful to further assert that the first offset in the messageSet to be appended to the log is >= than the log end offset.



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