[jira] [Created] (KAFKA-8306) Ensure consistency of checkpointed log start offset and current log end offset

["Jason Gustafson (JIRA)" <ji...@apache.org>]

Jason Gustafson created KAFKA-8306:
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             Summary: Ensure consistency of checkpointed log start offset and current log end offset
                 Key: KAFKA-8306
                 URL: https://issues.apache.org/jira/browse/KAFKA-8306
             Project: Kafka
          Issue Type: Bug
            Reporter: Jason Gustafson


When initializing a log, we may use the checkpointed log start offset. We need to ensure that the log end offset is set consistently with this value (i.e. it must be greater than or equal to it). This may not always be true if the log data is removed or has become corrupted. As a simple experiment, you can try the following steps to reproduce the problem:
 # Write some data to the partition
 # Use DeleteRecords to advance log start
 # Shutdown the broker
 # Delete the log directory
 # Restart the broker

You will see something like this in the logs:
{code:java}
[2019-04-29 11:55:21,259] INFO [Log partition=foo-0, dir=/tmp/kafka-logs] Completed load of log with 1 segments, log start offset 10 and log end offset 0 in 36 ms (kafka.log.Log){code}

This may be the cause of KAFKA-8255, but I am not sure yet.



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