[jira] [Created] (KAFKA-8570) Downconversion could fail when log contains out of order message formats

[Dhruvil Shah (JIRA)]

Dhruvil Shah created KAFKA-8570:
-----------------------------------

             Summary: Downconversion could fail when log contains out of order 
message formats
                 Key: KAFKA-8570
                 URL: https://issues.apache.org/jira/browse/KAFKA-8570
             Project: Kafka
          Issue Type: Bug
            Reporter: Dhruvil Shah
            Assignee: Dhruvil Shah


When the log contains out of order message formats (for example a v2 message 
followed by a v1 message), it is possible for down-conversion to fail in 
certain scenarios where batches compressed and greater than 1kB in size. 
Down-conversion fails with a stack like the following:

java.lang.IllegalArgumentException
at java.nio.Buffer.limit(Buffer.java:275)
at 
org.apache.kafka.common.record.FileLogInputStream$FileChannelRecordBatch.writeTo(FileLogInputStream.java:176)
at 
org.apache.kafka.common.record.AbstractRecords.downConvert(AbstractRecords.java:107)
at org.apache.kafka.common.record.FileRecords.downConvert(FileRecords.java:242)



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