[jira] [Created] (KAFKA-8534) retention.bytes does not work as documented

["Evelyn Bayes (JIRA)" <ji...@apache.org>]

Evelyn Bayes created KAFKA-8534:
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             Summary: retention.bytes does not work as documented
                 Key: KAFKA-8534
                 URL: https://issues.apache.org/jira/browse/KAFKA-8534
             Project: Kafka
          Issue Type: Bug
          Components: log cleaner
    Affects Versions: 2.2.1, 2.1.1, 2.0.1, 1.1.1, 1.0.2, 0.11.0.3
            Reporter: Evelyn Bayes


A log segment isn't deleted when a partition reaches retention.bytes.

Instead a log segment is deleted when a partition reaches retention.bytes + segment.bytes

This conflicts with the defenition of retention.bytes:
*_This configuration controls the maximum size a partition (which consists of log segments) can grow to before we will discard old log segments to free up space if we are using the "delete" retention policy. By default there is no size limit only a time limit. Since this limit is enforced at the partition level, multiply it by the number of partitions to compute the topic retention in bytes._*



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