HDInsight Known Issues
Summary of known issues for this release specific to HDInsight. This release has the following known issues.
|Bug ID||Apache JIRA||Apache component||Summary|
Description of the problem or behavior
We strongly discourage downgrading from Kafka 2.1.0 to earlier versions. Though Ambari allows you to downgrade to earlier versions of Kafka after you upgrade to 2.1.0, consider the following before you do so.
If you upgrade both the broker and consumer to 2.1.0, a downgrade might cause data loss.
If you upgrade the broker to 2.1.0 and the consumer remains at 2.0.0, then you can downgrade the broker to 2.0.0 without any issue.