[jira] [Created] (KAFKA-20322) TransactionMarkerChannelManager has discoverBrokerVersions=false causing UnsupportedVersionException during rolling upgrades

[Ritika Reddy (Jira)]

Ritika Reddy created KAFKA-20322:
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             Summary: TransactionMarkerChannelManager has 
discoverBrokerVersions=false causing UnsupportedVersionException during rolling 
upgrades
                 Key: KAFKA-20322
                 URL: https://issues.apache.org/jira/browse/KAFKA-20322
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 4.2.0
            Reporter: Ritika Reddy
            Assignee: Ritika Reddy
             Fix For: 4.2.1


AFFECTED CODE: origin/trunk: 
core/src/main/scala/kafka/coordinator/transaction/TransactionMarkerChannelManager.scala

ROOT CAUSE: TransactionMarkerChannelManager creates NetworkClient with 
discoverBrokerVersions=false, which disables API version discovery. Without 
version discovery, NetworkClient blindly uses the latest API version for all 
requests.



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