[jira] [Created] (KAFKA-9763) Recent changes to Connect's InsertField will fail to inject field on key of tombstone record

["Randall Hauch (Jira)" <ji...@apache.org>]

Randall Hauch created KAFKA-9763:
------------------------------------

             Summary: Recent changes to Connect's InsertField will fail to inject field on key of tombstone record
                 Key: KAFKA-9763
                 URL: https://issues.apache.org/jira/browse/KAFKA-9763
             Project: Kafka
          Issue Type: Bug
          Components: KafkaConnect
    Affects Versions: 2.3.1, 2.4.0, 2.2.2, 1.0.3, 1.1.2, 2.0.2, 2.1.2, 2.5.0
            Reporter: Randall Hauch
            Assignee: Randall Hauch
             Fix For: 1.0.3, 1.1.2, 2.0.2, 2.1.2, 2.2.3, 2.3.2, 2.4.2, 2.5.1


This is a regression due to the changes for KAFKA-8523.

KAFKA-8523 was backported to multiple versions, and was released into 2.2.2, 2.3.1, and 2.4.0, and will soon be released in 2.5.0.

Unfortunately, that fix always makes the `InsertField` SMT skip all tombstone records, even when using the `InsertField$Key`.

Rather than:
{code:java}
    private boolean isTombstoneRecord(R record) {
        return record.value() == null;
    }
{code}
the correct behavior would be:
{code:java}
     private boolean isTombstoneRecord(R record) {
         return operatingValue(record) == null;
     }
{code}
The method no longer detects just tombstone methods, so the code should be refactored to return the record if the operatingValue for the record (which for `InsertField$Key` is the record key and for `InsertField$Value` is the record value) is null.

 



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