[jira] [Created] (KAFKA-14456) Fix AdminUtils startIndex for rack aware partition creations

["Andrew Grant (Jira)" <ji...@apache.org>]

Andrew Grant created KAFKA-14456:
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             Summary: Fix AdminUtils startIndex for rack aware partition creations 
                 Key: KAFKA-14456
                 URL: https://issues.apache.org/jira/browse/KAFKA-14456
             Project: Kafka
          Issue Type: Improvement
            Reporter: Andrew Grant


When new partitions are added/created we calculate a start index based off all the brokers here [https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/zk/AdminZkClient.scala#L270.] That start index is passed through to AdminUtils and is used to find a starting position in the list of brokers for making assignments. However, when we make rack aware assignments we use that index into a rack alternating list here [https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/admin/AdminUtils.scala#L160.] The meaning of the index gets lost: the index into the full list of brokers doesnt seem to have the same meaning as the index into a rack alternating list. 

 

I discovered this when I published [https://github.com/apache/kafka/pull/12943/files.] In that PR I added a test testRackAwarePartitionAssignment which does not work for ZK mode.



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