cmccabe commented on a change in pull request #8737:
URL: https://github.com/apache/kafka/pull/8737#discussion_r432159364



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File path: core/src/main/scala/kafka/admin/TopicCommand.scala
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@@ -290,6 +295,8 @@ object TopicCommand extends Logging {
 
     override def describeTopic(opts: TopicCommandOptions): Unit = {
       val topics = getTopics(opts.topic, opts.excludeInternalTopics)
+      ensureTopicExists(topics, opts.topic, !opts.ifExists)

Review comment:
       Same issue here as above.  You can get past this line this way, but you 
still fail when actually calling `describeTopics`.
   
   Another issue with this code is that we should not be listing all partition 
reassignments.  `Admin#listPartitionReassignments` has a variant that takes a 
list of partitions.  We should use that so that we're not fetching a lot of 
information that we don't need.  I think this should be an easy fix




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