gaborgsomogyi commented on a change in pull request #29729:
URL: https://github.com/apache/spark/pull/29729#discussion_r489215473



##########
File path: 
external/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/KafkaOffsetReader.scala
##########
@@ -105,34 +109,16 @@ private[kafka010] class KafkaOffsetReader(
     minPartitions.map(_ > numTopicPartitions).getOrElse(false)
   }
 
-  private def nextGroupId(): String = {
-    groupId = driverGroupIdPrefix + "-" + nextId
-    nextId += 1
-    groupId
-  }
-
   override def toString(): String = consumerStrategy.toString
 
   /**
    * Closes the connection to Kafka, and cleans up state.
    */
   def close(): Unit = {
-    if (_consumer != null) uninterruptibleThreadRunner.runUninterruptibly { 
stopConsumer() }
+    if (_admin != null) uninterruptibleThreadRunner.runUninterruptibly { 
stopAdmin() }
     uninterruptibleThreadRunner.shutdown()
   }
 
-  /**
-   * @return The Set of TopicPartitions for a given topic
-   */
-  def fetchTopicPartitions(): Set[TopicPartition] = 
uninterruptibleThreadRunner.runUninterruptibly {
-    assert(Thread.currentThread().isInstanceOf[UninterruptibleThread])

Review comment:
       My rationale related removing here vs removing in separate PR is the 
following: I personally don't see a reason why the removal could cause any 
issues but to be defensive we can put it into a separate PR. This way if any 
issue appears for mystical reason we can rollback that PR independently. Does 
this make sense?




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