Github user tdas commented on a diff in the pull request:

    https://github.com/apache/spark/pull/17219#discussion_r106798566
  
    --- Diff: 
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamExecution.scala
 ---
    @@ -419,14 +441,44 @@ class StreamExecution(
                 SQLConf.SHUFFLE_PARTITIONS.key, 
shufflePartitionsToUse.toString)
             }
     
    -        logDebug(s"Found possibly unprocessed offsets $availableOffsets " +
    -          s"at batch timestamp ${offsetSeqMetadata.batchTimestampMs}")
    +        offsetLog.get(latestBatchId - 1).foreach { lastOffsets =>
    +          committedOffsets = lastOffsets.toStreamProgress(sources)
    --- End diff --
    
    add a comment on what you are trying to do here. also if this is part of 
the `// First assume that we are re-executing the latest batch in the offset 
log` then might as well move this up there if possible.


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