[GitHub] spark pull request #20946: [SPARK-23565] [SQL] New error message for structu...

[xuanyuanking <gi...@git.apache.org>]

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

    https://github.com/apache/spark/pull/20946#discussion_r183447816
  
    --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/OffsetSeq.scala ---
    @@ -39,7 +39,9 @@ case class OffsetSeq(offsets: Seq[Option[Offset]], metadata: Option[OffsetSeqMet
        * cannot be serialized).
        */
       def toStreamProgress(sources: Seq[BaseStreamingSource]): StreamProgress = {
    -    assert(sources.size == offsets.size)
    +    assert(sources.size == offsets.size, s"There are [${offsets.size}] sources in the " +
    +      s"checkpoint offsets and now there are [${sources.size}] sources requested by the query.  " +
    --- End diff --
    
    nit: extra blank in the end


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