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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