[GitHub] [spark] HeartSaVioR commented on a change in pull request #27755: [SPARK-31004][WEBUI][SS] Show message for empty Streaming Queries instead of empty timelines and histograms.

[GitBox <gi...@apache.org>]

HeartSaVioR commented on a change in pull request #27755: [SPARK-31004][WEBUI][SS] Show message for empty Streaming Queries instead of empty timelines and histograms.
URL: https://github.com/apache/spark/pull/27755#discussion_r386222495
 
 

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 File path: sql/core/src/main/scala/org/apache/spark/sql/streaming/ui/StreamingQueryStatisticsPage.scala
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 @@ -264,7 +265,12 @@ private[ui] class StreamingQueryStatisticsPage(parent: StreamingQueryTab)
           </tr>
         </tbody>
       </table>
-    // scalastyle:on
+    } else {
+      <div id="empty-streaming-query-message">
+        <b>No visualization information available because there is no batch.</b>
 
 Review comment:
   `there is no batch` - this might be slightly misleading if the query was running with some batches and stopped, and restarted with checkpoint. I can't think of good alternative though as of now...

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