srowen commented on a change in pull request #24890: [SPARK-28074][SS] Log warn message on possible correctness issue for multiple stateful operations in single query URL: https://github.com/apache/spark/pull/24890#discussion_r329128895
########## File path: docs/structured-streaming-programming-guide.md ########## @@ -1647,6 +1647,27 @@ For example, sorting on the input stream is not supported, as it requires keepin track of all the data received in the stream. This is therefore fundamentally hard to execute efficiently. +### Limitation of global watermark + +In some circumstance, some stateful operations could emit rows older than current watermark (with allowed delay), Review comment: "In some circumstances, if a stateful operation emits rows ..." Is it clearer to say something like "the current watermark plus allowed late record delay"? uses global -> uses a global and these -> , then these could bring -> can cause a ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
