Joe Ammann created SPARK-28094: ---------------------------------- Summary: Multiple left joins or aggregations in one query produce incorrect results Key: SPARK-28094 URL: https://issues.apache.org/jira/browse/SPARK-28094 Project: Spark Issue Type: Bug Components: Structured Streaming Affects Versions: 2.4.3 Reporter: Joe Ammann
Structured streaming queries which involve more than one non-map-like transformations (either left joins or aggregations) produce incorrect (and sometimes inconsistent) results. I have put up a sample here as Gist https://gist.github.com/jammann/b58bfbe0f4374b89ecea63c1e32c8f17 The test case involves 4 topics, and I've implement 6 different use cases of which 3 fail to produce the expected results 1) A innerjoin B: to topic A_B expected: 10 inner joined messages observation: OK 2) A innerjoin B outerjoin C: to topic A_B_outer_C expected: 9 inner joined messages, last one in watermark observation: OK 3) A innerjoin B outerjoin C outerjoin D: to topic A_B_outer_C_outer_D expected: 9 inner/outer joined messages, 3 match C, 1 match D, last one in watermark observation: NOK, only 3 messages are produced, where the C outer join matches 4) B outerjoin C: to topic B_outer_C expected: 9 outer joined messages, 3 match C, 1 match D, last one in watermark observation: NOK, same as 3 5) A innerjoin B agg on field of A: to topic A_inner_B_agg expected: 3 groups with a total of 9 inner joined messages, last one in watermark observation: OK 6) A innerjoin B outerjoin C agg on field of A: to topic A_inner_B_outer_C_agg expected: 3 groups with a total of 9 inner joined messages, last one in watermark observation: NOK, 3 groups with 1 message each, where C outer join matches -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org