[DOCS-15626] Investigate changes in SERVER-67363: $indexStats aggregations seem to increment the top counter twice Created: 13/Sep/22  Updated: 13/Nov/23  Resolved: 13/Sep/22

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: 6.2.0-rc0, Server_Docs_20231030, Server_Docs_20231106, Server_Docs_20231105, Server_Docs_20231113

Type: Task Priority: Major - P3
Reporter: Backlog - Core Eng Program Management Team Assignee: Unassigned
Resolution: Works as Designed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Documented
documents SERVER-67363 $indexStats aggregations seem to incr... Closed
Participants:
Days since reply: 1 year, 21 weeks, 1 day ago
Epic Link: DOCSP-22091

 Description   
Original Downstream Change Summary

Fixed the bug when all aggregations with stage $indexStats incremented Top counters "readLock" and "commands" twice instead of only once.

Description of Linked Ticket

This addition to jstests/core/top.js seems to cause it to fail:

diff --git a/jstests/core/top.js b/jstests/core/top.js
index 20630f274c9..490865442e5 100644
--- a/jstests/core/top.js
+++ b/jstests/core/top.js
@@ -125,11 +125,19 @@ for (i = 0; i < numRecords; i++) {
 }
 lastTop = assertTopDiffEq(testColl, lastTop, "commands", numRecords);
 
+// aggregate
+assert.eq(0, testColl.aggregate([]).itcount());  // All records were just deleted.
+lastTop = assertTopDiffEq(testColl, lastTop, "commands", 1);
+
 // getIndexes
 assert.eq(1, testColl.getIndexes().length);
 assertTopDiffEq(testColl, lastTop, "commands", 1);
 lastTop = assertTopDiffEq(testColl, lastTop, "readLock", 1);
 
+// aggregate with $indexStats
+assert.eq(1, testColl.aggregate([{$indexStats: {}}]).itcount());
+lastTop = assertTopDiffEq(testColl, lastTop, "commands", 1);
+
 // createIndex

Specifically, that last assertion fails since "commands" is incremented by 2 instead of 1.



 Comments   
Comment by Jeffrey Allen [ 13/Sep/22 ]

I don't think this bug was ever mentioned in the docs. I'm going to close this out, but will reopen if we come across any mentions of this behavior in the docs.

Comment by Education Bot [ 13/Sep/22 ]

Fix Version updated for upstream SERVER-67363:
6.2.0-rc0

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