[SERVER-39415] Regression testing for a 4.2 binary in FCV 4.0 Created: 07/Feb/19  Updated: 27/Oct/23  Resolved: 27/Apr/20

Status: Closed
Project: Core Server
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Improvement Priority: Major - P3
Reporter: Louis Williams Assignee: Backlog - Storage Execution Team
Resolution: Gone away Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Assigned Teams:
Storage Execution
Participants:

 Description   

All of our tests run MongoDB in FCV 4.2, with the exception of our multiversion tests, which test predictable update/downgrade paths. We have a notable lack of comprehensive regression testing for when a binary is in FCV 4.0.

One possibility would be to run the compatible jstests from our 4.0 branch against a 4.2 mongod in FCV 4.0 to observe regressions.

Another option could simply be a passthrough or fuzzer suite that runs continuous upgrades/downgrades.


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