[SERVER-78203] Validate compound wildcard indexes with downgraded FCV in createIndex command Created: 19/Jun/23  Updated: 29/Oct/23  Resolved: 21/Jun/23

Status: Closed
Project: Core Server
Component/s: None
Affects Version/s: None
Fix Version/s: 7.0.0-rc5, 7.0.0-rc6

Type: Bug Priority: Major - P3
Reporter: Ruoxin Xu Assignee: Ruoxin Xu
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Backports
Depends
Backwards Compatibility: Fully Compatible
Operating System: ALL
Backport Requested:
v7.0
Sprint: QO 2023-06-26
Participants:
Linked BF Score: 129

 Description   

Currently a mongod fails to startup if there exists any compound wildcard index and the FCV is downgraded below 7.0. We should only ban any new creation of a CWI if FCV < 7.0 but allow CWI's continued use and mongod should start successfully.

 

Historically, if FCV is downgraded, we choose to fail a start of a mongod with the existence of a new index type in the collection. In order to help customer get out of the situation that the mongod server cannot be restarted after FCV is downgraded and a CWI is not removed, we should still allow the index creation on start up even if FCV < 7.0. Only starting a mongod with the binary version < 7.0 should fail.



 Comments   
Comment by Githook User [ 21/Jun/23 ]

Author:

{'name': 'Ruoxin Xu', 'email': 'ruoxin.xu@mongodb.com', 'username': 'RuoxinXu'}

Message: SERVER-78203 Validate compound wildcard indexes with downgraded FCV in createIndex command

(cherry picked from commit aaf8464c54244781177f57f341f59a324bac39ca)
Branch: v7.0
https://github.com/mongodb/mongo/commit/44255eef76696962159ad1fd7af03ce70abc474d

Comment by Githook User [ 21/Jun/23 ]

Author:

{'name': 'Ruoxin Xu', 'email': 'ruoxin.xu@mongodb.com', 'username': 'RuoxinXu'}

Message: SERVER-78203 Validate compound wildcard indexes with downgraded FCV in createIndex command
Branch: master
https://github.com/mongodb/mongo/commit/aaf8464c54244781177f57f341f59a324bac39ca

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