[DOCS-13029] Note that arbiters will always return the previous version for FCV by design Created: 13/Sep/19  Updated: 30/Oct/23  Resolved: 17/May/22

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: Server_Docs_20231030

Type: Task Priority: Minor - P4
Reporter: Nic Cottrell Assignee: Kenneth Dyer
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Related
related to SERVER-35651 Arbiters do not track FCV changes Closed
related to DOCS-12471 Docs for SERVER-35651: Arbiters do no... Closed
Participants:
Days since reply: 1 year, 38 weeks, 1 day ago

 Description   

Description

For https://docs.mongodb.com/manual/reference/command/setFeatureCompatibilityVersion/#dbcmd.setFeatureCompatibilityVersion

 In SERVER-37049, Tess wrote:

Arbiters always have the downgrade value of FCV, regardless of the FCV of the replica set. So if the arbiter has binary version 3.6, it will always have FCV=3.4. They never learn the FCV, since they do not replicate the admin.system.version collection. Arbiters' behavior is not allowed to depend on FCV for this reason.

We should add a small section titled "Arbiters" to explain that this is expected behaviour since it can unexpected.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)



 Comments   
Comment by Githook User [ 17/May/22 ]

Author:

{'name': 'Kenneth P. J. Dyer', 'email': '93145796+kennethdyer@users.noreply.github.com', 'username': 'kennethdyer'}

Message: DOCS-13029 Backport to 4.4 (#1131)
Branch: v4.4
https://github.com/10gen/docs-mongodb-internal/commit/72c83b7dfa42c7115f3cf146ce6c70eb182c6890

Comment by Githook User [ 17/May/22 ]

Author:

{'name': 'Kenneth P. J. Dyer', 'email': '93145796+kennethdyer@users.noreply.github.com', 'username': 'kennethdyer'}

Message: DOCS-13029 Backport to v4.2 (#1134)
Branch: v4.2
https://github.com/10gen/docs-mongodb-internal/commit/2ee93463c17d4368f7330bb40d552282ff0243fd

Comment by Githook User [ 17/May/22 ]

Author:

{'name': 'Kenneth P. J. Dyer', 'email': '93145796+kennethdyer@users.noreply.github.com', 'username': 'kennethdyer'}

Message: DOCS-13029 Cherry Pick/Merge (#1130)
Branch: v5.0
https://github.com/10gen/docs-mongodb-internal/commit/d0b413107316232969fb01ee34088ec0091de581

Comment by Githook User [ 17/May/22 ]

Author:

{'name': 'Kenneth P. J. Dyer', 'email': '93145796+kennethdyer@users.noreply.github.com', 'username': 'kennethdyer'}

Message: DOCS-13029 cherry pick merge (#1126)
Branch: v5.3
https://github.com/10gen/docs-mongodb-internal/commit/0cfbd05ae5ed05f0324603b4882aa1a5e1125c92

Comment by Githook User [ 16/May/22 ]

Author:

{'name': 'Kenneth P. J. Dyer', 'email': '93145796+kennethdyer@users.noreply.github.com', 'username': 'kennethdyer'}

Message: DOCS-13029 Adds Arbiter FCV section (#1098)

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