[DOCS-12085] Docs for SERVER-35656: Ensure a 4.0 mongos crashes upon attempting to connect to an FCV 4.2 cluster Created: 27/Sep/18  Updated: 13/Nov/23  Resolved: 08/Nov/18

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: 4.1.1, Server_Docs_20231030, Server_Docs_20231106, Server_Docs_20231105, Server_Docs_20231113

Type: Task Priority: Major - P3
Reporter: Kay Kim (Inactive) Assignee: Kay Kim (Inactive)
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Documented
documents SERVER-35656 Ensure a 4.0 mongos crashes upon atte... Closed
Participants:
Days since reply: 5 years, 13 weeks, 6 days ago
Epic Link: DOCS: 4.2 Server/Tools

 Description   

Description

Description:

Document the changed behavior in adding a 4.0 mongos to a 4.2 cluster

Engineering Ticket Description:

As part of SERVER-32635, a last-stable binary version mongos will crash upon attempting to connect to a latest featureCompatibilityVersion cluster. However, since this behavior was added for 4.0 mongos and FCV 4.2 was not present at the time, some special testing behavior was necessary to simulate a 4.0 mongos crashing. As part of the 4.2 upgrade/downgrade work, the crash_mongos_against_upgraded_cluster.js test should be updated to no longer rely on these failpoints and just directly use a 4.0 mongos and FCV 4.2 cluster. The failpoints/wireVersion added as part of SERVER-32635 solely for simulation of the crash should also be removed.

Scope of changes

  • Add note to:
    • mongos ref and conceptual pages
    • sharded cluster update page
  • the 4.0 version already mentions the fcv/mongos in 4.0 compatibility:
    • for now, won't add to 4.0 mongos ref and conceptual pages

Impact to Other Docs

MVP (Work and Date)

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



 Comments   
Comment by Githook User [ 08/Nov/18 ]

Author:

{'name': 'kay', 'email': 'kay.kim@10gen.com', 'username': 'kay-kim'}

Message: DOCS-12085: mongos and fcv
Branch: master
https://github.com/mongodb/docs/commit/599d70af865b14dfa631a5dfc649fdbb81a1e2b0

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