[SERVER-83265] Avoid blocking FCV transitions while shard is serving shardCollection requests Created: 15/Nov/23  Updated: 30/Nov/23  Resolved: 30/Nov/23

Status: Closed
Project: Core Server
Component/s: Sharding
Affects Version/s: 7.1.0, 7.2.0-rc3
Fix Version/s: None

Type: Bug Priority: Major - P3
Reporter: Pierlauro Sciarelli Assignee: Pierlauro Sciarelli
Resolution: Works as Designed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Problem/Incident
is caused by SERVER-79052 Add a new version of the create colle... Closed
Assigned Teams:
Catalog and Routing
Operating System: ALL
Participants:

 Description   

Starting from v7.1.0 (SERVER-79052), the _shardsvrCreateCollection command keeps in scope a fixed FixedFCVRegion for the whole duration of the operation, releasing it only when the coordinator completes.

This could be problematic because no FCV transition is allowed on shards serving a shardCollection request.



 Comments   
Comment by Pierlauro Sciarelli [ 30/Nov/23 ]

Closing because I had misread the scopes: the fixed fcv region is released right after creating (or getting) the coordinator

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