[SERVER-46858] [4.2] Start WT in read only mode if the 'recoverToOplogTimestamp' flag is missing for queryable backup Created: 13/Mar/20  Updated: 29/Oct/23  Resolved: 17/Mar/20

Status: Closed
Project: Core Server
Component/s: Storage
Affects Version/s: 4.2.4
Fix Version/s: 4.2.5

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

Issue Links:
Related
Backwards Compatibility: Fully Compatible
Operating System: ALL
Sprint: Execution Team 2020-03-23
Participants:

 Description   

This only affects 4.2.4 binaries running with FCV 4.0. With FCV 4.0, we don't use WiredTiger checkpoints for backups. But when we start-up with queryable backup mode, WiredTiger will use the callbacks for the writeable API implemented in 4.2.4 when it shouldn't.

 

On 4.2.4 binaries with FCV 4.0, the recommended workaround is to add these options to the config:

  • storage.wiredTiger.engineConfig.configString: ",readonly=true,"
  • storage.journal.enabled: false


 Comments   
Comment by Githook User [ 17/Mar/20 ]

Author:

{'name': 'Gregory Wlodarek', 'email': 'gregory.wlodarek@mongodb.com', 'username': 'GWlodarek'}

Message: SERVER-46858 Start WT in read only mode if the 'recoverToOplogTimestamp' flag is missing for queryable backup
Branch: v4.2
https://github.com/mongodb/mongo/commit/06ec8a65d702e013c8dd70795d29342b1198cd15

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