[SERVER-37272] Disable hybrid index builds on FCV 4.0 Created: 21/Sep/18  Updated: 29/Oct/23  Resolved: 17/Jan/19

Status: Closed
Project: Core Server
Component/s: Storage
Affects Version/s: None
Fix Version/s: 4.1.8

Type: Task Priority: Major - P3
Reporter: Eric Milkie Assignee: Louis Williams
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Depends
Documented
is documented by DOCS-12379 Docs for SERVER-37272: Disable hybrid... Closed
Duplicate
is duplicated by SERVER-38732 Upgrade/downgrade test for hybrid ind... Closed
Backwards Compatibility: Fully Compatible
Sprint: Storage NYC 2019-01-14, Storage NYC 2019-01-28
Participants:
Linked BF Score: 25
Story Points: 5

 Description   

Because of the interaction hybrid index builds have with prepared transactions (see SERVER-38588), hybrid index builds are dependent on the two-phase behavior of simultaneous index builds, which will only be enabled in FCV 4.2. For this reason, hybrid index builds should be disabled unless a node is in FCV 4.2.



 Comments   
Comment by Githook User [ 18/Jan/19 ]

Author:

{'username': 'louiswilliams', 'email': 'louis.williams@mongodb.com', 'name': 'Louis Williams'}

Message: SERVER-37272 Raise timeouts in multiversion/hybrid_indexes
Branch: master
https://github.com/mongodb/mongo/commit/1f5753e1573df693c6cfe1ba54c1845babf67364

Comment by Githook User [ 17/Jan/19 ]

Author:

{'username': 'louiswilliams', 'email': 'louis.williams@mongodb.com', 'name': 'Louis Williams'}

Message: SERVER-37272 Disable hybrid index builds on FCV 4.0
Branch: master
https://github.com/mongodb/mongo/commit/9e87f6e272df4f97013dfccc4018efb79f68653a

Comment by Daniel Gottlieb (Inactive) [ 05/Nov/18 ]

I suspect we'll have to turnĀ a dropCollection into a dropCollectionEvenIfSystem or evaluate alternatives that are more downgrade friendly.
https://github.com/mongodb/mongo/blob/9d45349074024d19d0a5a0dedce383944e04c23b/src/mongo/db/catalog/database_impl.cpp#L339

2018-11-05T12:37:19.259-0500 W STORAGE  [initandlisten] could not drop temp collection 'local.system.indexBuild.0': IllegalOperation: can't drop system collection local.system.indexBuild.0

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