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Type: Improvement
Resolution: Fixed
Priority: Major - P3
Fix Version/s: 4.8.0
Affects Version/s: None
Component/s: None
Labels:
None

Backwards Compatibility:
Fully Compatible
Sprint:
Execution Team 2020-09-21, Execution Team 2020-10-05
Linked BF Score:
23

When a read on a secondary uses kLastApplied/kNoOverlap and encounters a collection catalog conflict, it uses a trick to reacquire the PBWM lock and read without a timestamp.

This was necessary because single-phase background index builds would timestamp writes at future timestamps that may never be seen on secondaries (i.e. "ghost timestamps"). This is not necessary now that simultaneous index builds are the only index builds in 4.5+.

is depended on by

SERVER-38341 Remove Parallel Batch Writer Mutex

Closed

is duplicated by

SERVER-49285 Support getMore on snapshot cursor even after unrelated index is created or dropped

Closed

is related to

SERVER-48518 Rollback via refetch (EMRC = false) can make readers to see the rolled back data even after the rollback node catches up to primary.

Closed

SERVER-49285 Support getMore on snapshot cursor even after unrelated index is created or dropped

Closed

related to

SERVER-67538 Multi-doc transactions should fail if on an old, incompatible snapshot

Closed

SERVER-51703 index_secondary_wait_for_commit.js - IndexBuildTest.assertIndexes() sees different server state from IndexBuildTest.getIndexBuildOpId()

Closed

(1 related to)

Assignee:: Louis Williams

Reporter:: Louis Williams

Participants:: Githook User, Louis Williams

Votes:: 0 Vote for this issue

Watchers:: 6 Start watching this issue

Created:: Apr 30 2020 09:11:42 PM UTC

Updated:: Oct 29 2023 10:08:51 PM UTC

Resolved:: Sep 23 2020 05:07:20 PM UTC

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