Add Cosmos hedging diagnostics - #5198

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Ashley Stanton-Nurse (analogrelay) wants to merge 27 commits into

Azure:mainfrom

analogrelay:ashleyst/cosmos-hedge-obs

Commits on Sep 1, 2026

Add Cosmos hedging detection API to driver

authored and
Ashley Stanton-Nurse (analogrelay)
committed
5acb86f
Surface hedging through Cosmos observability handlers

authored and
Ashley Stanton-Nurse (analogrelay)
committed
45d50f0
Fix hedge-race region attribution + observability consistency

authored and
Ashley Stanton-Nurse (analogrelay)
committed
008e257
Make hedge observability surfaces consistent for both-transient→failover

authored and
Ashley Stanton-Nurse (analogrelay)
committed
00aa9ce
Fix broken links in hedging detection API spec

authored and
Ashley Stanton-Nurse (analogrelay)
committed
c08c2fa
Documentation cleanups from round-3 review

authored and
Ashley Stanton-Nurse (analogrelay)
committed
ed9f0da
Align hedge_diagnostics() docstring with hedging_started()

authored and
Ashley Stanton-Nurse (analogrelay)
committed
409186a
Report hedge fan-out consistently across observability

authored and
Ashley Stanton-Nurse (analogrelay)
committed
e216200
Fix broken intra-doc link in metrics handler

authored and
Ashley Stanton-Nurse (analogrelay)
committed
d49b4b6
Add fanouts and undercount to cosmos cspell dictionary

authored and
Ashley Stanton-Nurse (analogrelay)
committed
27241ac
bound materialized hedge region histories

authored and
Ashley Stanton-Nurse (analogrelay)
committed
a5d07b4
Preserve hedge-loser diagnostics and true dispatch order

authored and
Ashley Stanton-Nurse (analogrelay)
committed
4cde769
Stop using deprecated ExecutionContext::Retry in tests

Copilot
authored and
Ashley Stanton-Nurse (analogrelay)
committed
cc4825c
fix(cosmos): define SDK-owned RequestedRegion types

authored and
Ashley Stanton-Nurse (analogrelay)
committed
98dc2b1
Remove ExecutionContext::Retry and collapse RequestedRegionReason into ExecutionContext

authored and
Ashley Stanton-Nurse (analogrelay)
committed
5f141f0
Remove issue links from spec and CHANGELOG

authored and
Ashley Stanton-Nurse (analogrelay)
committed
29d578f
Resolve PR #4871 merge conflicts

Nalu Tripician
authored and
Ashley Stanton-Nurse (analogrelay)
committed
1524ae3
Drop workflow-file deltas from merge

Nalu Tripician
authored and
Ashley Stanton-Nurse (analogrelay)
committed
549073c
Build hedged counter in Instruments::new

authored and
Ashley Stanton-Nurse (analogrelay)
committed
d9221a8
Use US spelling of finalization in region docs

authored and
Ashley Stanton-Nurse (analogrelay)
committed
2d3166d
Remove unrelated workflow changes

Nalu Tripician
authored and
Ashley Stanton-Nurse (analogrelay)
committed
11b7c63
Fix Cosmos rebase fallout
Ashley Stanton-Nurse (analogrelay)
committed
9680fa7
Clean up rebased Cosmos metrics
Ashley Stanton-Nurse (analogrelay)
committed
b30468d
Remove duplicate Cosmos test attribute
Ashley Stanton-Nurse (analogrelay)
committed
4a0adb5
Clean up Cosmos changelog entries
Ashley Stanton-Nurse (analogrelay)
committed
59c1fbd
Simplify Cosmos changelog notes
Ashley Stanton-Nurse (analogrelay)
committed
35946c1
Fix rebased Cosmos emulator tests
Ashley Stanton-Nurse (analogrelay)
committed
33089f7

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Add Cosmos hedging diagnostics - #5198

Add Cosmos hedging diagnostics#5198
Ashley Stanton-Nurse (analogrelay) wants to merge 27 commits into
Azure:mainfrom
analogrelay:ashleyst/cosmos-hedge-obs

Commits on Sep 1, 2026

Add Cosmos hedging detection API to driver

Surface hedging through Cosmos observability handlers

Fix hedge-race region attribution + observability consistency

Make hedge observability surfaces consistent for both-transient→failover

Fix broken links in hedging detection API spec

Documentation cleanups from round-3 review

Align hedge_diagnostics() docstring with hedging_started()

Report hedge fan-out consistently across observability

Fix broken intra-doc link in metrics handler

Add fanouts and undercount to cosmos cspell dictionary

bound materialized hedge region histories

Preserve hedge-loser diagnostics and true dispatch order

Stop using deprecated ExecutionContext::Retry in tests

fix(cosmos): define SDK-owned RequestedRegion types

Remove ExecutionContext::Retry and collapse RequestedRegionReason into ExecutionContext

Remove issue links from spec and CHANGELOG

Resolve PR #4871 merge conflicts

Drop workflow-file deltas from merge

Build hedged counter in Instruments::new

Use US spelling of finalization in region docs

Remove unrelated workflow changes

Fix Cosmos rebase fallout

Clean up rebased Cosmos metrics

Remove duplicate Cosmos test attribute

Clean up Cosmos changelog entries

Simplify Cosmos changelog notes

Fix rebased Cosmos emulator tests