feat(replay): Populate trace_ids in mobile replay events by antonis · Pull Request #6786 · getsentry/sentry-react-native

antonis · 2026-09-25T08:46:19Z

📢 Type of change

Bugfix
New feature
Enhancement
Refactoring

📜 Description

The mobileReplayIntegration now forwards the trace id of each sent event to the native Session Replay, so the current segment carries it under trace_ids. This makes React Native mobile replays discoverable when searching by trace id in Explore, matching web replay and the native SDKs.

Implementation is a thin forward across the JS↔native bridge:

JS — a new afterSendEvent step reads event.contexts.trace.trace_id and forwards it via a new NATIVE.registerReplayTraceId(traceId) seam. Only forwards while a replay is recording (guarded by the cached replay id); the collection logic lives in a small replay/replayTraceIds.ts module.
Bridge — additive registerReplayTraceId(traceId: string): void on the RNSentry TurboModule spec. Degrades to a no-op on older cached native binaries (typeof guard).
iOS — SentrySDK.internal.replay.registerTraceId(SentryId) via RNSentryInternal, converting the 32-char hex trace id to a SentryId (reusing the hyphenation helper shared with setCurrentScopePropagationContext).
Android — getReplayController().registerTraceId(new SentryId(traceId)).

💡 Motivation and Context

Fixes #6232

💚 How did you test it?

Added tests
Manual testing (example searches)

📝 Checklist

I added tests to verify changes.
No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
I updated the docs if needed.
I updated the wizard if needed.
All tests passing.
Public API changes reviewed by another Mobile SDK team member or implemented according to the develop docs spec.
No breaking changes.

🔮 Next steps

Forward the trace id of each sent event to the native Session Replay so the current segment carries it under `trace_ids`, making replays searchable by trace id in Explore. The native SDKs (Cocoa 9.29.1, Java 8.58.0) own dedup, the 100-per-segment cap, and the no-op when no replay is recording; the RN side is a thin forward across the bridge. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

github-actions · 2026-09-25T08:46:38Z

Semver Impact of This PR

⚪ None (no version bump detected)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

feat(replay): Populate trace_ids in mobile replay events by antonis in #6786

chore(deps): update Cocoa SDK to v9.29.1 by github-actions in #6785
chore(deps): update Android SDK to v8.58.0 by github-actions in #6778
fix(build): Prevent update-android.sh from failing on SIGPIPE by antonis in #6777
chore(deps): update Wizard to v8.0.0 by github-actions in #6775

_{🤖 This preview updates automatically when you update the PR.}

github-actions · 2026-09-25T08:46:56Z

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

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github-actions · 2026-09-25T08:57:32Z

Android (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	478.78 ms	540.71 ms	61.94 ms
Size	50.56 MiB	56.51 MiB	5.95 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
`5789645`+dirty	426.82 ms	495.42 ms	68.60 ms
`fa21fca`+dirty	453.80 ms	468.46 ms	14.66 ms
`a216cb9`+dirty	458.66 ms	531.47 ms	72.81 ms
`0307fa4`+dirty	454.16 ms	518.35 ms	64.18 ms
`5569641`+dirty	406.43 ms	428.51 ms	22.08 ms
`6a3eb4c`+dirty	430.90 ms	489.98 ms	59.08 ms
`5fe1c6c`+dirty	401.62 ms	445.28 ms	43.66 ms
`a636fa4`+dirty	486.70 ms	508.53 ms	21.83 ms
`15d4514`+dirty	406.77 ms	428.06 ms	21.29 ms
`1e5d96d`+dirty	519.43 ms	543.62 ms	24.19 ms

App size

Revision	Plain	With Sentry	Diff
`5789645`+dirty	49.74 MiB	54.85 MiB	5.11 MiB
`fa21fca`+dirty	49.74 MiB	55.37 MiB	5.63 MiB
`a216cb9`+dirty	49.74 MiB	55.08 MiB	5.34 MiB
`0307fa4`+dirty	49.74 MiB	54.81 MiB	5.07 MiB
`5569641`+dirty	48.30 MiB	53.48 MiB	5.18 MiB
`6a3eb4c`+dirty	49.74 MiB	55.44 MiB	5.70 MiB
`5fe1c6c`+dirty	43.75 MiB	48.14 MiB	4.39 MiB
`a636fa4`+dirty	49.74 MiB	55.36 MiB	5.62 MiB
`15d4514`+dirty	48.30 MiB	53.60 MiB	5.30 MiB
`1e5d96d`+dirty	49.74 MiB	54.81 MiB	5.07 MiB

sentry · 2026-09-25T09:00:17Z

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
Sentry RN	io.sentry.reactnative.sample	8.28.0 (108)	Release

⚙️ sentry-react-native Build Distribution Settings

github-actions · 2026-09-25T09:01:25Z

iOS (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	3827.18 ms	1209.38 ms	-2617.79 ms
Size	5.15 MiB	6.92 MiB	1.77 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
`64630e5`+dirty	3842.70 ms	1218.11 ms	-2624.60 ms
`b0d3373`+dirty	3831.75 ms	1227.29 ms	-2604.46 ms
`b04af96`+dirty	3818.92 ms	1219.76 ms	-2599.16 ms
`3d31fcf`+dirty	3838.09 ms	1223.46 ms	-2614.63 ms
`a0a3177`+dirty	3844.73 ms	1225.23 ms	-2619.51 ms
`af33f3b`+dirty	3849.98 ms	1236.45 ms	-2613.53 ms
`09a902f`+dirty	3835.67 ms	1217.11 ms	-2618.57 ms
`5a316ea`+dirty	3820.11 ms	1211.28 ms	-2608.83 ms
`acd838e`+dirty	3849.78 ms	1230.00 ms	-2619.78 ms
`c2e182c`+dirty	3848.40 ms	1211.79 ms	-2636.61 ms

App size

Revision	Plain	With Sentry	Diff
`64630e5`+dirty	4.98 MiB	6.46 MiB	1.49 MiB
`b0d3373`+dirty	5.15 MiB	6.68 MiB	1.53 MiB
`b04af96`+dirty	4.98 MiB	6.54 MiB	1.56 MiB
`3d31fcf`+dirty	4.98 MiB	6.56 MiB	1.58 MiB
`a0a3177`+dirty	4.98 MiB	6.55 MiB	1.58 MiB
`af33f3b`+dirty	4.98 MiB	6.51 MiB	1.54 MiB
`09a902f`+dirty	4.98 MiB	6.46 MiB	1.49 MiB
`5a316ea`+dirty	4.98 MiB	6.51 MiB	1.53 MiB
`acd838e`+dirty	5.15 MiB	6.70 MiB	1.55 MiB
`c2e182c`+dirty	4.98 MiB	6.50 MiB	1.52 MiB

github-actions · 2026-09-25T09:16:55Z

Android (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	480.17 ms	513.91 ms	33.74 ms
Size	50.56 MiB	56.51 MiB	5.95 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
`bf168a4`+dirty	430.60 ms	459.31 ms	28.71 ms
`0bd8916`+dirty	400.15 ms	442.72 ms	42.57 ms
`a2585ce`+dirty	414.04 ms	456.83 ms	42.79 ms
`9c84b9a`+dirty	429.26 ms	448.90 ms	19.64 ms
`bc0d8cf`+dirty	407.66 ms	461.35 ms	53.69 ms
`a736b76`+dirty	405.78 ms	458.74 ms	52.96 ms
`1122a96`+dirty	510.16 ms	542.00 ms	31.84 ms
`267d3ed`+dirty	424.69 ms	483.70 ms	59.01 ms
`6177334`+dirty	404.80 ms	456.74 ms	51.94 ms
`7887847`+dirty	420.47 ms	460.55 ms	40.08 ms

App size

Revision	Plain	With Sentry	Diff
`bf168a4`+dirty	49.74 MiB	55.09 MiB	5.35 MiB
`0bd8916`+dirty	48.30 MiB	53.57 MiB	5.26 MiB
`a2585ce`+dirty	49.74 MiB	55.36 MiB	5.61 MiB
`9c84b9a`+dirty	49.74 MiB	55.36 MiB	5.62 MiB
`bc0d8cf`+dirty	48.30 MiB	53.48 MiB	5.18 MiB
`a736b76`+dirty	48.30 MiB	53.48 MiB	5.18 MiB
`1122a96`+dirty	48.30 MiB	53.54 MiB	5.24 MiB
`267d3ed`+dirty	48.30 MiB	53.58 MiB	5.28 MiB
`6177334`+dirty	48.30 MiB	53.54 MiB	5.23 MiB
`7887847`+dirty	49.74 MiB	54.81 MiB	5.07 MiB

github-actions · 2026-09-25T09:17:02Z

iOS (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	3841.00 ms	1228.87 ms	-2612.13 ms
Size	5.15 MiB	6.92 MiB	1.77 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
`64630e5`+dirty	3845.49 ms	1215.19 ms	-2630.30 ms
`b0d3373`+dirty	3842.49 ms	1218.49 ms	-2624.00 ms
`b04af96`+dirty	3830.54 ms	1206.11 ms	-2624.44 ms
`f9c1ed4`+dirty	3842.09 ms	1220.70 ms	-2621.40 ms
`09a902f`+dirty	3847.65 ms	1221.31 ms	-2626.34 ms
`44abcc2`+dirty	3841.42 ms	1214.77 ms	-2626.65 ms
`acd838e`+dirty	3835.94 ms	1215.87 ms	-2620.07 ms
`bfba737`+dirty	3834.18 ms	1222.80 ms	-2611.38 ms
`ce7b368`+dirty	3851.41 ms	1222.37 ms	-2629.04 ms
`4e0ba9c`+dirty	3856.39 ms	1234.44 ms	-2621.95 ms

App size

Revision	Plain	With Sentry	Diff
`64630e5`+dirty	4.98 MiB	6.46 MiB	1.49 MiB
`b0d3373`+dirty	5.15 MiB	6.68 MiB	1.53 MiB
`b04af96`+dirty	4.98 MiB	6.54 MiB	1.56 MiB
`f9c1ed4`+dirty	4.98 MiB	6.50 MiB	1.53 MiB
`09a902f`+dirty	4.98 MiB	6.46 MiB	1.49 MiB
`44abcc2`+dirty	4.98 MiB	6.55 MiB	1.57 MiB
`acd838e`+dirty	5.15 MiB	6.70 MiB	1.55 MiB
`bfba737`+dirty	4.98 MiB	6.51 MiB	1.53 MiB
`ce7b368`+dirty	4.98 MiB	6.51 MiB	1.53 MiB
`4e0ba9c`+dirty	5.15 MiB	6.67 MiB	1.51 MiB

alwx

Looks good!

#6786 added registerReplayTraceId on main while this branch was moving the .mm callers off the Swift module. git merged both cleanly, but the result calls RNSentryInternal directly from RNSentry.mm, which no longer imports the generated Swift header -- breaking every iOS build, CocoaPods included. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

antonis added the ready-to-merge Triggers the full CI test suite label Sep 25, 2026

cursor Bot reviewed Sep 25, 2026

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antonis marked this pull request as ready for review September 25, 2026 09:18

antonis requested review from alwx and lucas-zimerman as code owners September 25, 2026 09:18

alwx approved these changes Sep 25, 2026

View reviewed changes

antonis merged commit 570d7be into main Sep 25, 2026
141 of 147 checks passed

antonis deleted the feat/replay-trace-ids branch September 25, 2026 10:57

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📢 Type of change

📜 Description

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

🔮 Next steps

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github-actions Bot commented Sep 25, 2026

Semver Impact of This PR

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github-actions Bot commented Sep 25, 2026

Android (legacy) Performance metrics 🚀

Baseline results on branch: main

Startup times

App size

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sentry Bot commented Sep 25, 2026

📲 Install Builds

Android

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github-actions Bot commented Sep 25, 2026

iOS (legacy) Performance metrics 🚀

Baseline results on branch: main

Startup times

App size

Uh oh!

github-actions Bot commented Sep 25, 2026

Android (new) Performance metrics 🚀

Baseline results on branch: main

Startup times

App size

Uh oh!

github-actions Bot commented Sep 25, 2026

iOS (new) Performance metrics 🚀

Baseline results on branch: main

Startup times

App size

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antonis commented Sep 25, 2026 •

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