RTC: Restore on failed request with compaction update#76872
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Flaky tests detected in c1b57f0. 🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/23755460819
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maxschmeling
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Co-authored-by: chriszarate <czarate@git.wordpress.org> Co-authored-by: maxschmeling <maxschmeling@git.wordpress.org>
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Co-authored-by: chriszarate <czarate@git.wordpress.org> Co-authored-by: maxschmeling <maxschmeling@git.wordpress.org>
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Co-authored-by: chriszarate <czarate@git.wordpress.org> Co-authored-by: maxschmeling <maxschmeling@git.wordpress.org>
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Gutenberg changelog: - Style Book: Fix missing styles for classic themes in stylebook route (WordPress/gutenberg#76843) - RTC: Fix stuck "Join" link in post list when lock expires (WordPress/gutenberg#76795) - Icon: Fix center alignment in the editor for classic themes (WordPress/gutenberg#76878) - RTC: Fix notes not syncing between collaborative editors (WordPress/gutenberg#76873) - Latest Comments: Fix v1 deprecated block missing supports (WordPress/gutenberg#76877) - Connectors: Add Akismet as a default connector (WordPress/gutenberg#76828) - Restore with compaction update (WordPress/gutenberg#76872) - Improve JSDoc for abilities API (WordPress/gutenberg#76824) - Connectors: Replace plugin.slug with plugin.file (WordPress/gutenberg#76909) - Block visibility badge: use canvas iframe for viewport detection (WordPress/gutenberg#76889) - Connectors: Update help text from 'reset' to 'manage' (WordPress/gutenberg#76963) - Connectors: Hide Akismet unless already installed (WordPress/gutenberg#76962) - Wrap sync update processing in try/catch (WordPress/gutenberg#76968) - Backport: Improve validation and permission checks for `WP_HTTP_Polling_Sync_Server` (WordPress/gutenberg#76987) - Connectors: account for mu-plugins when resolving plugin.file status (WordPress/gutenberg#76994)
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pento
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This updates the pinned hash from the `gutenberg` from `0d133bf7e7437d65d68a06551f3d613a7d8e4361` to `e2970ba736edb99e08fb369d4fb0c378189468ee`. The following changes are included: - WordPress/gutenberg#76478 Boot: Fix black area below content when sidebar is taller than page c… (WordPress/gutenberg#76764) - Style Book: Fix missing styles for classic themes in stylebook route (WordPress/gutenberg#76843) - RTC: Fix stuck "Join" link in post list when lock expires (WordPress/gutenberg#76795) - Icon: Fix center alignment in the editor for classic themes (WordPress/gutenberg#76878) - RTC: Fix notes not syncing between collaborative editors (WordPress/gutenberg#76873) - Latest Comments: Fix v1 deprecated block missing supports (WordPress/gutenberg#76877) - Connectors: Add Akismet as a default connector (WordPress/gutenberg#76828) - Restore with compaction update (WordPress/gutenberg#76872) - Improve JSDoc for abilities API (WordPress/gutenberg#76824) - Connectors: Replace plugin.slug with plugin.file (WordPress/gutenberg#76909) - Block visibility badge: use canvas iframe for viewport detection (WordPress/gutenberg#76889) - Connectors: Update help text from 'reset' to 'manage' (WordPress/gutenberg#76963) - Connectors: Hide Akismet unless already installed (WordPress/gutenberg#76962) - Wrap sync update processing in try/catch (WordPress/gutenberg#76968) - Backport: Improve validation and permission checks for `WP_HTTP_Polling_Sync_Server` (WordPress/gutenberg#76987) - Connectors: account for mu-plugins when resolving plugin.file status (WordPress/gutenberg#76994) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/0d133bf7e7437d65d68a06551f3d613a7d8e4361…e2970ba736edb99e08fb369d4fb0c378189468ee. Log created with: git log --reverse --format="- %s" 0d133bf7e7437d65d68a06551f3d613a7d8e4361..e2970ba736edb99e08fb369d4fb0c378189468ee | sed 's|#\([0-9][0-9]*\)|https://github.com/WordPress/gutenberg/pull/\1|g; /github\.com\/WordPress\/gutenberg\/pull/!d' | pbcopy See #64595. git-svn-id: https://develop.svn.wordpress.org/trunk@62209 602fd350-edb4-49c9-b593-d223f7449a82
markjaquith
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This updates the pinned hash from the `gutenberg` from `0d133bf7e7437d65d68a06551f3d613a7d8e4361` to `e2970ba736edb99e08fb369d4fb0c378189468ee`. The following changes are included: - WordPress/gutenberg#76478 Boot: Fix black area below content when sidebar is taller than page c… (WordPress/gutenberg#76764) - Style Book: Fix missing styles for classic themes in stylebook route (WordPress/gutenberg#76843) - RTC: Fix stuck "Join" link in post list when lock expires (WordPress/gutenberg#76795) - Icon: Fix center alignment in the editor for classic themes (WordPress/gutenberg#76878) - RTC: Fix notes not syncing between collaborative editors (WordPress/gutenberg#76873) - Latest Comments: Fix v1 deprecated block missing supports (WordPress/gutenberg#76877) - Connectors: Add Akismet as a default connector (WordPress/gutenberg#76828) - Restore with compaction update (WordPress/gutenberg#76872) - Improve JSDoc for abilities API (WordPress/gutenberg#76824) - Connectors: Replace plugin.slug with plugin.file (WordPress/gutenberg#76909) - Block visibility badge: use canvas iframe for viewport detection (WordPress/gutenberg#76889) - Connectors: Update help text from 'reset' to 'manage' (WordPress/gutenberg#76963) - Connectors: Hide Akismet unless already installed (WordPress/gutenberg#76962) - Wrap sync update processing in try/catch (WordPress/gutenberg#76968) - Backport: Improve validation and permission checks for `WP_HTTP_Polling_Sync_Server` (WordPress/gutenberg#76987) - Connectors: account for mu-plugins when resolving plugin.file status (WordPress/gutenberg#76994) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/0d133bf7e7437d65d68a06551f3d613a7d8e4361…e2970ba736edb99e08fb369d4fb0c378189468ee. Log created with: git log --reverse --format="- %s" 0d133bf7e7437d65d68a06551f3d613a7d8e4361..e2970ba736edb99e08fb369d4fb0c378189468ee | sed 's|#\([0-9][0-9]*\)|https://github.com/WordPress/gutenberg/pull/\1|g; /github\.com\/WordPress\/gutenberg\/pull/!d' | pbcopy See #64595. Built from https://develop.svn.wordpress.org/trunk@62209 git-svn-id: http://core.svn.wordpress.org/trunk@61489 1a063a9b-81f0-0310-95a4-ce76da25c4cd
pento
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This updates the pinned hash from the `gutenberg` from `0d133bf7e7437d65d68a06551f3d613a7d8e4361` to `e2970ba736edb99e08fb369d4fb0c378189468ee`. The following changes are included: - WordPress/gutenberg#76478 Boot: Fix black area below content when sidebar is taller than page c… (WordPress/gutenberg#76764) - Style Book: Fix missing styles for classic themes in stylebook route (WordPress/gutenberg#76843) - RTC: Fix stuck "Join" link in post list when lock expires (WordPress/gutenberg#76795) - Icon: Fix center alignment in the editor for classic themes (WordPress/gutenberg#76878) - RTC: Fix notes not syncing between collaborative editors (WordPress/gutenberg#76873) - Latest Comments: Fix v1 deprecated block missing supports (WordPress/gutenberg#76877) - Connectors: Add Akismet as a default connector (WordPress/gutenberg#76828) - Restore with compaction update (WordPress/gutenberg#76872) - Improve JSDoc for abilities API (WordPress/gutenberg#76824) - Connectors: Replace plugin.slug with plugin.file (WordPress/gutenberg#76909) - Block visibility badge: use canvas iframe for viewport detection (WordPress/gutenberg#76889) - Connectors: Update help text from 'reset' to 'manage' (WordPress/gutenberg#76963) - Connectors: Hide Akismet unless already installed (WordPress/gutenberg#76962) - Wrap sync update processing in try/catch (WordPress/gutenberg#76968) - Backport: Improve validation and permission checks for `WP_HTTP_Polling_Sync_Server` (WordPress/gutenberg#76987) - Connectors: account for mu-plugins when resolving plugin.file status (WordPress/gutenberg#76994) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/0d133bf7e7437d65d68a06551f3d613a7d8e4361…e2970ba736edb99e08fb369d4fb0c378189468ee. Log created with: git log --reverse --format="- %s" 0d133bf7e7437d65d68a06551f3d613a7d8e4361..e2970ba736edb99e08fb369d4fb0c378189468ee | sed 's|#\([0-9][0-9]*\)|https://github.com/WordPress/gutenberg/pull/\1|g; /github\.com\/WordPress\/gutenberg\/pull/!d' | pbcopy See #64595. git-svn-id: https://develop.svn.wordpress.org/branches/7.0@62212 602fd350-edb4-49c9-b593-d223f7449a82
markjaquith
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Apr 6, 2026
This updates the pinned hash from the `gutenberg` from `0d133bf7e7437d65d68a06551f3d613a7d8e4361` to `e2970ba736edb99e08fb369d4fb0c378189468ee`. The following changes are included: - WordPress/gutenberg#76478 Boot: Fix black area below content when sidebar is taller than page c… (WordPress/gutenberg#76764) - Style Book: Fix missing styles for classic themes in stylebook route (WordPress/gutenberg#76843) - RTC: Fix stuck "Join" link in post list when lock expires (WordPress/gutenberg#76795) - Icon: Fix center alignment in the editor for classic themes (WordPress/gutenberg#76878) - RTC: Fix notes not syncing between collaborative editors (WordPress/gutenberg#76873) - Latest Comments: Fix v1 deprecated block missing supports (WordPress/gutenberg#76877) - Connectors: Add Akismet as a default connector (WordPress/gutenberg#76828) - Restore with compaction update (WordPress/gutenberg#76872) - Improve JSDoc for abilities API (WordPress/gutenberg#76824) - Connectors: Replace plugin.slug with plugin.file (WordPress/gutenberg#76909) - Block visibility badge: use canvas iframe for viewport detection (WordPress/gutenberg#76889) - Connectors: Update help text from 'reset' to 'manage' (WordPress/gutenberg#76963) - Connectors: Hide Akismet unless already installed (WordPress/gutenberg#76962) - Wrap sync update processing in try/catch (WordPress/gutenberg#76968) - Backport: Improve validation and permission checks for `WP_HTTP_Polling_Sync_Server` (WordPress/gutenberg#76987) - Connectors: account for mu-plugins when resolving plugin.file status (WordPress/gutenberg#76994) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/0d133bf7e7437d65d68a06551f3d613a7d8e4361…e2970ba736edb99e08fb369d4fb0c378189468ee. Log created with: git log --reverse --format="- %s" 0d133bf7e7437d65d68a06551f3d613a7d8e4361..e2970ba736edb99e08fb369d4fb0c378189468ee | sed 's|#\([0-9][0-9]*\)|https://github.com/WordPress/gutenberg/pull/\1|g; /github\.com\/WordPress\/gutenberg\/pull/!d' | pbcopy See #64595. Built from https://develop.svn.wordpress.org/branches/7.0@62212 git-svn-id: http://core.svn.wordpress.org/branches/7.0@61492 1a063a9b-81f0-0310-95a4-ce76da25c4cd
adamsilverstein
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Co-authored-by: chriszarate <czarate@git.wordpress.org> Co-authored-by: maxschmeling <maxschmeling@git.wordpress.org>
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What?
When an RTC polling request fails, convert queued updates into a compaction update instead of replaying them.
Why?
In at least one instance, we have observed a cascading failure that results in thousands of duplicate updates, eventually resulting in OOM errors. This appears to happen when the server request fails after it successfully writes the provided updates—either because of an unknown code failure or because of a timeout or other transport issue.
When this happens, the client detects the failure and restores the updates to the queue. The exact same updates are then sent on the following poll request.
If this pattern repeats, updates are continuously duplicated leading to unbounded growth of sync data and eventual OOM errors.
How?
Instead of blindly replaying updates on failure, we must accept the possibility that the updates were successful.
This PR replaces the queue
restore()strategy with compaction: instead of re-sending the updates, the client encodes its full document state as a single compaction update and clears the queue. This is safe because:When
endCursoris still0(no successful poll yet), we fall back torestore()since the queue only contains the initialsync_step1update and there’s no meaningful document state to compact. Additionally, compaction updates require anendCursorso that they target existing updates.In theory, it's still possible for this issue to manifest on the very first poll request that contains updates, but the risk should be dramatically reduced.