Skip slot cache optimization for AOF client to prevent key duplication and data corruption#3004
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murphyjacob4 merged 1 commit intoJan 10, 2026
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…cation (valkey-io#2995) Signed-off-by: aditya.teltia <teltia.aditya22@gmail.com>
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## unstable #3004 +/- ##
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- Coverage 74.27% 74.15% -0.12%
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Files 129 129
Lines 70896 70896
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- Hits 52656 52573 -83
- Misses 18240 18323 +83
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enjoy-binbin
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LGTM, thanks for the fix.
enjoy-binbin
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Jan 6, 2026
enjoy-binbin
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For the purpose of understanding the impact, I think the only way to get a cross-slot MULTI/EXEC in the AOF is:
But yeah definitely a bug. Good find! |
Contributor
Sorry, read through the issue again. It looks like the issue is also occurring with a same-slot MULTI/EXEC. It is basically using the slot of the previous command execution. So yeah - not just cross-slot MULTI/EXEC |
murphyjacob4
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…n and data corruption (valkey-io#3004) When loading AOF in cluster mode, keys inside a MULTI/EXEC block could be inserted into wrong hash slots, causing key duplication and data corruption. The root cause was the slot caching optimization in getKeySlot(). This optimization reuses a cached slot value to avoid recalculating the hash for every key operation. However, when replaying AOF, a transaction may contain commands affecting keys in different slots. The cached slot from a previous command (e.g., SET k1) would incorrectly be used for subsequent commands in the transaction (e.g., SET k0), causing k0 to be stored in k1's slot. The existing code already skipped this optimization for replicated clients (commands from primary) using isReplicatedClient(). This change extends that to also skip for AOF clients by using mustObeyClient() instead, which covers both replicated clients and the AOF client. Fixes valkey-io#2995, introduced in valkey-io#1949. Signed-off-by: aditya.teltia <teltia.aditya22@gmail.com>
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…n and data corruption (valkey-io#3004) When loading AOF in cluster mode, keys inside a MULTI/EXEC block could be inserted into wrong hash slots, causing key duplication and data corruption. The root cause was the slot caching optimization in getKeySlot(). This optimization reuses a cached slot value to avoid recalculating the hash for every key operation. However, when replaying AOF, a transaction may contain commands affecting keys in different slots. The cached slot from a previous command (e.g., SET k1) would incorrectly be used for subsequent commands in the transaction (e.g., SET k0), causing k0 to be stored in k1's slot. The existing code already skipped this optimization for replicated clients (commands from primary) using isReplicatedClient(). This change extends that to also skip for AOF clients by using mustObeyClient() instead, which covers both replicated clients and the AOF client. Fixes valkey-io#2995, introduced in valkey-io#1949. Signed-off-by: aditya.teltia <teltia.aditya22@gmail.com>
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…n and data corruption (#3004) When loading AOF in cluster mode, keys inside a MULTI/EXEC block could be inserted into wrong hash slots, causing key duplication and data corruption. The root cause was the slot caching optimization in getKeySlot(). This optimization reuses a cached slot value to avoid recalculating the hash for every key operation. However, when replaying AOF, a transaction may contain commands affecting keys in different slots. The cached slot from a previous command (e.g., SET k1) would incorrectly be used for subsequent commands in the transaction (e.g., SET k0), causing k0 to be stored in k1's slot. The existing code already skipped this optimization for replicated clients (commands from primary) using isReplicatedClient(). This change extends that to also skip for AOF clients by using mustObeyClient() instead, which covers both replicated clients and the AOF client. Fixes #2995, introduced in #1949. Signed-off-by: aditya.teltia <teltia.aditya22@gmail.com>
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Feb 19, 2026
…n and data corruption (valkey-io#3004) When loading AOF in cluster mode, keys inside a MULTI/EXEC block could be inserted into wrong hash slots, causing key duplication and data corruption. The root cause was the slot caching optimization in getKeySlot(). This optimization reuses a cached slot value to avoid recalculating the hash for every key operation. However, when replaying AOF, a transaction may contain commands affecting keys in different slots. The cached slot from a previous command (e.g., SET k1) would incorrectly be used for subsequent commands in the transaction (e.g., SET k0), causing k0 to be stored in k1's slot. The existing code already skipped this optimization for replicated clients (commands from primary) using isReplicatedClient(). This change extends that to also skip for AOF clients by using mustObeyClient() instead, which covers both replicated clients and the AOF client. Fixes valkey-io#2995, introduced in valkey-io#1949. Signed-off-by: aditya.teltia <teltia.aditya22@gmail.com>
hpatro
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Mar 5, 2026
…n and data corruption (valkey-io#3004) When loading AOF in cluster mode, keys inside a MULTI/EXEC block could be inserted into wrong hash slots, causing key duplication and data corruption. The root cause was the slot caching optimization in getKeySlot(). This optimization reuses a cached slot value to avoid recalculating the hash for every key operation. However, when replaying AOF, a transaction may contain commands affecting keys in different slots. The cached slot from a previous command (e.g., SET k1) would incorrectly be used for subsequent commands in the transaction (e.g., SET k0), causing k0 to be stored in k1's slot. The existing code already skipped this optimization for replicated clients (commands from primary) using isReplicatedClient(). This change extends that to also skip for AOF clients by using mustObeyClient() instead, which covers both replicated clients and the AOF client. Fixes valkey-io#2995, introduced in valkey-io#1949. Signed-off-by: aditya.teltia <teltia.aditya22@gmail.com> Signed-off-by: Harkrishn Patro <bunty.hari@gmail.com>
lmagomes
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This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [docker.io/valkey/valkey](https://github.com/valkey-io/valkey) | image | patch | `9.0.1` → `9.0.4` | --- ### Release Notes <details> <summary>valkey-io/valkey (docker.io/valkey/valkey)</summary> ### [`v9.0.4`](https://github.com/valkey-io/valkey/releases/tag/9.0.4) [Compare Source](valkey-io/valkey@9.0.3...9.0.4) Upgrade urgency SECURITY: This release includes security fixes we recommend you apply as soon as possible. ##### Security fixes - (CVE-2026-23479) Use-After-Free in unblock client flow - (CVE-2026-25243) Invalid Memory Access in RESTORE command - (CVE-2026-23631) Use-after-free when full sync occurs during a yielding Lua/function execution ### [`v9.0.3`](https://github.com/valkey-io/valkey/releases/tag/9.0.3) [Compare Source](valkey-io/valkey@9.0.2...9.0.3) ##### Valkey 9.0.3 Upgrade urgency SECURITY: This release includes security fixes we recommend you apply as soon as possible. ##### Security fixes - (CVE-2025-67733) RESP Protocol Injection via Lua error\_reply - (CVE-2026-21863) Remote DoS with malformed Valkey Cluster bus message - (CVE-2026-27623) Reset request type after handling empty requests ##### Bug fixes - Avoids crash during MODULE UNLOAD when ACL rules reference a module command and subcommand ([#​3160](valkey-io/valkey#3160)) - Fix server assert on ACL LOAD when current user loses permission to channels ([#​3182](valkey-io/valkey#3182)) - Fix bug causing no response flush sometimes when IO threads are busy ([#​3205](valkey-io/valkey#3205)) ### [`v9.0.2`](https://github.com/valkey-io/valkey/releases/tag/9.0.2) [Compare Source](valkey-io/valkey@9.0.1...9.0.2) Upgrade urgency HIGH: There are critical bugs that may affect a subset of users. #### Bug fixes - Avoid memory leak of new argv when HEXPIRE commands target only non-exiting fields ([#​2973](valkey-io/valkey#2973)) - Fix HINCRBY and HINCRBYFLOAT to update volatile key tracking ([#​2974](valkey-io/valkey#2974)) - Avoid empty hash object when HSETEX added no fields ([#​2998](valkey-io/valkey#2998)) - Fix case-sensitive check for the FNX and FXX arguments in HSETEX ([#​3000](valkey-io/valkey#3000)) - Prevent assertion in active expiration job after a hash with volatile fields is overwritten ([#​3003](valkey-io/valkey#3003), [#​3007](valkey-io/valkey#3007)) - Fix HRANDFIELD to return null response when no field could be found ([#​3022](valkey-io/valkey#3022)) - Fix HEXPIRE to not delete items when validation rules fail and expiration is in the past ([#​3023](valkey-io/valkey#3023), [#​3048](valkey-io/valkey#3048)) - Fix how hash is handling overriding of expired fields overwrite ([#​3060](valkey-io/valkey#3060)) - HSETEX - Always issue keyspace notifications after validation ([#​3001](valkey-io/valkey#3001)) - Make zero a valid TTL for hash fields during import mode and data loading ([#​3006](valkey-io/valkey#3006)) - Trigger prepareCommand on argc change in module command filters ([#​2945](valkey-io/valkey#2945)) - Restrict TTL from being negative and avoid crash in import-mode ([#​2944](valkey-io/valkey#2944)) - Fix chained replica crash when doing dual channel replication ([#​2983](valkey-io/valkey#2983)) - Skip slot cache optimization for AOF client to prevent key duplication and data corruption ([#​3004](valkey-io/valkey#3004)) - Fix used\_memory\_dataset underflow due to miscalculated used\_memory\_overhead ([#​3005](valkey-io/valkey#3005)) - Avoid duplicate calculations of network-bytes-out in slot stats with copy-avoidance ([#​3046](valkey-io/valkey#3046)) - Fix XREAD returning error on empty stream with + ID ([#​2742](valkey-io/valkey#2742)) #### Performance/Efficiency Improvements - Track reply bytes in I/O threads if commandlog-reply-larger-than is -1 ([#​3086](valkey-io/valkey#3086), [#​3126](valkey-io/valkey#3126)). This makes it possible to mitigate a performance regression in 9.0.1 caused by the bug fix [#​2652](valkey-io/valkey#2652). **Full Changelog**: <valkey-io/valkey@9.0.1...9.0.2> </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - "before 6am" - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xNjkuNCIsInVwZGF0ZWRJblZlciI6IjQzLjE2OS40IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJyZW5vdmF0ZSJdfQ==-->
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When loading AOF in cluster mode, keys inside a MULTI/EXEC block could be
inserted into wrong hash slots, causing key duplication and data corruption.
The root cause was the slot caching optimization in getKeySlot(). This
optimization reuses a cached slot value to avoid recalculating the hash
for every key operation. However, when replaying AOF, a transaction may
contain commands affecting keys in different slots. The cached slot from
a previous command (e.g., SET k1) would incorrectly be used for subsequent
commands in the transaction (e.g., SET k0), causing k0 to be stored in k1's
slot.
The existing code already skipped this optimization for replicated clients
(commands from primary) using isReplicatedClient(). This change extends
that to also skip for AOF clients by using mustObeyClient() instead, which
covers both replicated clients and the AOF client.
Fixes #2995, introduced in #1949.