ERR redis module_error ai_generated true

ERR Function load failed: library version mismatch, expected 1 but got 2

ID: redis/function-load-version-mismatch

Also available as: JSON · Markdown · 中文
90%Fix Rate
88%Confidence
1Evidence
2024-06-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
7.0 active — — —
7.2 active — — —
8.0-m3 active — — —

Root Cause

The Redis Functions library being loaded has a version number that does not match the version expected by the server, likely due to API changes between Redis versions.

generic

中文

加载的 Redis 函数库版本号与服务器期望的版本不匹配，通常是由于 Redis 版本之间的 API 变更所致。

Official Documentation

https://redis.io/docs/latest/manual/functions-intro/

Workarounds

  1. 90% success Upgrade the library to match the Redis server version by regenerating it with the correct API. Example: FUNCTION LOAD "#!lua name=mylib version=2 ..." 
    Upgrade the library to match the Redis server version by regenerating it with the correct API. Example: FUNCTION LOAD "#!lua name=mylib version=2 ..."
  2. 85% success If the library was written for an older Redis version, rewrite it to use the current API, e.g., replace deprecated functions like redis.call with redis.pcall or adjust argument handling. 
    If the library was written for an older Redis version, rewrite it to use the current API, e.g., replace deprecated functions like redis.call with redis.pcall or adjust argument handling.
  3. 95% success Delete the old library using FUNCTION DELETE and reload the correct version. 
    Delete the old library using FUNCTION DELETE and reload the correct version.

中文步骤

  1. Upgrade the library to match the Redis server version by regenerating it with the correct API. Example: FUNCTION LOAD "#!lua name=mylib version=2 ..."
  2. If the library was written for an older Redis version, rewrite it to use the current API, e.g., replace deprecated functions like redis.call with redis.pcall or adjust argument handling.
  3. Delete the old library using FUNCTION DELETE and reload the correct version.

Dead Ends

Common approaches that don't work:

  1. Force-load the library by ignoring the version check using a custom flag. 95% fail

    Redis does not support ignoring version mismatches; loading will fail regardless.

  2. Downgrade the Redis server to match the library version. 40% fail

    This may introduce security vulnerabilities and break other features; it's not a scalable solution.

  3. Manually edit the library file to change the version number. 70% fail

    The version number is part of the library's serialization format; changing it can cause runtime errors or crashes.