redis runtime_error ai_generated true

ERR unknown command 'FORK'

ID: redis/err-unknown-command-fork

Also available as: JSON · Markdown · 中文
95%Fix Rate
90%Confidence
1Evidence
2024-01-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Redis 7.2.0 active — — —
Redis 6.2.14 active — — —
redis-py 5.0.1 active — — —

Root Cause

A client sent a command that does not exist in the Redis command table, often due to a typo or using a command from a different database (e.g., PostgreSQL FORK).

generic

中文

客户端发送了一个 Redis 命令表中不存在的命令，通常是由于拼写错误或使用了其他数据库（如 PostgreSQL 的 FORK）的命令。

Official Documentation

https://redis.io/docs/latest/commands/

Workarounds

  1. 95% success Check the application code for the exact command string and replace it with the correct Redis command. For example, change `FORK` to `BGSAVE` if the intent was to fork a background save. 
    Check the application code for the exact command string and replace it with the correct Redis command. For example, change `FORK` to `BGSAVE` if the intent was to fork a background save.
  2. 90% success Use Redis' `COMMAND INFO` to verify the command exists: `redis-cli COMMAND INFO FORK` returns empty if unknown. 
    Use Redis' `COMMAND INFO` to verify the command exists: `redis-cli COMMAND INFO FORK` returns empty if unknown.
  3. 85% success If the command is from a third-party library, update the library to use Redis-compatible commands. Example in Python: `r.execute_command('BGSAVE')` instead of `r.execute_command('FORK')`. 
    If the command is from a third-party library, update the library to use Redis-compatible commands. Example in Python: `r.execute_command('BGSAVE')` instead of `r.execute_command('FORK')`.

中文步骤

  1. Check the application code for the exact command string and replace it with the correct Redis command. For example, change `FORK` to `BGSAVE` if the intent was to fork a background save.
  2. Use Redis' `COMMAND INFO` to verify the command exists: `redis-cli COMMAND INFO FORK` returns empty if unknown.
  3. If the command is from a third-party library, update the library to use Redis-compatible commands. Example in Python: `r.execute_command('BGSAVE')` instead of `r.execute_command('FORK')`.

Dead Ends

Common approaches that don't work:

  1. 90% fail

    The command name is still not recognized as a built-in Redis command.

  2. 99% fail

    Redis command set is fixed and not configurable.