redis runtime_error ai_generated true

ERR unknown subcommand or wrong number of arguments for 'SLOWLOG'

ID: redis/err-unknown-subcommand

Also available as: JSON · Markdown · 中文
90%Fix Rate
85%Confidence
1Evidence
2023-03-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Redis 6.2 active — — —
Redis 7.0 active — — —
Redis 7.2 active — — —
redis-py 4.5.0 active — — —
redis-py 5.0.0 active — — —

Root Cause

Redis received an invalid subcommand or incorrect argument count for a valid command, often due to client library version mismatch or typo.

generic

中文

Redis 收到了无效的子命令或参数数量错误，通常是由于客户端库版本不匹配或拼写错误。

Official Documentation

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

Workarounds

  1. 85% success Update the client library to a version compatible with your Redis server version. For example, in Python using redis-py, run: `pip install redis>=5.0.0` 
    Update the client library to a version compatible with your Redis server version. For example, in Python using redis-py, run: `pip install redis>=5.0.0`
  2. 90% success Verify the correct subcommand syntax by checking the Redis documentation. For SLOWLOG, use: `SLOWLOG GET 10` instead of `SLOWLOG GETALL`. 
    Verify the correct subcommand syntax by checking the Redis documentation. For SLOWLOG, use: `SLOWLOG GET 10` instead of `SLOWLOG GETALL`.
  3. 75% success In the client code, wrap the slow log command in a try-except and fall back to a known working subcommand. Example in Python: `try: r.execute_command('SLOWLOG', 'GET', 10) except redis.exceptions.ResponseError: r.execute_command('SLOWLOG', 'LEN')` 
    In the client code, wrap the slow log command in a try-except and fall back to a known working subcommand. Example in Python: `try: r.execute_command('SLOWLOG', 'GET', 10) except redis.exceptions.ResponseError: r.execute_command('SLOWLOG', 'LEN')`

中文步骤

  1. Update the client library to a version compatible with your Redis server version. For example, in Python using redis-py, run: `pip install redis>=5.0.0`
  2. Verify the correct subcommand syntax by checking the Redis documentation. For SLOWLOG, use: `SLOWLOG GET 10` instead of `SLOWLOG GETALL`.
  3. In the client code, wrap the slow log command in a try-except and fall back to a known working subcommand. Example in Python: `try: r.execute_command('SLOWLOG', 'GET', 10) except redis.exceptions.ResponseError: r.execute_command('SLOWLOG', 'LEN')`

Dead Ends

Common approaches that don't work:

  1. 90% fail

    Restarting does not change the client command that triggered the error.

  2. 70% fail

    The client library still sends the same malformed command.

  3. 60% fail

    This is a workaround that sacrifices monitoring capabilities.