Redis NOSCRIPT No matching script

What is Redis NOSCRIPT No matching script

When encountering the error "NOSCRIPT No matching script from Redis," the user can take the following immediate actions:

Identify the missing script: Determine which script is causing the NOSCRIPT error. This can often be found in the application logs or error message.Check script loading: Ensure the script that is causing the error has been properly loaded into Redis using the SCRIPT LOAD command. You can check if a script is loaded by running:SCRIPT EXISTS <script_sha1>Replace <script_sha1> with the SHA1 hash of your script. If it returns 0, the script is not loaded.Load the script: If the script is not loaded, you can load it manually using:SCRIPT LOAD "return redis.call('set','foo','bar')"Replace the command in quotes with your script.Run the script using EVALSHA: After loading the script, use the EVALSHA command with the script's SHA1 hash to run it:EVALSHA <script_sha1> 0Replace <script_sha1> with the SHA1 hash of your script.Check Redis memory usage: High memory usage can lead to scripts being purged. Check memory usage with:INFO memoryLook at the used_memory and maxmemory settings. If used_memory is close to maxmemory, consider increasing maxmemory or reducing memory usage.Check for Redis evictions: If Redis is evicting keys (including loaded scripts under memory pressure), it could cause this error. Check eviction metrics:INFO statsLook for the evicted_keys metric. If it's high, it indicates that Redis is evicting keys due to memory pressure.

Take these steps to investigate and resolve the NOSCRIPT No matching script from Redis error.