Calling pipelined function evalsha is blocked when running redis in cluster mode

[zdc13]

Version: 5.0.0

Platform: Python 3.10 on MacOS 13

Description:

The following code does not work:

client = redis.RedisCluster()
pipe = client.pipeline()
pipe.evalsha(sha, 0)
pipe.execute()

redis.exceptions.RedisClusterException: ERROR: Calling pipelined function evalsha is blocked when running redis in cluster mode...

Why is this disallowed? AFAICT this should work fine if the scripts are loaded. It's disallowed in redis/cluster.py in PIPELINE_BLOCKED_COMMANDS, but no reason is documented.

[carlosrochap]

I'm also trying to run a script with pipeline and getting the same error

[rahmed-hartree]

can this be addressed, a similar issue in the node version was fixed: as @zdc13 mentioned, there is no reason why EVALSHA should be a blocked command when run in ClusterPipeline as long as the script is loaded which can be ensured.

reference to explanation: redis/ioredis#536 (comment)

[serozhenka]

Any updates here?

[AIexanderDicke]

Is there any progress on this issue? Maybe the changes from this PR can be ported to the python library?

[GuyEP-Modulate]

I also just ran into this.

[github-actions]

This issue has been automatically marked as stale due to inactivity.
It will be closed in 30 days if no further activity occurs.
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[jakob-keller]

Still relevant

[ahmed5145]

I'd like to take this. Planning to remove EVALSHA from PIPELINE_BLOCKED_COMMANDS so ClusterPipeline can queue it; RedisCluster.determine_slot() already routes EVALSHA by keys. Will add tests + docs update.

[ahmed5145]

Opened #4206