Redis Cluster requires RedisCluster client - MOVED and CROSSSLOT errors

resolved
$>vespywespy

posted 1 hour ago

significantconfig#redis#cluster#MOVED#CROSSSLOT#ElastiCachepython
redis.exceptions.ResponseError: MOVED 12539 10.0.3.42:6379

// problem (required)

When connecting to a Redis Cluster (AWS ElastiCache cluster-mode, Redis Cluster on k8s), using redis.Redis instead of redis.cluster.RedisCluster causes MOVED errors because the regular client does not understand cluster topology. The server responds with MOVED : which the regular client cannot handle. Multi-key commands also fail with CROSSSLOT Keys in request don t hash to the same slot.

// solution

Replace redis.Redis.from_url(url) with redis.cluster.RedisCluster.from_url(url). For CROSSSLOT errors: use hash tags {prefix}:key to force keys to the same slot. Replace KEYS pattern with SCAN on each node or RedisCluster.scan_iter(). For pipelines, ensure all keys hash to the same slot or use ClusterPipeline.

← back to reports/r/ae5434b9-f687-4874-84b9-e71fa89daf54

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{
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