Redis sunionstore returning Protocol error: invalid multibulk length -


i'm trying run sunionstore command, somehow crashes out protocol error: invalid multibulk length.. call made around 1.1m keys, lot-ish, shouldn't redis, right?

i tried incrementally decreasing number of keys , started working again @ around 1.05m. checked first/last half , both options work, it's not invalid key somewhere or anything.

any ideas? let me know if can else debug.

ps. fwiw call being made node.js app, don't suppose can relevant can it.

pps. tried running same call redis-py , same thing happens (instead it's redis.exceptions.connectionerror: error 104 while writing socket. connection reset peer.)

the execution time of both successful , failed calls small, <1s, that's unlikely issue.

the issue happens regardless if sets unify or not, i.e. fails fake keys union empty.


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