BZPOPMIN key [key ...] timeout
BZPOPMIN is the blocking variant of the sorted set ZPOPMIN primitive.
It is the blocking version because it blocks the connection when there are no members to pop from any of the given sorted sets. A member with the lowest score is popped from first sorted set that is non-empty, with the given keys being checked in the order that they are given.
timeout argument is interpreted as an double value specifying the maximum number of seconds to block. A timeout of zero can be used to block indefinitely.
See the BLPOP documentation for the exact semantics, since BZPOPMIN is identical to BLPOP with the only difference being the data structure being popped from.
Array reply: specifically:
nilmulti-bulk when no element could be popped and the timeout expired.
timeoutis interpreted as a double instead of an integer.
redis> DEL zset1 zset2 (integer) 0 redis> ZADD zset1 0 a 1 b 2 c (integer) 3 redis> BZPOPMIN zset1 zset2 0 1) "zset1" 2) "a" 3) "0"
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