> ## Documentation Index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# BZMPOP

> Pop from the first non-empty sorted set, blocking until one arrives.

Use `BZMPOP` to pop members from the first non-empty sorted set among several, blocking until one has members or the timeout expires.

It is the blocking form of [`ZMPOP`](/docs/redis/commands/sorted-set/zmpop): keys are examined in the order given, so earlier keys act as higher priority queues, `MIN` or `MAX` chooses whether the lowest or highest scoring members are taken, and `COUNT` sets how many. The reply names the key that was popped from along with the members and their scores.

The timeout is in seconds, may be fractional, and `0` waits indefinitely; when it expires the reply is null. This is what a worker uses to wait on several priority queues at once without polling.

## Syntax

```redis theme={"system"}
BZMPOP <timeout> <numkeys> <key> [<key> ...] (MIN | MAX) [COUNT <count>]
```

## Arguments

| Argument        | Required | Repeatable | Description                                                                        |
| --------------- | -------- | ---------- | ---------------------------------------------------------------------------------- |
| `<timeout>`     | Yes      | No         | Seconds to block; `0` blocks indefinitely.                                         |
| `<numkeys>`     | Yes      | No         | Number of key arguments that follow.                                               |
| `<key>`         | Yes      | Yes        | Redis key targeted by the command.                                                 |
| `(MIN \| MAX)`  | Yes      | No         | Which members to pop: `MIN` (lowest scores first) or `MAX` (highest scores first). |
| `COUNT <count>` | No       | No         | Maximum number of members to pop.                                                  |

## Important points

* A blocking form holds the request until data arrives or its timeout expires. Set the client/network timeout longer than the command timeout.

## Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

| Protocol | Reply                                                                                     |
| -------- | ----------------------------------------------------------------------------------------- |
| RESP2    | Null bulk string or null array, or two-element array: key and array of member/score pairs |
| RESP3    | Null, or two-element array: key and array of member/score pairs                           |

<Note>
  Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.
</Note>

## Examples

TCP examples use the TLS `REDIS_URL` from the Upstash console. REST examples use `UPSTASH_REDIS_REST_URL` and `UPSTASH_REDIS_REST_TOKEN`.

<AccordionGroup>
  <Accordion title="Redis CLI" icon="terminal">
    ```bash theme={"system"}
    BZMPOP 1.5 1 my-key MIN
    ```
  </Accordion>

  <Accordion title="@upstash/redis" icon="node-js" iconType="brands">
    <Note>
      This command is not supported yet in `@upstash/redis`.
    </Note>
  </Accordion>

  <Accordion title="upstash_redis" icon="python" iconType="brands">
    <Note>
      This command is not supported yet in `upstash_redis`.
    </Note>
  </Accordion>

  <Accordion title="ioredis" icon="node-js" iconType="brands">
    ```ts theme={"system"}
    import Redis from "ioredis";

    const redis = new Redis(process.env.REDIS_URL!);
    const result = await redis.bzmpop("1.5", "1", "my-key", "MIN");
    console.log(result);
    ```
  </Accordion>

  <Accordion title="node-redis" icon="node-js" iconType="brands">
    ```ts theme={"system"}
    import { createClient } from "redis";

    const client = await createClient({ url: process.env.REDIS_URL })
      .on("error", console.error)
      .connect();
    const result = await client.bzmPop(1.5, "my-key", "MIN");
    console.log(result);
    ```
  </Accordion>

  <Accordion title="redis-py" icon="python" iconType="brands">
    ```python theme={"system"}
    import os
    import redis

    client = redis.from_url(os.environ["REDIS_URL"])
    result = client.bzmpop(1.5, 1, ["my-key"], min=True)
    print(result)
    ```
  </Accordion>

  <Accordion title="go-redis" icon="golang" iconType="brands">
    ```go theme={"system"}
    package main

    import (
        "context"
        "fmt"
        "os"
        "time"

        "github.com/redis/go-redis/v9"
    )

    func main() {
        opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))
        if err != nil {
            panic(err)
        }
        client := redis.NewClient(opts)
        _, result, err := client.BZMPop(context.Background(), 1500*time.Millisecond, "min", 0, "my-key").Result()
        if err != nil {
            panic(err)
        }
        fmt.Println(result)
    }
    ```
  </Accordion>

  <Accordion title="jedis" icon="java" iconType="brands">
    ```java theme={"system"}
    import java.net.URI;

    import redis.clients.jedis.Jedis;

    try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {
      Object result = jedis.bzmpop(1.5, redis.clients.jedis.args.SortedSetOption.MIN, "my-key");
      System.out.println(result);
    }
    ```
  </Accordion>

  <Accordion title="redis-rs" icon="rust" iconType="brands">
    ```rust theme={"system"}
    use redis::TypedCommands;

    fn main() -> redis::RedisResult<()> {
        let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");
        let client = redis::Client::open(url)?;
        let mut connection = client.get_connection()?;

        let result = connection.bzmpop_min(1.5, "my-key", 1)?;
        println!("{result:?}");
        Ok(())
    }
    ```
  </Accordion>
</AccordionGroup>


## Related topics

- [Changelog](/docs/redis/overall/changelog.md)
- [ZMPOP](/docs/redis/commands/sorted-set/zmpop.md)