BLPOP command ignores timeout

Question

BLPOP command ignores timeout

HonzaMac opened this issue 7 years ago · comments

Blpop command does not block connection until there is any element present.

Is there any solution, how to do it in amphp?

Niklas Keller · Answer 1 · Wed Mar 01 2017 23:00:44 GMT+0800 (China Standard Time)

https://github.com/amphp/redis/blob/34e4553ccab8db9f71e43b14d391499fae275398/examples/blpop-timeout.php works fine for me.

Honza Machala · Answer 2 · Thu Mar 02 2017 00:10:51 GMT+0800 (China Standard Time)

I actually dont want to wait for 1 second.
Is it possible to ask periodically each 5 ms?

Niklas Keller · Answer 3 · Thu Mar 02 2017 00:38:10 GMT+0800 (China Standard Time)

The blocking list operations only allow timeouts in seconds. You can use https://redis.io/commands/lpop and poll of course.

Honza Machala · Answer 4 · Thu Mar 02 2017 00:40:38 GMT+0800 (China Standard Time)

This is what I'm actually doing, but I expected, that BLPOP with timeout will behave same in amphp/redis like in regular blocking Redis

Niklas Keller · Answer 5 · Thu Mar 02 2017 00:45:25 GMT+0800 (China Standard Time)

Without any timeout it just blocks indefinitely, just like Redis does. We don't have any custom logic.

Niklas Keller · Answer 6 · Mon Mar 06 2017 16:21:49 GMT+0800 (China Standard Time)

@HonzaMac Could you elaborate on the difference between "regular blocking Redis" and the current behavior? I don't think there's one. Will reopen in case something needs to be changed.