Redis set becomes empty -

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i have list of 10 million unique items in redis set. when set gets populated run 4 independent workers use spop (get&remove) command. each worker processes 6 items every 20 seconds (the api limits deal with). redis runs pretty default config, appendonly set "yes".

the problem after ~20k items processed redis set becomes empty , workers jobless. why that? there's no ttl on keys , default redis should keep them forever. appendonly.aof file still remains huge on disk.

i run redis 3.0.7 on debian 8, no errors in redis.


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