Odd indices created automatically - what's happening?

Hi,

Just started to use ES 2.1.1. I have several servers with a logstash 1.5.6-1. Now I noticed, that in addition to the correct daily index, that is created automatically:

ylefi_drupalsv-2016.01.08 5 2 576213 0 1.1gb 390mb

... there is plenty of odd indices like:

green open ylefi_drupalsv-2016.12.18 5 2 1 0 40.5kb 13.5kb
green open ylefi_drupalsv-2016.12.19 5 2 2 0 78.4kb 26.1kb
green open ylefi_drupalsv-2016.12.13 5 2 2 0 75.6kb 25.2kb
green open ylefi_drupalsv-2016.11.20 5 2 1 0 39.5kb 13.1kb

Those odd indices contain just something like this:

{"_scroll_id":"c2Nhbjs1OzY2MzpUN3JqaTdDZlFIS3NjR0E5T0xHSnZBOzI2Njk2Mjp2WFU3aG96RlRtT2lYSU9xNGRMRzV3OzI2Njc3MjpWTXIzU3dkSlNydTNucXZGU2tYbmV3OzY1ODppRU5QeEhhcFQ0ZUVVUzZYNEJGSDRBOzY3MzpJQ0NBb2p6UFJCcWZscnZsYnJyRXF3OzE7dG90YWxfaGl0czoxOw==","took":2,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":0.0,"hits":[]}}

So who is creating those and why and how to stop it? If I delete those, more is coming.

Thanks.

I'll close this as you have this other thread already established - Odd indices created automatically - what is happening?