So it's btrfs problem,
i catch hung again with 4.8.7, and i can't catch if ES data stored on ext4
Trace from 4.8.7:
Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: INFO: task
btrfs-transacti:4143 blocked for more than 120 seconds.
Nov 25 14:09:30 msq-k1-srv-ids-01 kernel: Not tainted 4.8.0-1-amd64
Hi, i use btrfs as a storage for root and data for ElasticSearch
servers and i catch strange bug then servers hungs.
But i get this stack trace only if start Elastic.
Debian 8 x64
Linux msq-k1-srv-ids-02 4.8.0-1-amd64 #1 SMP Debian 4.8.5-1
(2016-10-28) x86_64 GNU/Linux
Also catch it on Debian linu
