rel/0.12 0.12.3 rc2

commit a8c5dc8a13a4b90303fec4b29e40a1b33e6b737d
Author: HTHou <hhaonan@outlook.com>
Date: Sun Nov 14 12:46:16 2021 +0800

[maven-release-plugin] prepare release v0.12.3

ulimit -n
65536

1. test data

10 sg / 100dev /100 sensor （DOUBLE）
10 dev/sg
1 sensor/dev
200000000 points/sensor

2. execte 100 queries : Too many open files

select count(s_0) from each device ：
./sbin/start-cli.sh -p 6667 -e "select count() from root.ip5.ip58.d_88 "
./sbin/start-cli.sh -p 6667 -e "select count(s_0) from root.ip5.ip59.d_99 "
...

log_error.log : Too many open files

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Total line number = 1

expected : 200000000