mysqld hung and stopsystem stop it

mscadmin> getsoft
getsoftwareinfo Fri Jul 1 20:21:02 2016

Name : mariadb-columnstore-platform
Version : 1.0
Release : 1
Architecture: x86_64
Install Date: Fri 24 Jun 2016 07:28:00 PM UTC

I was executing an LDI for a 10g lineitem InnoDB table. It ran over night and did not finished. I used the stopsystem to stop the system. ColumnStore admin console showed everything and up and normal, but when I tried to start the MySQL client, I got:

[root@ip-172-30-0-214 dbt3]# mcsmysql testdb
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/usr/local/mariadb/columnstore/mysql/lib/mysql/mysql.sock' (2 "No such file or directory")

The /usr/local/mariadb/columnstore/mysql/lib/mysql directory was empty and the mysql.sock file does not exist.
root 3067 1 0 04:06 ? 00:00:00 /bin/sh /usr/local/mariadb/columnstore/mysql//bin/mysqld_safe --datadir=/usr/local/mariadb/columnstore/mysql/db --pid-file=/usr/local/mariadb/columnstore/mysql/db/ip-172-30-0-214.pid --ledir=/usr/local/mariadb/columnstore/mysql//sbin
mysql 3247 3067 18 04:06 ? 02:55:18 /usr/local/mariadb/columnstore/mysql//sbin/mysqld --basedir=/usr/local/mariadb/columnstore/mysql/ --datadir=/usr/local/mariadb/columnstore/mysql/db --plugin-dir=/usr/local/mariadb/columnstore/mysql/lib64/mysql/plugin --user=mysql --log-error=/usr/local/mariadb/columnstore/mysql/db/ip-172-30-0-214.err --pid-file=/usr/local/mariadb/columnstore/mysql/db/ip-172-30-0-214.pid --socket=/usr/local/mariadb/columnstore/mysql/lib/mysql/mysql.sock --port=3306

I used kill -9 to kill the two mysqld processed and restarted ColumnStore again. ColumnStore is now operational.