ERROR 2003 (HY000)

问题：

[root@mycat ~/mycat/conf]# mysql -u root -p -P 8066 -h 127.0.0.1 --default-auth=mysql_native_password
Enter password: 
ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)

解决：

[root@mycat ~]# cd mycat
[root@mycat ~/mycat]# ls
bin  catlet  conf  lib  version.txt  wrapper.log
[root@mycat ~/mycat]# mkdir logs
[root@mycat ~/mycat]# mycat restart
Stopping Mycat-server...
Mycat-server was not running.
Starting Mycat-server...
[root@mycat ~/mycat]# mysql -u root -p -P 8066 -h 127.0.0.1 --default-auth=mysql_native_password

mysql> show databases;
+----------+
| DATABASE |
+----------+
| TESTDB   |
+----------+
1 row in set (0.01 sec)

原因：

源包并未带logs包，必须创建logs目录