Cause

  • When you executed a dexter-server and an error happened as below.

Solutions 

  1. check your max_connection in console or mysql console as below.

    1. ### In Console
c:\mysql> mysqladmin -u root -p variables | grep max_connection
| max_connections | 100  // ▶ This is console output

or 

### In mysql-workbench
mysql > show variables like '%max_connection%';
+-----------------------------------------------+
variable_name |      Value |
+-----------------------------------------------+
max_connections | 100
+-----------------------------------------------+
1 row in set ( 0.00sec)


  2.  If you need to support more connections, you should set a larger value for this variable.

    1. ### in mysql config file  [ linux : my.cnf  / windows : my.ini]
[mysqld]
max_connections = 500

or 

### in mysql
mysql> set global max_connections=500;