build more connection on each request

i setup percona cluster with only one node for simpilicity … every thing is fine and works , but i found that when i establish a connection to that , more than one connection are generated !
this is my process on mysql before new connection request :

mysql> show processlist;

±—±------------±----------±-----±--------±-----±-------------------±-----------------±----------±--------------+
| Id | User | Host | db | Command | Time | State | Info | Rows_sent | Rows_examined |
±—±------------±----------±-----±--------±-----±-------------------±-----------------±----------±--------------+
| 1 | system user | | NULL | Sleep | 523 | NULL | NULL | 0 | 0 |
| 2 | system user | | NULL | Sleep | 523 | wsrep aborter idle | NULL | 0 | 0 |
| 16 | root | localhost | NULL | Query | 0 | init | show processlist | 0 | 0 |
±—±------------±----------±-----±--------±-----±-------------------±-----------------±----------±--------------+

and after new connection is request by root user , this is what happen :

mysql> show processlist;

±—±------------±-------------------±-----±--------±-----±-------------------±-----------------±----------±--------------+
| Id | User | Host | db | Command | Time | State | Info | Rows_sent | Rows_examined |
±—±------------±-------------------±-----±--------±-----±-------------------±-----------------±----------±--------------+
| 1 | system user | | NULL | Sleep | 530 | NULL | NULL | 0 | 0 |
| 2 | system user | | NULL | Sleep | 530 | wsrep aborter idle | NULL | 0 | 0 |
| 16 | root | localhost | NULL | Query | 0 | init | show processlist | 0 | 0 |
| 17 | root | 192.168.1.200:2402 | NULL | Sleep | 1 | | NULL | 5 | 5 |
| 19 | root | 192.168.1.200:2404 | NULL | Sleep | 0 | | NULL | 0 | 0 |
| 20 | root | 192.168.1.200:2405 | NULL | Sleep | 0 | | NULL | 0 | 0 |
±—±------------±-------------------±-----±--------±-----±-------------------±-----------------±----------±--------------+

also this is my.cnf config :

[mysqld]
#port=4949

Path to Galera library

wsrep_provider=/usr/lib64/libgalera_smm.so

Cluster connection URL

wsrep_cluster_address=gcomm://192.168.1.149,192.168.1.150

In order for Galera to work correctly binlog format should be ROW

binlog_format=ROW

MyISAM storage engine has only experimental support

default_storage_engine=InnoDB

This changes how |InnoDB| autoincrement locks are managed and is a requirement for Galera

innodb_autoinc_lock_mode=2
wsrep_node_address=192.168.1.149
wsrep_sst_method=rsync
wsrep_cluster_name=aryanic_cluster

what the problem is ? any suggesstion ?

sorry , i found this happen if i connect to percona via mysql query browser or mysql workbench… any body have this experience like me ?