salt-minion 启动报错“ global name 'RSA' is not defined”

最近折腾 salt-minion ，用的是综合安装（胡乱安装，有些是源码，有些是 RPM 包安装），终于装完所有包，启动的时候却提示
salt-minion -l debug 提示：
[DEBUG ] Reading configuration from /etc/salt/minion
[DEBUG ] Using cached minion ID from /etc/salt/minion_id: GDZJ-MS-MMDS-SV04-GET04
[DEBUG ] Configuration file path: /etc/salt/minion
[WARNING ] Insecure logging configuration detected! Sensitive data may be logged.
[INFO ] Setting up the Salt Minion "GDZJ-MS-MMDS-SV04-GET04"
[DEBUG ] Created pidfile: /var/run/salt-minion.pid
[DEBUG ] Reading configuration from /etc/salt/minion
[DEBUG ] Attempting to authenticate with the Salt Master at 192.168.70.1
[DEBUG ] Initializing new SAuth for ('/etc/salt/pki/minion', 'GDZJ-MS-MMDS-SV04-GET04', 'tcp://192.168.70.1:4506')
[INFO ] Generating keys: /etc/salt/pki/minion
[INFO ] The salt minion is shut down
[ERROR ] global name 'RSA' is not defined
[WARNING ] ** Restarting minion **
[INFO ] Sleeping random_reauth_delay of 6 seconds
日志的提示：
016-02-24 15:08:26,229 [salt.scripts ][ERROR ][162651] global name 'RSA' is not defined
2016-02-24 15:08:26,229 [salt.scripts ][WARNING ][162651] ** Restarting minion **
2016-02-24 15:08:33,523 [salt.scripts ][ERROR ][162671] global name 'RSA' is not defined
2016-02-24 15:08:33,523 [salt.scripts ][WARNING ][162671] ** Restarting minion **
2016-02-24 15:08:34,811 [salt.scripts ][ERROR ][162692] global name 'RSA' is not defined
2016-02-24 15:08:34,812 [salt.scripts ][WARNING ][162692] ** Restarting minion *^C
2016-02-24 15:08:44,104 [salt.scripts ][ERROR ][162712] global name 'RSA' is not defined
2016-02-24 15:08:44,105 [salt.scripts ][WARNING ][162712] * Restarting minion **
2016-02-24 15:08:50,394 [salt.scripts ][ERROR ][162732] global name 'RSA' is not defined
2016-02-24 15:08:50,394 [salt.scripts ][WARNING ][162732] ** Restarting minion **

大家帮我看看怎么破！