What If "ERR Unsupported CONFIG subcommand" is Displayed in SpringCloud?¶
By using DCS Redis instances, Spring Session can implement session sharing. When interconnecting with Spring Cloud, the following error information is displayed:
Figure 1 Spring Cloud error information¶
For security purposes, DCS does not support the CONFIG command initiated by a client. You need to perform the following steps:
On the DCS console, set the value of the notify-keyspace-event parameter to Egx for a DCS Redis instance.
Add the following content to the XML configuration file of the Spring framework:
<util:constant
static-field="org.springframework.session.data.redis.config.ConfigureRedisAction.NO_OP"/>
Modify the related Spring code. Enable the ConfigureRedisAction.NO_OP bean component to forbid a client to invoke the CONFIG command.
@Bean
public static ConfigureRedisAction configureRedisAction() {
return ConfigureRedisAction.NO_OP;
}
For more information, see the Spring Session Documentation.
Important
Session sharing is supported only by single-node and master/standby DCS Redis instances, but not by cluster DCS Redis instances.