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:
![Click to enlarge](https://support.huaweicloud.com/eu/dcs_faq/en-us_image_0000001152024162.png)
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:
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.
![](https://support.huaweicloud.com/eu/dcs_faq/public_sys-resources/notice_3.0-en-us.png)
Session sharing is supported only by single-node and master/standby DCS Redis instances, but not by cluster DCS Redis instances.
Client and Network Connection FAQs
- Troubleshooting Redis Connection Failures
- Does DCS Support Cross-VPC Access?
- Why Is "(error) NOAUTH Authentication required" Displayed When I Access a DCS Redis Instance?
- What Should I Do If Access to DCS Fails After Server Disconnects?
- Why Do Requests Sometimes Time Out in Clients?
- What Should I Do If an Error Is Returned When I Use the Jedis Connection Pool?
- What If "ERR Unsupported CONFIG subcommand" is Displayed in SpringCloud?
- What Can I Do If I Fail to Access a DCS Instance Using Its Domain Name Address?
- What Should Be Noted When Using Redis for Pub/Sub?
- What Can I Do If Error "Cannot assign requested address" Is Returned When I Access Redis Using connect?
- Connection Pool Selection and Recommended Jedis Parameter Settings
- What Can I Do If a Lettuce 6.x Client Is Incompatible with My DCS Instance?
- Should I Use a Domain Name or an IP Address to Connect to a DCS Redis Instance?
- Is the Read-only Address of a Master/Standby Instance Connected to the Master or Standby Node?
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