Error information:

Discovered coordinator DESKTOP-NRTTBDM:9092 (id: 2147483647 rack: null) for group itstyle.

reason:

The host of Kafka running on windows is the machine name, not the IP address

So it will lead to error reporting

Desktop-nrttbdm is the host name of the server where the Kafka instance is located
and 9092 is the port of Kafka, that is, the connection address of Kafka.

Solution

Modify the hosts file directly

The windows hosts file is located in

C:\Windows\System32\drivers\etc\hosts

Open it with administrator’s permission and append the corresponding relationship between IP and host name

Add the

172.18.0.52 DESKTOP-NRTTBDM

Restart the service again

Problem solved!