Why Is an Instance Abnormal After Configuring the Access Mode?

Symptom

After I configured the access mode, the instance becomes abnormal.

Possible Cause

By default, the backend service TCP health check is enabled on the Access Component from Another Environment > Load Balancing page of CAE, that is, the TCP three-way handshake is performed. After the TCP three-way handshake, data is transmitted. However, RST is sent to interrupt the established TCP connection during health check. This may cause your component to exit due to abnormal TCP connection and print error information, such as "Connection reset by peer".

Solution

1. On the CAE console, choose Component Configurations, click Edit on the Access Mode card, and disable Health Check for the load balancer.
   Figure 1 Disabling health check

   

2. On the Component Configurations page, click Edit on the Health Check card, enable Probe, and set Check Method to HTTP.
3. Ignore the health check connection error in the service code.