Real Server removed from all SubVS when failing health checks
Information
| Summary: |
When a real server fails health checks it is removed from all SubVS that contain the same real server. |
| Environment: |
Product: Version: Platform: Application: |
| Question/Problem Description: |
All SubVS that contain the same Real Server IP are marked down at the same time. |
| Steps to Reproduce: | |
| Error Message: | |
| Defect Number: | |
| Enhancement Number: | |
| Cause: | When using HTTP/1.1, the health checks are multiplexed to a single connection. This means that more health checks are sent to the server in a single connection rather than multiple connections. This also means that when one health check begins failing, all connections on this multiplexed connection will also fail. This grouping of connections is why when one RS fails the HTTP/1.1 health check, they are all marked down. |
| Resolution: |
Disabling HTTP/1.1 from the health check resolves this issue. |
| Workaround: | |
| Notes: |