gxthrj opened a new issue #4276:
URL: https://github.com/apache/apisix/issues/4276
### Issue description
Now when upstream chooses chash load balancing, and specify the key, such as
```yaml
loadbalancer:
type: chash
hashOn: cookie
key: "X-Foo"
```
If the request does not contain any cookies, all traffic will visit a single
node and will not be sent to other nodes.
In such a scenario, downgrading the load balancing strategy to polling seems
to be a more reasonable solution.
What do you think?
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