jrushford edited a comment on issue #8712:
URL: https://github.com/apache/trafficserver/issues/8712#issuecomment-1064708186
@amoghyermalkar123 Here are my replies
1. Yes, the child will mark the parent down for a connection failure but
not if the parent sends a 502 response to the child. There are some config
options in parent.config that you can use to have the child retry a 502
response from a parent using a different parent. There is also this
configuration parameter to be aware of for markdowns:
[proxy.config.http.parent_proxy.fail_threshold](https://docs.trafficserver.apache.org/admin-guide/files/records.config.en.html#proxy-config-http-parent-proxy-fail-threshold)
2.
[proxy.config.http.parent_proxy.retry_time](https://docs.trafficserver.apache.org/admin-guide/files/records.config.en.html?highlight=proxy%20config%20http%20parent_proxy%20retry_time#proxy.config.http.parent_proxy.retry_time)
is basically sliding retry window setting. Once the retry_time expires, a
down parent is selected and is retried. If the transaction is successful, the
parent is marked up. If the connection fails, the parent is left down and the
retry time is set again.
3. Your configs look good. The only thing I can think of is to just look
through the [Parent Proxy Configuration
settings](https://docs.trafficserver.apache.org/admin-guide/files/records.config.en.html#parent-proxy-configuration),
the
[parent.config](https://docs.trafficserver.apache.org/admin-guide/files/parent.config.en.html?highlight=parent%20config#std-configfile-parent.config),
and [Hierarchical
Caching](https://docs.trafficserver.apache.org/admin-guide/configuration/hierarchical-caching.en.html?highlight=strategies)
In a future release, parent.config will probably be deprecated. In ATS 9.1
and preferably 9.2, You can use
[strategies.yaml](https://docs.trafficserver.apache.org/admin-guide/files/strategies.yaml.en.html)
as this will replace parent.config
I'm on the ATS slack channel and you can always email the user list or
myself directly, [email protected]
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