Hi all,
As discussed during the recent Fall ATS Summit (see
https://cwiki.apache.org/confluence/display/TS/Presentations+-+2019?preview=/112821251/132320653/Collapsed%20Forwarding%20.pdf
), Thundering Herd/Connection Collapse solution has been reworked and added
directly into the ATS core using a combination of Read-While-Retry and
Open-Read-Retry features. This feature is now merged to ATS 9 (and likely will
also be back ported to ATS 8).
As a result of this evolution, collapsed_forwarding plugin
(https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/collapsed_forwarding.en.html)
is not required any more. We plan to remove this plugin and related configs in
ATS 10.0.0.
If you are using this plugin in production, it is encouraged to start migrating
to use the core solution (see docs below - note the new mode `5` ) as soon as
possible.
https://docs.trafficserver.apache.org/en/latest/admin-guide/files/records.config.en.html#proxy-config-http-cache-open-write-fail-action
- Sudheer
