shinrich opened a new issue #7574:
URL: https://github.com/apache/trafficserver/issues/7574
I accidentally ran across this while doing "traffic_ctl config match".
There is no documentation. Looking in the code I get the following from
HttpTransact.cc in HttpTransact::initialize_state_variables_from_request
```
// If this is an internal request, never keep alive
if (!s->txn_conf->keep_alive_enabled_in) {
s->client_info.keep_alive = HTTP_NO_KEEPALIVE;
} else if (vc && vc->get_is_internal_request()) {
// Following the trail of JIRAs back from TS-4960, there can be issues
with
// EOS event delivery when using keepalive on internal PluginVC session.
As
// an interim measure, if proxy.config.http.keepalive_internal_vc is set,
// we will obey the incoming transaction's keepalive request.
s->client_info.keep_alive =
s->http_config_param->keepalive_internal_vc ?
incoming_request->keep_alive_get() : HTTP_NO_KEEPALIVE;
} else {
s->client_info.keep_alive = incoming_request->keep_alive_get();
}
```
We run with this set to 0.
Tracking down "git blame" for the relevant lines. Since this was proposed
as an interim solution, perhaps we can remove it?
```
commit b31ae0bf97ed5e6943a2a1311ea70b67aa7964ef
Author: James Peach <[email protected]>
Date: Wed Oct 12 15:28:27 2016 -0700
TS-4963: Add option to obey keepalive on internal transactions.
Add the proxy.config.http.keepalive_internal_vc configuration option
to obey the keepalive state on internal transactions. This should be
considered an interim measure until the problems around event delivery
on half-closed internal sessions are investigated.
```
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