Filed by: nfay [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=387600398&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/YwqomqdyTyuEDw3KesVJEw/runs/0/artifacts/public/logs/live_backing.log
Reftest URL: https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/YwqomqdyTyuEDw3KesVJEw/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

[task 2022-08-17T11:04:38.246Z] 11:04:38     INFO -  TEST-START | netwerk/test/unit/test_h2proxy_connection_limit.js
[task 2022-08-17T11:09:38.254Z] 11:09:38  WARNING -  TEST-UNEXPECTED-TIMEOUT | netwerk/test/unit/test_h2proxy_connection_limit.js | Test timed out
[task 2022-08-17T11:09:38.255Z] 11:09:38     INFO -  TEST-INFO took 300008ms
[task 2022-08-17T11:09:38.256Z] 11:09:38     INFO -  >>>>>>>
[task 2022-08-17T11:09:38.256Z] 11:09:38     INFO -  (xpcshell/head.js) | test MAIN run_test pending (1)
[task 2022-08-17T11:09:38.256Z] 11:09:38     INFO -  (xpcshell/head.js) | test run_next_test 0 pending (2)
[task 2022-08-17T11:09:38.256Z] 11:09:38     INFO -  (xpcshell/head.js) | test MAIN run_test finished (2)
[task 2022-08-17T11:09:38.256Z] 11:09:38     INFO -  running event loop
[task 2022-08-17T11:09:38.257Z] 11:09:38     INFO -  netwerk/test/unit/test_h2proxy_connection_limit.js | Starting test_connection_limit
[task 2022-08-17T11:09:38.257Z] 11:09:38     INFO -  (xpcshell/head.js) | test test_connection_limit pending (2)
[task 2022-08-17T11:09:38.257Z] 11:09:38     INFO -  (xpcshell/head.js) | test run_next_test 0 finished (2)
[task 2022-08-17T11:09:38.258Z] 11:09:38     INFO -  "socket count is 6
[task 2022-08-17T11:09:38.258Z] 11:09:38     INFO -  "
[task 2022-08-17T11:09:38.258Z] 11:09:38     INFO -  TEST-PASS | netwerk/test/unit/test_h2proxy_connection_limit.js | test_connection_limit - [test_connection_limit : 78] socket count should be less than maxConnections - true == true
[task 2022-08-17T11:09:38.258Z] 11:09:38     INFO -  (xpcshell/head.js) | test run_next_test 1 pending (2)
[task 2022-08-17T11:09:38.259Z] 11:09:38     INFO -  (xpcshell/head.js) | test test_connection_limit finished (2)
[task 2022-08-17T11:09:38.259Z] 11:09:38     INFO -  (xpcshell/head.js) | test run_next_test 1 finished (1)
[task 2022-08-17T11:09:38.259Z] 11:09:38     INFO -  exiting test
[task 2022-08-17T11:09:38.259Z] 11:09:38     INFO -  <<<<<<<
[task 2022-08-17T11:09:38.427Z] 11:09:38     INFO -  xpcshell return code: 1
[task 2022-08-17T11:09:38.449Z] 11:09:38     INFO -  TEST-START | netwerk/test/unit/test_h2proxy_connection_limit.js

:kershaw, since you are the author of the regressor, bug 1772212, could you take a look?
For more information, please visit auto_nag documentation.

Set release status flags based on info from the regressing bug 1772212

Set release status flags based on info from the regressing bug 1772212

This went from TV to tier 1 jobs, the backfills looks like it is caused by Bug 1755660 (at least the tier 1 jobs)
Backfills link: https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&fromchange=49f976dc75d595a5de73540b0ce666a435d60c65&searchStr=windows%2C10%2Cx86%2C2004%2Cwebrender%2Cdebug%2Cxpcshell%2Ctests%2Cwith%2Cnetworking%2Con%2Csocket%2Cprocess%2Ctest-windows10-32-2004-qr%2Fdebug-xpcshell-spi-nw%2Cx2&tochange=ad968b0af68112f4058372a7739ed2544ca652e2&selectedTaskRun=et0THMJQQDCIi9aDzAZviQ.0
Valentin can you please take a look at this?

The test is fairly easy to reproduce in --verify mode under windows.
It seems the connection just hangs if we close the stream with NGHTTP2_CONNECT_ERROR here.

We take that code path because when the socket connected, we respond with a 200 status, then attempting to respond with a 404/502 would throw and close with that error.
For now I'm just going to bypass this problem by checking if we'd already sent the headers, but as a followup we should probably exercise the code path where Firefox receives NGHTTP2_CONNECT_ERROR (but in a deterministic manner).

(verify) by not throwing in HTTP2ProxyCode r=#necko

The patch also removes some redundant code from the test and
fixes a lint error in head_servers.js

https://hg.mozilla.org/mozilla-central/rev/9c833f499833