Create less load for TestActivatorChainHandlerWithFullDuplex

[skonto]

Potentially fixes #14806

Proposed Changes

• This patch drops the time that the test takes from ~1m to ~7s:

=== RUN TestActivatorChainHandlerWithFullDuplex
logger.go:130: 2024-01-22T15:05:08.626+0200 DEBUG configmap/store.go:155 activator config "config-tracing" config was added or updated: &config.Config{Backend:"none", ZipkinEndpoint:"", Debug:false, SampleRate:0.1}
--- PASS: TestActivatorChainHandlerWithFullDuplex (6.73s)
PASS

• User can still reproduce the full duplex error if user comments out: ah = WrapActivatorHandlerWithFullDuplex(ah, logger):

=== RUN TestActivatorChainHandlerWithFullDuplex
logger.go:130: 2024-01-22T15:13:32.531+0200 DEBUG configmap/store.go:155 activator config "config-tracing" config was added or updated: &config.Config{Backend:"none", ZipkinEndpoint:"", Debug:false, SampleRate:0.1}
2024/01/22 15:13:39 httputil: ReverseProxy read error during body copy: read tcp 127.0.0.1:59348->127.0.0.1:38235: use of closed network connection
main_test.go:227: error during request: failed to read body: unexpected EOF
--- FAIL: TestActivatorChainHandlerWithFullDuplex (7.35s)

FAIL

• Looking at the job history of the failed tests I see also this run:

2024/01/19 11:11:32 http: proxy error: dial tcp 127.0.0.1:37727: connect: cannot assign requested address
2024/01/19 11:11:32 http: proxy error: dial tcp 127.0.0.1:37727: connect: cannot assign requested address

I am setting a con limit as in here, plus lowering the number of requests.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9acc277) 85.95% compared to head (935890a) 85.93%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14820      +/-   ##
==========================================
- Coverage   85.95%   85.93%   -0.03%     
==========================================
  Files         197      197              
  Lines       14991    14991              
==========================================
- Hits        12885    12882       -3     
- Misses       1793     1796       +3     
  Partials      313      313              

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[ReToCode]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ReToCode, skonto

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[dprotaso]

Awesome - thanks for the quick fix for the flake