Flaky test on truffle ruby

[mwear]

The opentelemetry-exporter-otlp / ubuntu-latest tests are failing regularly on Truffle Ruby on main. See this example or the cut and pasted output below:

Prepare all required actions
Getting action download info
Run ./.github/actions/test_gem
Run # 🛠️ Setup 🛠️
Run ruby/[email protected]
Modifying PATH
Downloading Ruby
Extracting  Ruby
Print Ruby version
Installing Bundler
Run # 💎 Install dependencies and generate appraisals 💎
Run # 🍿 Test Gem 🍿
🔎 Appraising google_protobuf_3.14
🔎 Appraising google_protobuf_3.15
  Gems included by the bundle:
    * addressable (2.8.4)
    * appraisal (2.2.0)
    * ast (2.4.2)
    * bundler (2.4.17)
    * byebug (11.1.3)
    * coderay (1.1.3)
    * crack (0.4.5)
    * docile (1.4.0)
    * faraday (0.17.6)
    * google-protobuf (3.23.4)
    * googleapis-common-protos-types (1.7.0)
    * hashdiff (1.0.1)
    * json (2.6.3)
    * language_server-protocol (3.17.0.3)
    * method_source (1.0.0)
    * minitest (5.19.0)
    * multipart-post (2.3.0)
    * opentelemetry-api (1.2.1)
    * opentelemetry-common (0.20.0)
    * opentelemetry-exporter-otlp (0.26.1)
    * opentelemetry-registry (0.3.0)
    * opentelemetry-sdk (1.3.0)
    * opentelemetry-semantic_conventions (1.10.0)
    * opentelemetry-test-helpers (0.4.0)
    * parallel (1.23.0)
    * parser (3.2.2.3)
    * pry (0.14.2)
    * pry-byebug (3.10.1)
    * public_suffix (5.0.3)
    * racc (1.7.1)
    * rainbow (3.1.1)
    * rake (12.3.3)
    * regexp_parser (2.8.1)
    * rexml (3.2.6)
    * rubocop (1.55.1)
    * rubocop-ast (1.29.0)
    * ruby-progressbar (1.13.0)
    * simplecov (0.22.0)
    * simplecov-html (0.12.3)
    * simplecov_json_formatter (0.1.4)
    * thor (1.2.2)
    * unicode-display_width (2.4.2)
    * webmock (3.7.6)
    * yard (0.9.34)
    * yard-doctest (0.1.17)
  Run options: --seed 23868
  
  # Running:
  
  ..........F....S.............................
  
  Finished in 2.821293s, 15.9501 runs/s, 44.6604 assertions/s.
  
    1) Failure:
  OpenTelemetry::Exporter::OTLP::Exporter::#export#test_0017_translates all the things [/home/runner/work/opentelemetry-ruby/opentelemetry-ruby/exporter/otlp/test/opentelemetry/exporter/otlp/exporter_test.rb:748]:
  The request POST http://localhost:4318/v1/traces with given block was expected to execute 1 time but it executed 0 times
  
  The following requests were made:
  
  POST http://localhost:4318/v1/traces with body '� �d ���•ͥ�%T�����ZRT�W�������*��ś_����R�CU����^���*���RT�R!���,��83?O����P�X�@h53�

[pichlermarc]

@mwear could it be that an identically named test is also failing for exporter/otlp-http/test/opentelemetry/exporter/otlp/http/trace_exporter_test.rb? :thinking:

Looks to be flaky on not just truffleruby though (main+ruby3.0, #1506 +truffleruby)

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