[sdk-platform-java] [o11y] Investigate 500 error reported when client points to non-existent host

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@jinseopkim0 is already working on this.

Since Jul 20, 2026.

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Description

priority: p3 type: bug

HTTP Client failures case name and attributes conform to requirements

  • Manual test: We try to hit a non-existent host.
   TranslationServiceSettings.Builder settingsBuilder = TranslationServiceSettings.newBuilder();
    
   settingsBuilder
	.getStubSettingsBuilder()
	.setEndpoint("non-existent:1234")
	.setTracerFactory(createOpenTelemetryTracerFactory());
  • HTTP
    • Image

    • Confirmed this 500 (UnknwonException) is part of unwrapping the exception (see related code). The actual code may not be desired but it respects the logic, so if a fix is wanted it should be done in gax-httpjson

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