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David LiAntoine Pitrou
27724a5ed0d
David Li authored and Antoine Pitrou committed 8a4d8127aae
ARROW-15044: [C++] Add OpenTelemetry exporters for debugging use

This adds two exporters that can be toggled with an environment variable, for debug use. One is the standard ostream exporter, which logs a human-friendly but machine-unfriendly format. The other uses a trick to log the JSON OTLP request format, which is easily parsable JSON but not very readable.

Closes #11925 from lidavidm/arrow-15044

Authored-by: David Li <li.davidm96@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>