lidavidm commented on a change in pull request #11925:
URL: https://github.com/apache/arrow/pull/11925#discussion_r769760049
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File path: cpp/src/arrow/util/tracing_internal.cc
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@@ -68,15 +112,14 @@ std::unique_ptr<sdktrace::SpanExporter>
InitializeExporter() {
auto maybe_env_var = arrow::internal::GetEnvVar(kTracingBackendEnvVar);
if (maybe_env_var.ok()) {
auto env_var = maybe_env_var.ValueOrDie();
- if (env_var == "otlp_http") {
-#ifdef ARROW_WITH_OPENTELEMETRY
+ if (env_var == "ostream") {
+ return
arrow::internal::make_unique<otel::exporter::trace::OStreamSpanExporter>();
+ } else if (env_var == "otlp_http") {
namespace otlp = opentelemetry::exporter::otlp;
otlp::OtlpHttpExporterOptions opts;
return arrow::internal::make_unique<otlp::OtlpHttpExporter>(opts);
-#else
- ARROW_LOG(WARNING) << "Requested " << kTracingBackendEnvVar << "=" < < <
< env_var
- " but Arrow was not built with ARROW_WITH_OPENTELEMETRY";
-#endif
+ } else if (env_var == "arrow_otlp_stdout") {
Review comment:
We could add it.
It stands for [OpenTeLemetry
Protocol](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/otlp.md)
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