OLTP Span Exporter isn't compatible with HTTP 2 OLTP endpoints

I'm trying to use the OLTP Span exporter for metrics and traces to export to an OLTP endpoint.

This endpoint supports HTTP/2, per the spec OLTP endpoints can support both HTTP/2 and HTTP/1.1 https://opentelemetry.io/docs/specs/otlp/#otlphttp and if they do, they should fall back to HTTP/1.1.

This is my configuration code.

from opentelemetry.sdk.resources import SERVICE_NAME, Resource

from opentelemetry import trace
from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor

from opentelemetry import metrics
from opentelemetry.exporter.otlp.proto.http.metric_exporter import OTLPMetricExporter
from opentelemetry.sdk.metrics import MeterProvider
from opentelemetry.sdk.metrics.export import PeriodicExportingMetricReader

def configure_oltp_tracing(service_name: str = "demo", endpoint: str = "http://localhost:4317"):
    # Service name is required for most backends
    resource = Resource(attributes={
        SERVICE_NAME: service_name
    })

    traceProvider = TracerProvider(resource=resource)
    processor = BatchSpanProcessor(OTLPSpanExporter(endpoint=f"{endpoint}/v1/traces"))
    traceProvider.add_span_processor(processor)
    trace.set_tracer_provider(traceProvider)

    reader = PeriodicExportingMetricReader(
        OTLPMetricExporter(endpoint=f"{endpoint}/v1/metrics")
    )
    meterProvider = MeterProvider(resource=resource, metric_readers=[reader])
    metrics.set_meter_provider(meterProvider)

I get the following error when traces are exported (and same for metrics)

ERROR:opentelemetry.exporter.otlp.proto.http.trace_exporter:Failed to export batch code: 400, reason: An HTTP/1.x request was sent to an HTTP/2 only endpoint.

The OLTP Exporters for Python are using the requests package, which doesn't support HTTP/2 at all and likely never will since it's only security patches being applied to it nowadays.

Going forward, this package needs to switch to a different HTTP library like httpx to support HTTP/2.

Start by reviewing the Python OTLP HTTP trace and metric exporters and their current use of requests, then compare the transport requirements in the OTLP HTTP specification with an HTTP/2-capable client. Done means both exporters work with HTTP/2 OTLP endpoints while preserving HTTP/1.1 compatibility, with validation for trace and metric export.