update OTLPMetricExporter to respect timeout

Author: herin049

exporter/opentelemetry-exporter-otlp-json-http/src/opentelemetry/exporter/otlp/json/http/_internal/__init__.py

@@ -75,7 +75,7 @@ def __init__(
         if certificate is False:
             pool_kwargs["cert_reqs"] = "CERT_NONE"
         elif certificate and isinstance(certificate, str):
-            pool_kwargs["cert_file"] = certificate
+            pool_kwargs["ca_certs"] = certificate
 
         self._http = urllib3.PoolManager(
             **pool_kwargs,

exporter/opentelemetry-exporter-otlp-json-http/src/opentelemetry/exporter/otlp/json/http/metric_exporter/__init__.py

@@ -117,15 +117,20 @@ def __init__(
     def export(
         self,
         metrics_data: MetricsData,
-        timeout_millis: float | None = 10000,
+        timeout_millis: float | None = 10_000,
         **kwargs,
     ) -> MetricExportResult:
         if self._shutdown:
             _logger.warning("Exporter already shutdown, ignoring batch")
             return MetricExportResult.FAILURE
 
         export_request = encode_metrics(metrics_data)
-        deadline = time.time() + self._timeout
+        timeout = (
+            self._timeout
+            if timeout_millis is None
+            else min(self._timeout, timeout_millis / 1000)
+        )
+        deadline = time.time() + timeout
         for batch in split_metrics_data(
             export_request, self._max_export_batch_size
         ):