AttributeError: 'NoneType' object has no attribute 'attributes'

[ocelotl]

Run a slightly modified version of the docs example:

from typing import Iterable
from time import sleep

from opentelemetry.exporter.otlp.proto.grpc.metric_exporter import (
    OTLPMetricExporter,
)
from opentelemetry.metrics import (
    CallbackOptions,
    Observation,
    get_meter_provider,
    set_meter_provider,
)
from opentelemetry.sdk.metrics import MeterProvider
from opentelemetry.sdk.metrics.export import PeriodicExportingMetricReader

exporter = OTLPMetricExporter(insecure=True)
reader = PeriodicExportingMetricReader(exporter, export_interval_millis=1000)
provider = MeterProvider(metric_readers=[reader])
set_meter_provider(provider)


def observable_counter_func(options: CallbackOptions) -> Iterable[Observation]:
    yield Observation(1, {})


def observable_up_down_counter_func(
    options: CallbackOptions,
) -> Iterable[Observation]:
    yield Observation(-10, {})


def observable_gauge_func(options: CallbackOptions) -> Iterable[Observation]:
    yield Observation(9, {})


meter = get_meter_provider().get_meter("getting-started", "0.1.2")

# Counter
counter = meter.create_counter("counter")
counter.add(1)

# Async Counter
observable_counter = meter.create_observable_counter(
    "observable_counter",
    [observable_counter_func],
)

# UpDownCounter
updown_counter = meter.create_up_down_counter("updown_counter")
updown_counter.add(1)
updown_counter.add(-5)

# Async UpDownCounter
observable_updown_counter = meter.create_observable_up_down_counter(
    "observable_updown_counter", [observable_up_down_counter_func]
)

# Histogram
histogram = meter.create_histogram("histogram")
histogram.record(99.9)

# Async Gauge
gauge = meter.create_observable_gauge("gauge", [observable_gauge_func])

sleep(6)

running this script (after activating the collector via Docker) produces these errors:

Exception while exporting metrics 'NoneType' object has no attribute 'attributes'
Traceback (most recent call last):
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/export/__init__.py", line 412, in _receive_metrics
    self._exporter.export(metrics_data, timeout_millis=timeout_millis)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 203, in export
    return self._export(metrics_data)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/exporter.py", line 293, in _export
    request=self._translate_data(data),
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 139, in _translate_data
    data_point.attributes
AttributeError: 'NoneType' object has no attribute 'attributes'
Exception while exporting metrics 'NoneType' object has no attribute 'attributes'
Traceback (most recent call last):
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/export/__init__.py", line 412, in _receive_metrics
    self._exporter.export(metrics_data, timeout_millis=timeout_millis)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 203, in export
    return self._export(metrics_data)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/exporter.py", line 293, in _export
    request=self._translate_data(data),
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 139, in _translate_data
    data_point.attributes
AttributeError: 'NoneType' object has no attribute 'attributes'
Exception while exporting metrics 'NoneType' object has no attribute 'attributes'
Traceback (most recent call last):
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/export/__init__.py", line 412, in _receive_metrics
    self._exporter.export(metrics_data, timeout_millis=timeout_millis)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 203, in export
    return self._export(metrics_data)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/exporter.py", line 293, in _export
    request=self._translate_data(data),
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 139, in _translate_data
    data_point.attributes
AttributeError: 'NoneType' object has no attribute 'attributes'
Exception while exporting metrics 'NoneType' object has no attribute 'attributes'
Traceback (most recent call last):
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/export/__init__.py", line 412, in _receive_metrics
    self._exporter.export(metrics_data, timeout_millis=timeout_millis)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 203, in export
    return self._export(metrics_data)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/exporter.py", line 293, in _export
    request=self._translate_data(data),
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 139, in _translate_data
    data_point.attributes
AttributeError: 'NoneType' object has no attribute 'attributes'
Exception while exporting metrics 'NoneType' object has no attribute 'attributes'
Traceback (most recent call last):
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/export/__init__.py", line 412, in _receive_metrics
    self._exporter.export(metrics_data, timeout_millis=timeout_millis)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 203, in export
    return self._export(metrics_data)
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/exporter.py", line 293, in _export
    request=self._translate_data(data),
  File "/home/ocelotl/github/ocelotl/opentelemetry-python/exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 139, in _translate_data
    data_point.attributes
AttributeError: 'NoneType' object has no attribute 'attributes'
shutdown