jakubmatyszewski opened a new pull request, #66411:
URL: https://github.com/apache/airflow/pull/66411
Noticed following error in triggerer logs:
```
[2026-05-05T08:02:00.644020Z] {{__init__.py:149}} ERROR - Failed to encode
key result: Invalid type <class 'NoneType'> of value None
Traceback (most recent call last):
File
"/home/airflow/.local/lib/python3.13/site-packages/opentelemetry/exporter/otlp/proto/common/_internal/__init__.py",
line 146, in _encode_attributes
_encode_key_value(key, value, allow_null=allow_null)
~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.13/site-packages/opentelemetry/exporter/otlp/proto/common/_internal/__init__.py",
line 107, in _encode_key_value
key=key, value=_encode_value(value, allow_null=allow_null)
~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/airflow/.local/lib/python3.13/site-packages/opentelemetry/exporter/otlp/proto/common/_internal/__init__.py",
line 100, in _encode_value
raise Exception(f"Invalid type {type(value)} of value {value}")
Exception: Invalid type <class 'NoneType'> of value None
```
I've compared implementation of
`_make_trigger_span`[*](https://github.com/apache/airflow/blob/209c815bc91d4f537c191af7e27c31a2c2f48c73/airflow-core/src/airflow/jobs/triggerer_job_runner.py#L138)
with
`_make_task_span`[*](https://github.com/apache/airflow/blob/209c815bc91d4f537c191af7e27c31a2c2f48c73/task-sdk/src/airflow/sdk/execution_time/task_runner.py#L163)
and my guess is that it failed due to `map_index` being `None`.
Proposed fix filters out `None` values before building the attributes dict.
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