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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2020/08/01 16:16:53 UTC

[GitHub] [airflow] rafidka opened a new issue #10091: Airflow Metrics Page Misses Some Metrics

rafidka opened a new issue #10091:
URL: https://github.com/apache/airflow/issues/10091

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**Apache Airflow version**:

N/A

**Kubernetes version (if you are using kubernetes)** (use `kubectl version`):

N/A

**Environment**:

N/A

- **Cloud provider or hardware configuration**:
- **OS** (e.g. from /etc/os-release):
- **Kernel** (e.g. `uname -a`):
- **Install tools**:
- **Others**:

**What happened**:

By inspecting the code of Airflow (1.10.11rc2, though I believe previous versions apply as well), I noticed the [metrics documentation page](https://airflow.apache.org/docs/stable/metrics.html) misses the following metrics:

- *{job_name}*_heartbeat_failure
- dag_file_refresh_error
- scheduler.tasks.executable
- scheduler.tasks.pending
- scheduler.tasks.running
- scheduler.tasks.starving
- scheduler.tasks.without_dagrun
- task_removed_from_dag.{dag_id}
- task_restored_to_dag.{dag_id}
- task_instance_created-*{operator_name}*

Any reason why these are not documented?

Additionally, the following metrics are incorrectly documented:

- dag_processing.processor_timeouts: documented as a guage but it is actually a counter
- dag_processing.last_runtime.*{dag_filename}*: documented as a gauge but it is actually a timer

**What you expected to happen**:

- The Metrics page should document all metrics being emitted by Airflow.
- The Metrics page should correctly document the type of the metric.

**How to reproduce it**:
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- Clone the latest Airflow 1.x code base.
- Search the code base for `Stats.`, i.e. lines that publish metrics using the `Stats` object.
- Compare the result with [Metrics page](https://airflow.apache.org/docs/stable/metrics.html) in Airflow documentation.

**Anything else we need to know**:

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I am happy to send a PR to update the documentation.

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