Spark History Server connector - polls and publishes jobs to NATS
Project description
spark-advisor-hs-connector
Spark History Server connector — fetches job data and publishes to NATS. Part of the spark-advisor ecosystem.
Install
pip install spark-advisor-hs-connector
What it does
Connects to Apache Spark History Server REST API to fetch job metrics, stage details, executor info, and configuration. Operates in two modes:
- On-demand — NATS subscriber for
fetch.jobrequests (returnsJobAnalysis) - Background polling — periodically scans History Server for new applications and publishes them to NATS
History Server endpoints used
GET /api/v1/applications/{app-id}— app metadataGET /api/v1/applications/{app-id}/environment— spark.* configGET /api/v1/applications/{app-id}/stages— stage metricsGET /api/v1/applications/{app-id}/stages/{id}/{attempt}/taskSummary— task distributionGET /api/v1/applications/{app-id}/executors— executor metrics
Deployment
export SA_CONNECTOR_HISTORY_SERVER_URL=http://yarn:18080
export SA_CONNECTOR_NATS__URL=nats://localhost:4222
spark-advisor-hs-connector
Configuration
| Variable | Default | Description |
|---|---|---|
SA_CONNECTOR_HISTORY_SERVER_URL |
http://localhost:18080 |
Spark History Server URL |
SA_CONNECTOR_NATS__URL |
nats://localhost:4222 |
NATS broker URL |
SA_CONNECTOR_POLL_INTERVAL_SECONDS |
60 |
Polling interval |
SA_CONNECTOR_BATCH_SIZE |
50 |
Apps per poll cycle |
Links
License
Apache 2.0
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