Zhou JIANG created SPARK-51770:
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Summary: Set Content-Type headers for Prometheus v3 compatibility
Key: SPARK-51770
URL: https://issues.apache.org/jira/browse/SPARK-51770
Project: Spark
Issue Type: Sub-task
Components: Kubernetes
Affects Versions: kubernetes-operator-0.1.0
Reporter: Zhou JIANG
Prometheus v3 will fail the scrape if the Content-Type header is not present in
response and the fallback scrape protocol is not configured. Therefore we'd
configure the headers properly for the operator metrics handler.
Please also refer
[https://prometheus.io/docs/prometheus/latest/migration/#scrape-protocols]
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