Marton Greber created KUDU-3775:
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Summary: BuildPrometheusLabels DCHECK restricts new Prometheus
label format to known entity types
Key: KUDU-3775
URL: https://issues.apache.org/jira/browse/KUDU-3775
Project: Kudu
Issue Type: Improvement
Reporter: Marton Greber
BuildPrometheusLabels() in prometheus_writer.cc contains a DCHECK that
hard-codes the set of valid entity types to "server", "table", and "tablet":
DCHECK(entity_type == "server" ||
entity_type == "table" ||
entity_type == "tablet")
This prevents enabling --metrics_prometheus_use_entity_labels=true for
any entity type outside this set, including synthetic test entities
(e.g. "test_entity"). As a result, unit tests for Prometheus filtering
(KUDU-3690) cannot use the new label-based format and are forced to
rely on the legacy format instead.
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