v1.33.0 (2024-05-09)

Context

• No changes.

Traces

• Links with invalid SpanContext are recorded.
  (#3928)

Metrics

• Change the exemplar behavior to be on by default.
  (#3994)
• Use normative language for exemplar default aggregations.
  (#4009)
• Mark Exemplars as stable.
  (#3870)
• Mark synchronous gauge as stable.
  (#4019)

Logs

• Allow implementations to export duplicate keys in a map as an opt-in option.
  (#3987)

Events

• No changes.

Resource

• No changes.

OpenTelemetry Protocol

• No changes.

Compatibility

• Add name suggestion for option to apply resource attributes as metric attributes in Prometheus exporter.
  (#3837)

SDK Configuration

• Clarify syntax for environment variable substitution regular expression
  (#4001)
• Error out on invalid identifiers in environment variable substitution.
  (#4002)
• Add end to end examples for file configuration
  (#4018)
• Clarify the schema for YAML configuration files
  (#3973)

Common

• No changes.

Supplementary Guidelines

• No changes.

New Contributors

• @weslenteche made their first contribution in #3993