opentelemetry-java v1.68.0

API

• Add null guards and API usage logging for tracing, metrics, propagation, and context APIs (#8913, #8968)
• Add stable io.opentelemetry.api.impl.Base16EncodingUtils and TemporaryBuffers utilities (#8929, #8955)
• Fix uncompilable Javadoc examples in context APIs (#8934)

Incubating

• Avoid false type warnings in DeclarativeConfigProperties.toMap() (#8921)

Extensions

• Trace propagators: Handle malformed URL escapes in Jaeger headers (#8912)
• Trace propagators: Include the B3 debug header in multi-header propagation fields (#8930)
• Trace propagators: Fix hexadecimal flag parsing in Jaeger headers (#8975)

SDK

• Remove cross-module internal utility dependencies from resource and retry code (#8916)
• Add experimental SdkResourceProvider support shared by tracer, meter, and logger providers (#8865)

Traces

• Retain invalid span links with attributes or trace state (#8917)

Metrics

• Use a dedicated export worker in PeriodicMetricReader, queue concurrent flushes, and add setExporterTimeout() with a default equal to the export interval (#8827)

Exporters

• Logging: Fall back to the observed timestamp in SystemOutLogRecordExporter when the timestamp is unset (#8944)
• OTLP: Close the JDK HTTP response body on unsupported Content-Encoding (#8962)
• OTLP: Match the Host header case-insensitively in the managed-channel gRPC sender (#8957)
• OTLP: Fix exporter metric server attributes for hosts that java.net.URI cannot parse (#8941)
• OTLP: Pass the original exception to the JDK HTTP sender’s error callback (#8963)
• OTLP: Retry OkHttp gRPC exports on the current thread to avoid rejection by bounded executors (#8965)
• OTLP: Restore per-attempt retry logging in the OkHttp gRPC sender (#8967)
• OTLP: Correct exporter builder Javadoc (#8996)
• OTLP: Accept 0 as no limit for maximum request body and message sizes (#8945)
• OTLP: gRPC exporter internal telemetry uses rpc.status_code instead of rpc.response.status.code when InternalTelemetryVersion is set to LATEST (#9007)
• Prometheus: Give exemplar trace_id and span_id precedence over filtered attributes (#8959)

Extensions

• BREAKING Incubator: Change SamplingIntent.create() and getTraceStateUpdater() from Function to BiFunction accepting the final SamplingDecision, and fix consistent sampling corner cases (#8952)
• Autoconfigure: Match environment variables for configuration keys containing underscores (#8933, #8951)
• Autoconfigure: Support PeriodicMetricReader batch sizes through otel.metric.export.max.batch.size (#8935)
• Autoconfigure: Correct SPI Javadoc (#8900)

Testing

• Add fluent metric point assertions to MetricAssert (#8994)
• Add a builder supporting aggregation temporality selectors to InMemoryMetricExporter (#8993)

🙇 Thank you

This release was possible thanks to the following contributors who shared their brilliant ideas and awesome pull requests:

@anuraaga @bogdandrutu @breedx-splk @dashpole @jack-berg @jameyg42 @jaydeluca @jkwatson @jsuereth @kamikazeayoup @nbiswal1 @NithinU2802 @opentelemetry-pr-dashboard @psx95 @Rajkaran-122 @rooks-ns @thswlsqls @trask @zeitlinger

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Source open-telemetry/opentelemetry-java · v1.68.0 · 2026-11-06 · upstream release

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