Summary

• [OTLP] Add trace metrics via OTLP span metrics export (#8826)
• Implement span-derived primary tags (AKA Additional tags) on Client-Side-Stats computation (#8766)
• Implement support for DD_TAGS in Client-Side stats (#8823)
• Add EventBridge DSM producer injection (#8639)

Changes

Tracer

• Refactor GraphQL error response building and add pre-emptive truncation (#8647)
• Implement span-derived primary tags (AKA Additional tags) on Client-Side-Stats computation (#8766)
• Minor and performance updates for client-side-stats (#8822)
• Implement support for DD_TAGS in Client-Side stats (#8823)
• Apply cardinality limits to Client-Side stats implementation (#8824)
• [OTLP] Add trace metrics via OTLP span metrics export (#8826)
• Optimise OTEL metrics collection to reduce allocations (#8834)
• Update TruncateUTF8 to never split a code point and improve perf (#8836)
• [Debugger] Log over-length identifier redaction at Warning instead of Error (#8853)
• Attempt to prevent crash on module unload (#8854)

ASM

• [AAP] Add response headers even if no appsec event is present (#8784)
• [Appsec] Add comments and refs to help out codex reviews when libddwaf is involved (#8831)
• [BUG] Fix query obfuscation culture invariant (#8850)

Continuous Profiler

• [Profiler] Fix live objects age (#8842)
• Avoid excessive BuggyBits exceptions in endpoint tests (#8881)

Debugger

• [Debugger] Define debugger safety guidance (#8817)
• [Debugger] Prevent expression member access from invoking getters (#8878)

Fixes

• Remove config_norm_rules.json tests (#8844)

Miscellaneous

• Add dd-autoinstrumentation CLI with LLM-native structured output (#8313)
• [Tests] Add Azure Functions Trigger tests for messaging SDKs (#8698)
• Bump libdatadog to 2.0.0 (~v36.0.0) (#8827)
• Add bounded cardinality limits for OTEL metrics collection (#8846)
• update AAS setup guide (#8848)

Data Streams Monitoring

• Add EventBridge DSM producer injection (#8639)

Build / Test

• [Test] Handle dotnet/runtime#127957 BadImageFormatException fingerprint (#8729)
• [CI] Add commit-only fallback when resolving serverless/single-step Azure build artifacts (#8782)
• Flag new major versions of NuGets we don't support (#8800)
• [Test Package Versions Bump] Updating package versions (#8837)
• [Smoke Test Docker Image Bump] Updating docker image tags (#8838)
• Remove legacy create_draft_release workflow (#8839)
• Bump the gh-actions-packages group across 2 directories with 6 updates (#8851)
• Update CI VMs to use latest images (#8852)
• Remove unused kafka services from docker-compose.ym (#8855)
• [Test Package Versions Bump] Updating package versions (#8857)
• Move webhook url to protected environment (#8863)
• [Test Package Versions Bump] Updating package versions (#8864)
• Update CODEOWNERS to remove IDM from DSM and expand DSM ownership (#8870)
• Fix ADO.NET dropped trace test flakes (#8871)
• Make transaction early-flush writer test deterministic (#8872)
• [Tests] Handle UTF-16 output from ProcDump v12.01 (#8890)

Changes since 3.48.0

Summary

• [Tracing] Add support for IBMMQ 10.x.x
• [Client side stats] Fix incorrect statistic generation introduced in 3.43.0

Changes

Tracer

• Add support for IBM MQ 10.x.x (#8835)
• Fix ObjectDisposedException race in DataStreamsWriter disposal (#8758)

CI Visibility

• [CI Visibility] Avoid oversized coverage IPC messages (#8832)

Debugger

• [Debugger] Guard static member capture (#8814)
• [Debugger] Avoid resolving call tokens in exception replay IL scan (#8815)

Fixes

• Remove sampling-based weighting in Client Side Stats (#8828)

Build / Test

• Update to use dd-sts instead of long-lived credentials (#8809)
• [Test Package Versions Bump] Updating package versions (#8810)
• Fix GitHub Actions bugs and update documentation (#8812)
• [CI] Add net10.0 to AWS Lambda test runtimes (#8819)

Changes since 3.47.0

Summary

• Add support for HotChocolate v16.x (#8802)
• Add support for StackExchange.Redis v3.x (#8808)
• Add support for Amazon.Lambda.RuntimeSupport v2.x (#8797)

Changes

Tracer

• [DBM] Skip telemetry for DBM errors (#8679)
• Trim experimental features flags (#8789)
• Add support for HotChocolate v16.x (#8802)
• Add support for StackExchange.Redis 3.x (#8808)

CI Visibility

• [CI Visibility] Implement ITR code coverage backfill (#8626)

Continuous Profiler

• [Profiler] Generate reference chain (#8225)
• [Profiler] Add support for SMB/CIFS (#8769)
• Fix flake in profiling demo app (#8793)
• [Profiler] Try fixing flakiness (#8813)

Debugger

• [Debugger] Bound root filter capture expressions (#8780)
• [Debugger] Resolve instanceof types at runtime (#8785)
• [Debugger] Avoid instantiating state machine attributes (#8816)

Serverless

• feat: add support for latest Amazon.Lambda.RuntimeSupport package (#8797)

Build / Test

• Use libdatadog for dotnet (#8186)
• [Test Package Versions Bump] Updating package versions (#8786)
• [Smoke Test Docker Image Bump] Updating docker image tags (#8788)
• Add StartDependencies.Profiler to docker-compose.yml (#8792)
• [TESTS] Fix monitoring home calculation fallback for tests (#8798)
• Update DatadogTestLogger package versions to 0.0.54 (#8799)
• Fix RunInstrumentationGenerator (#8801)
• Fix local MSBuild issue with CompileSamples (#8807)

Miscellaneous

• [Config] Register all native configuration variables (3/3) (#8733)

Changes since 3.46.0

Summary

• [Profiler] Improve native unwinding performance and memory consumption on ARM64
• [Dynamic Instrumentation] Various performance improvements and bug fixes
• [Tracing] Fix OTLP traces being submitted to the wrong endpoint when an APM UDS socket is set
• Performance improvements and bug fixes.

Changes

Tracer

• Set TokenImpersonationLevel.Anonymous in NamedPipeClient (#8676)
• Remove libdatadog-based trace exporter (#8703)
• Use TaskScheduler.Default when calling Task.Factory.StartNew (#8779)

Continuous Profiler

• [Profiler] Try fixing crashes in etw events based profiler (#8673)
• [crashtracker] Libdatadog provides OS info (#8678)
• [Profiler] Improve native unwinding performance on arm64 (#8689)
• [Profiler] Fix coding issue (#8721)
• [Profiler] Investigating timer_create failure on arm64/alpine (#8744)
• [Profiler] fix flacky tests (#8745)
• [Profiler] Measure LibrariesInfoCache performance (#8757)
• Flaky test fixing (#8760)
• [Profiler] Improve memory consumption LibrariesInfoCache (#8777)

CI Visibility

• [CI Visibility] Fix Meta value length. (#8749)

Debugger

• [Debugger] Add memory pressure monitoring telemetry for Dynamic Instrumentation (observe-only) (#7834)
• [Dynamic Instrumentation] Rate limit condition evaluation error snapshots (#8725)
• [Dynamic Instrumentation] Omit capture data for condition evaluation errors (#8728)
• [Debugger] Fix probe file test waits (#8740)
• [Debugger] Improve no capture reason in collection serializer (#8746)
• [Debugger] Fix safe ToString handling for debugger collections (#8747)
• [Debugger] Improve debugger collection serialization (#8753)
• [Debugger] Avoid noisy async state machine metadata warnings (#8761)
• [Debugger] Redact dictionary values by sensitive keys (#8768)
• [Debugger] Minor Dynamic Instrumentation cleanups (#8770)
• [Debugger] Avoid evaluating expressionless snapshot probes (#8771)
• [Debugger] Avoid spurious timeout on empty collection serialization (#8741)

Fixes

• fix(otel): Submit OTLP traces to correct endpoint when APM UDS socket is set (#8668)
• [Native] Make GetTypeInfo Iterative to Prevent Native Stack Exhaustion (#8708)
• fix(dsm): use TaskScheduler.Default for ProcessQueueLoop to avoid deadlock (#8767)

Build / Test

• Update vendored OpenTelemetry.Exporter.OpenTelemetryProtocol (#8655)
• Handle dotnet/runtime#127957 in integration tests (#8665)
• Update more things to use artifacts output (#8680)
• Update launchSettings.json files: monitoring-home path (#8681)
• [Test Package Versions Bump] Updating package versions (#8715)
• [CI] Point serverless-tools trigger at main to fix monitoring-home path (#8726)
• Bump the gh-actions-packages group across 2 directories with 6 updates (#8734)
• Capture smoke tests container after error (#8748)
• No Clean before GeneratePackageVersions (#8752)
• [CI] Retry docker pull of ddapm-test-agent image on transient failure (#8755)
• [Test Package Versions Bump] Updating package versions (#8764)
• [Test Package Versions Bump] Updating package versions (#8772)
• Remove debugging blocks leaking environment variables in tests (#8781)
• [Tests] Stabilize memory pressure monitor race tests (#8751)

Miscellaneous

• [Crashtracker] Do not redact frames in crashtracker (#8675)
• [crashtracker] Remove Telemetry check (#8677)
• Update DirectSubmissionLogSink tests to be less flaky (#8714)
• Update OtlpSubmissionLogSink tests to be less flaky (#8718)
• [Config] Add scope field to all existing registry entries (1/3) (#8731)
• [Config] Add scope field infrastructure to configuration registry (2/3) (#8732)
• fix link to file in autoinstrumentation doc (#8738)
• Exclude InMemoryAssembly from dependency collection (#8759)
• [Stats] Fix partial_version exclusion: use >= 0 instead of > 0 (#8776)

Changes since 3.45.0

Summary

• [Tracing] Add experimental http/protobuf support for OTLP traces export (#8645)
• [AppSec] APPSEC-65483 Collect Datadog security-testing headers on entry spans (#8682)
• [Code Origin] DEBUG-4174 - Make Code Origin on by default (#8272)

Changes

Tracer

• [Tracing] Add experimental http/protobuf support for OTLP traces export (#8645)
• Handle invalid timestamps in Kafka consume integration (#8653)
• [Tracer] Tolerate clock skew when reparenting Activities to active Span (#8674)
• [Opentelemetry] Prevent OTLP array attribute stack overflow on cyclic/deep arrays (#8707)

CI Visibility

• [CI Visibility] propagate tests skipping enabled tag (#8582)
• Fix race condition in IpcTests (#8657)
• [CI Visibility] Fix coverage resolver assembly file locks (#8666)

ASM

• Fix ASM accessing HttpRequest.Headers on .NET Framework without guarding (#8611)
• Fix WAF Encoder child miscount bug (#8617)
• Refactor remote config for ASM to fix missing config (#8630)
• Fix off-by-one error in ASM Encoder (#8637)
• [AppSec] APPSEC-65483 Collect Datadog security-testing headers on entry spans (#8682)

Continuous Profiler

• [Profiler] Fix flacky tests possibly due to network errors (#8574)
• Load native loader in profiler via absolute path on Windows (#8646)
• [Profiler] Add Flaky attribute (#8648)
• [Profiler] Stop unwinding when unsafe (#8671)
• [Profiler] Add more context to timer_create call failure (#8686)

Debugger

• [SymDB] Increase SymDB upload batch default to 1MB (#8193)
• [Code Origin] DEBUG-4174 - Make Code Origin on by default (#8272)
• [Debugger] Add global rate limiter (#8480)
• [Dynamic Instrumentation] DEBUG-5101 line probe two segment fallback (#8543)
• [Debugger] Report retryable line probe resolution errors (#8603)
• fix(debugger): apply redaction to dictionary iterator key/value (#8641)
• [Debugger] Preserve EMITTING diagnostics across probe change (#8654)
• [SymDB] Stream SymDB payload (#8691)

Serverless

• [Serverless] Bump Datadog.Serverless.Compat to 1.6.0 (#8660)
• Prevent invalid JSON in AWS Lambda payloads (#8662)
• [Serverless] Bump Datadog.Serverless.Compat to 1.7.0 (#8692)

Build / Test

• Refactor DiscoveryService polling loop to allow less-flaky testing (#8601)
• Introduce Datadog.Trace.Build.g.sln to reduce size of artifacts copied between stages (#8610)
• Tag gitlab include refs as migration touchpoints (#8624)
• Fix kafka flakiness (#8629)
• Use ArtifactsOutput in more places in the tracer build (#8636)
• Serialize RuntimeIdTests and HttpHeaderHelperTests to remove telemetry header flake (#8638)
• [Test Package Versions Bump] Updating package versions (#8649)
• [Smoke Test Docker Image Bump] Updating docker image tags (#8650)
• Add some more owners to the nullability file (#8656)
• [Code Origin] Fix smoke test path mismatches on macOS and Windows IIS (#8659)
• [Test Package Versions Bump] Updating package versions (#8661)
• Allocate 2 CPUs per microbenchmark item (#8663)
• Exclude OpenTelemetry.Api from baseline files in PR comment (#8664)
• [Test Package Versions Bump] Updating package versions (#8683)
• [Build] Retry git clone in exploration tests setup (#8685)
• Increase integration_tests_linux Test job timeout to 90 minutes (#8699)
• [Test Package Versions Bump] Updating package versions (#8700)
• use https to download authanywhere binary (#8704)

Miscellaneous

• Ensure we wrap the process path in quotes before running it (#8613)
• chore(ci) update one-pipeline (#8687)
• Tweak BatchingSink to remove flake (#8696)
• [DBM] Add dynamic_service propagation mode (#8701)

Data Streams Monitoring

• [DSM] Guard against future timestamps when extracting pathway context (#8672)

Changes since 3.44.0

Summary

• [Continuous Profiler] Add experimental support for Linux ARM64
• [AAP] Fix body analysis on downstream requests causing stream-closed issues
• [Serverless] Add support for running multiple Azure Functions in the same Windows hosting plan
• [Data Streams Monitoring] Add produce-side checkpoints for Azure Service Bus
• [FFE] Update minimum required version of OpenFeature for Datadog.FeatureFlags.OpenFeature
• [Dynamic Instrumentation] Many fixes and performance improvements

Changes

Tracer

• Fix metrics for baggage extract (#8561)
• Skip sending errors to instrumentation telemetry for performance counter initialization (#8598)
• Add handling of OutOfMemoryException to runtime metrics polyfill (#8609)
• Switch Activity handling to use WeakReference<T> (#8549)
• Add a fixed cutoff for the activity handler reconcilliation loop for OTel (#8576)

CI Visibility

• Add Jenkins custom parent ID bypass (#8608)

ASM

• Fix IAST strings deferred enumerable (#8556)
• [AAP] Trace tagging rules (#8581)

Continuous Profiler

• [Profiler] Add support for ARM64 (#8338)
• [Profiler] Ensure valid json format for information json (#8578)
• [Profiler] Add guard-rails when creating a profile (#8579)

Debugger

• [SymDB] Defer SymDB startup work (#8548)
• Reapply "[SymDB] DEBUG-5086 SymDB upload enable when DI is disabled" (#8565)
• [Dynamic Instrumentation] Skip arg/local when byref-like check fails (#8566)
• [Debugger] Harden SnapshotPruner fallback handling (#8567)
• [Debugger] Treat Nullable as safe for snapshot ToString (#8568)
• [Debugger] Handle open generic types in probe expressions (#8569)
• [Debugger] Reuse singleton no-op symbol uploader (#8570)
• [Debugger Tests] Surface sample exit diagnostics during /stop cleanup (#8571)
• [Debugger] Fix flaky DI probe file test (#8575)
• [Debugger] Fix ConcurrentAdaptiveCache.GetOrAdd race that returned stale value (#8584)
• Remove allocation and delay in startup due to JSON parsing in Symbol uploader (#8589)
• Debugger: add upload metadata fields to SymDB upload event message (#8590)
• [Debugger] Reduce noisy Info logs to debug in native code (#8618)
• [Debugger] Fix Timer leaks and missing rate updates in probe rate limiter (#8619)
• [Debugger] DEBUG-4260 Add capture expression to log probe (#8621)
• fix(debugger): redact nullable wrappers of configured types (#8642)
• [Dynamic Instrumentation] Fix Equals/GetHashCode contract on Dynamic Instrumentation configuration models (#8615)
• [Code Origin] Reduce endpoint detector allocations (#8588)
• [Code Origin] Improve ASP.NET Core code origin endpoint detection (#8595)
• [Code Origin] Optimize per-assembly PDB cache (#8631)
• [Code Origin] Treat Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore as 3rd party (#8628)
• [Code Origin] Skip exit-span hook in Tracer.StartSpan (#8635)

Serverless

• Add Multi-Azure Function Unique Named Pipe Configuration (#8164)
• [Azure Functions] Update Datadog.Serverless.Compat version to 1.4.0 (#8563)
• [Serverless] Bump Datadog.Serverless.Compat to 1.5.0 (#8602)

Miscellaneous

• [Feature Flags] Add flag evaluation metrics via OpenFeature hook (#8367)
• [Runtime Metrics] Support for OTLP Runtime Metrics (#8457)

Data Streams Monitoring

• [DSM] Fix missing produce-side checkpoints for Azure Service Bus (#8433)

Build / Test

• Improve agents.md (#8554)
• Fix azure-functions skill YAML frontmatter parsing (#8583)
• AGENTS.md cleanup, round 2 (#8596)
• [SINT-5051] Update CI identities client version and Windows code signer to latest release (#8474)
• Allow building the Gitlab docker image in Gitlab (#8507)
• Ensure we always run all smoke tests on Docker tag bump PRs (#8514)
• Reduce warnings in test-applications samples (#8519)
• Add smoke tests for Ubuntu 26.04 (Resolute Racoon) (#8522)
• Decrease warnings part 3 (#8546)
• [SERVERLESS CI] use serverless-tools tags (#8551)
• Bump the gh-actions-packages group across 1 directory with 2 updates (#8552)
• [Test Package Versions Bump] Updating package versions (#8553)
• Retry microbenchmarks on non-compliant CPUs (#8558)
• Enable OpenTelemetry microbenchmarks (#8559)
• Don't run benchmark trigger on tag pushes (#8560)
• [Test Package Versions Bump] Updating package versions (#8564)
• [Libdatadog] Bump libdatadog + add SKILL.md to do it (#8580)
• [Test Package Versions Bump] Updating package versions (#8593)
• [Smoke Test Docker Image Bump] Updating docker image tags (#8594)
• [ASM Test] Add IIS CI coverage for WebApi null-action ASM test (#8597)
• Decrease warnings part 4 (#8599)
• chore(ci) update one-pipeline (#8600)
• Exclude OpenTelemetry.Api from benchmark PR comments (#8606)
• Use latest benchmark tooling image for macrobenchmark AMI build (#8625)
• [SINT-5051] Upgrade CI Identities GitLab Job Client version to v0.6.3 (#8627)
• [ASM Test] Mark WebApi null-action test as end-to-end (#8604)

Changes since 3.43.0

Summary

• Implement Client-Side Stats (CSS) 1.2.0 (#8420)
• [Azure Functions] Fix span parenting in ASP.NET Core integration (#7628)
• Performance improvements and bug fixes.

Changes

Tracer

• Bump Fody from 6.8.1 to 6.9.3 (#7764)
• Implement Client-Side Stats (CSS) 1.2.0 (#8420)
• Extract ContainsSpanId to SpanCollection (#8435)
• Fix processing pipeline for client-side-stats (#8436)
• Improve peer-tag calculation fast-path performance (#8445)
• Fix .NET Framework startup deadlock from configBuilder sync-over-async (#8498)
• Fix race condition in Client Side Stats enablement (#8509)
• Apply .cctor deadlock defense on .NET Core (follow-up to #8498) (#8517)
• Apply baggage limits on extract (#8555)

Continuous Profiler

• fix(profiler): five native profiler bug fixes (#8533)

Debugger

• [Dynamic Instrumentation] DEBUG-4089 Support file-based debugger probes (#7833)
• [SymDB] DEBUG-5086 SymDB upload enable when DI is disabled (#8510)
• [Dynamic instrumentation] DEBUG-3374 support @key and @value in EL hash iteration (#8511)
• [Dynamic Instrumentation] DEBUG-2387 Sample evaluation error snapshots (#8515)
• [Dynamic instrumentation] DEBUG-3321 Fix malformed local var sig parsing in PDB reader (#8532)
• [Dynamic Instrumentation] DEBUG-5104 support case-insensitive line probe source paths (#8542)
• [SymDB] DEBUG-5382 Add injectable line ranges to method scopes (#8544)
• Revert "[SymDB] DEBUG-5086 SymDB upload enable when DI is disabled" (#8550)

Serverless

• [Azure Functions] Fix span parenting in ASP.NET Core integration (#7628)

Fixes

• Fix broken parenting when Ocelot API Gateway is used (#8128)
• Fix OTLP HTTP/protobuf export failures and improve OTLP integration test reliability (#8449)
• Stop vendoring resx for vendored microsoft code (#8461)
• Fix warnings native (#8534)
• Do not send DD_GIT_COMMIT_SHA error to telemetry (#8537)
• Normalize CosmosDB resource URI IDs to reduce resource cardinality (#8541)

Build / Test

• Extract Datadog.AutoInstrumentation.Generator.Core shared library (#8312)
• Update vendored System.Collections.Immutable (#8391)
• Docker run retry (#8447)
• Use the built-in System.Reflection.Metadata types for .NET Core (#8454)
• Update vendored System.Reflection.Metadata (#8455)
• Update vendored System.Memory (#8459)
• Update vendored System.Runtime.CompilerServices.Unsafe (#8469)
• Move vendored ReadOnlySpan<T>, Span<T> et. al. to System namespace (#8476)
• Cleanup and fix the GeneratePackageVersions (#8478)
• [Test Package Versions Bump] Updating package versions (#8481)
• fix(microbenchmarks): restore CI Visibility reporting to Datadog (#8483)
• Skip SubmitsOtlpLogs and SubmitsOtlpMetrics (#8488)
• Add .NET service names to macrobenchmarks (#8490)
• Remove unused references to System.ServiceModelHttp (#8496)
• Update System.Text.Json to latest in source generators project (#8497)
• [Test Package Versions Bump] Updating package versions (#8502)
• Run the docker-compose version tagging update manually instead of using Dependabot (#8506)
• Try fix flake in OTLP logs tests (#8508)
• fix(ci): avoid branch-name command injection in image dispatch (#8513)
• Bump softprops/action-gh-release from 2.6.1 to 2.6.2 in the gh-actions-packages group across 1 directory (#8516)
• List the versions that changed in package-version-bump PRs (#8518)
• [Test Package Versions Bump] Updating package versions (#8520)
• [Smoke Test Docker Image Bump] Updating docker image tags (#8521)
• Bump check-azure-pipeline benchmark job timeout from 1h to 2h (#8523)
• Add Environment.Version to the banned API list (#8524)
• chore(ci) update one-pipeline (#8527)
• Update UpdateVendors tool to allow vendoring non-C# code (#8529)
• Update vendored spdlog library to 1.17.0 (latest) (#8530)
• unify the target to build integration tests across platforms (#8535)
• [Test Package Versions Bump] Updating package versions (#8540)
• Manually bump macrobenchmark SLOs and disable notifications (#8545)

Data Streams Monitoring

• [DSM] Expose TrackTransaction as a public manual API (#8440)
• DSM overhead optimizations (#8450)

Miscellaneous

• Take advantage of the Span<T> namespace changes (#8477)
• Update TagListGenerator to always useReadOnlySpan<byte> properties (#8486)
• Convert Encoding.Utf8.GetBytes calls to static constants using UTF8 string literals (#8487)
• Remove agent check in client-side-stats (#8503)
• Remove dependabot for instrumentations (#8504)

Changes since 3.42.0

Summary

• [CI Visibility] Add support for MSTest.Framework 4.2.1
• [DSM] Add support for transaction tracking
• [AAP] Add downstream request RASP analysis

Changes

CI Visibility

• [SDTEST-2993] Switch to paginated endpoint for retrieving known tests (#8380)
• fix(mstest): add 4.2.1 adapter signatures (#8475)

ASM

• [AAP] API10 downstream request analysis (#8232)

Continuous Profiler

• [Profiler] Bump to libunwind 1.8.3 (#8387)
• [Profiler] Prevent profiler from interrupted thread while executing handler SIGSEGV handler (#8465)
• [Profiler] Fix bug in ManagedCodeCache (#8467)
• [Profiler] Fix UB in DebugInfoStore::Get(): re-acquire iterator after map insertion (#8468)

Debugger

• [Dynamic Instrumentation] clarify unbound line probe diagnostics (#8415)
• [Dynamic Instrumentation] Improve line probe source path resolution (#8422)

Fixes

• fix user & host parsing in SQL connection string (#8431)
• Set resource name after exception in OnEndRequest method (#8439)
• Fix excessive allocation in vendored SharedArrayPool (#8442)
• Fix ServiceStack not calling EndRequest method (#8466)

Data Streams Monitoring

• [DSM] Initial transaction tracking implementation (#7949)

Build / Test

• Update microbenchmark design to reduce flakiness (#8300)
• Harden Linux Docker retries in CI (#8358)
• [Test Package Versions Bump] Updating package versions (#8414)
• Add managed-by:bp-infra tag and skip PR comments on master on benchmarking jobs (#8416)
• Enable performance quality gates on microbenchmarks and macrobenchmarks (#8424)
• Parametrize gitlab org (#8426)
• Update base image used in download stages (#8437)
• [Test Package Versions Bump] Updating package versions (#8441)
• [Coding Agents] Add HTTP REST API fallbacks for AzDO build analysis (#8448)
• Make microbenchmark post-processing steps non-fatal (#8452)
• Fix benchmark reporting (#8453)
• Move microbench AMI provision file into this repo, stop cloning benchmarking-platform (#8458)
• add new set of benchmarks (#8464)

Miscellaneous

• Add static char helpers like IsAsciiHexDigit (#8417)
• Fix EH clause sort to handle try-in-handler nesting (#8428)
• Add srv_src field to client stats payload (#8339)
• Add IpAddressObfuscationUtil for use with client-side-stats (#8418)

Changes since 3.41.0

Summary

• Switch Process tags on by default (#8296)
• [Tracing] Add support for DiagnosticSource (and Quartz) in .NET Framework (#7687)
• [Tracing] Add experimental support for exporting traces as OTLP (.NET 6+) (#8211)
• [Tracing] Update mapping from Datadog to OTLP spans (#8385)
• [DBM] Add container tags hash to queries (if enabled) (#8061)

Changes

Tracer

• Fix CA1872 - Prefer Convert.ToHexString over BitConverter.ToString (#8333)
• [Tracing] Add experimental support for exporting traces as OTLP (.NET 6+) (#8211)
• [Tracing] Update mapping from Datadog to OTLP spans (#8385)
• Revert YARP exclusion (#8407)

Serverless

• [Serverless] Cache serverless platform detection results (#8231)
• Add smoke tests for Datadog.AzureFunctions NuGet package (#8336)

Fixes

• Fix the integration name for several IAST Sqlite bytecode instrumentations (#8361)
• Set DD_TRACE_OTEL_ENABLED=true by default for all integration tests (#8370)
• Fix multiple termination signals on .NET 10+ (#8374)
• Move TracerSettings helper methods to TestHelpers project (#8375)
• Add potential fix for duck typing derived types (#8410)

Miscellaneous

• [Tracing] add support for DiagnosticSource (and Quartz) in .NET Framework (#7687)
• Skip some errors from being sent to telemetry (#8003)
• [DBM] Add container tags hash to queries (if enabled) (#8061)
• bump libdatadog version to v30 (#8282)
• Add _dd.p.ksr propagated tag for Knuth sampling rate (#8287)
• switch process tags on by default (#8296)
• Fix InvalidCastException in DefaultModelBindingContext (#8334)
• Enable CA1851 - Avoid multiple enumeration of collections (#8341)
• Use SpanCharSplitter for parsing source link URLs (#8349)
• feat: Stable Session ID headers for telemetry (#8352)
• Specify AGENTS.md to not edit generated files (#8359)
• Fix exception in Kafka on .NET Framework (#8366)
• Fix swapped SpanKinds and missing tags in IbmMqHelper (#8369)
• Configure GeneratePackageVersions to support a "cooldown" on dependencies (#8371)
• Add OTEL_RESOURCE_ATTRIBUTES to claude settings (#8378)
• chore(ci) update one-pipeline (#8403)

Build / Test

• Increase endpoint telemetry wait timeout (#8294)
• Enable CA1859 - Use concrete types when possible (#8335)
• chore(ci) update one-pipeline (#8351)
• Fix dd_dotnet.ArtifactTests.CreatedumpTests.DisableTelemetry flakiness (#8354)
• Fix dd-octo-sts trust policy for create-draft-release workflow (#8356)
• chore: disable automated dependency updater config [incident-51602] (#8364)
• Stabilize test-agent readiness in smoke tests (#8368)
• chore: re-enable dependabot with 2-day cooldown (#8377)
• Bump the gh-actions-packages group across 3 directories with 10 updates (#8381)
• Add hardcoded limits for OCI and libinjection packages (#8382)
• [Tests] Use [EnvironmentRestorer] to prevent env var leaks in tests (#8388)
• Pin floating pre-release versions of SQLitePCLRaw.* dependencies in samples (#8390)
• Delete the static analysis workflow (#8393)
• Bump the gh-actions-packages group across 2 directories with 5 updates (#8404)
• scrub process tags from debugger snapshots (#8406)
• [CI Tools] Add prerequisite validation to AzureDevOps helper scripts (#8409)
• maybe fix macos smoketests (#8413)

Changes since 3.40.0

Summary

• [Runtime Metrics] Enables Runtime Metrics by Default for .NET 6+ (#8267)
• [Tracing] Add interoperability between the Datadog Baggage API and the OpenTelemetry Baggage API (#7921)
• Add support for Microsoft.Data.SqlClient 7.x.x (#8346)

Changes

Tracer

• Refactor log directory resolution into smaller methods, add tests (#7255)
• Adjust Log levels in OltpExporter (#8133)
• [Metrics] Fixing sync-over-async patterns in DogStatsD Client Fork (#8265)
• Add _dd.svc_src meta tag to track service name source (#8274)
• Add process tags to service discovery (#8295)
• Add "manual" service source (#8302)
• ServiceNameSource for inferred proxy (#8309)

CI Visibility

• [CI Visibility] honor EFD retry mode over ATR (#8288)

Continuous Profiler

• [Profiler] Add unit tests for ManagedCodeCache (#8307)

Debugger

• [Dynamic Instrumentation] DEBUG-5317 fix snapshot stackoverflow in collection (#8310)
• [Dynamic Instrumentation] Add detailed diagnostics for line probe resolution (#8316)

Fixes

• More remote config performance improvements (#8241)
• WCF cleanup and trace context extraction (#8263)

Data Streams Monitoring

• Support adding kafka_cluster_id for Confluent.Kafka (#7702)
• [DSM] Include container tags hash in node hash calculation (#8163)

Miscellaneous

• [Tracing] Add interoperability between the Datadog Baggage API and the OpenTelemetry Baggage API (#7921)
• [Process Tags] Explicit whether the service name is the default one (#8106)
• Add an IArrayPool<char> implementation for vendored Newtonsoft.JSON (#8228)
• Use IArrayPool in more places for JSON (#8236)
• Remote configuration tests and performance improvements (#8237)
• Reduce payload size sent by agent in remote config (#8238)
• [Agent Skill] Rename to analyze-azdo-build, add retry support, and more (#8247)
• [Metrics] Send Diagnostics GC Pause Time as Counter instead of Timer (#8266)
• [Runtime Metrics] Enables Runtime Metrics by Default for .NET 6+ (#8267)
• Rename telemetry GetData methods to GetIncrementalData (#8269)
• Remove unnecessary use of duck typing in HTTP integrations (#8275)
• Exclude Otel for MongoDb 3.7 (#8279)
• Detect whether an app has been trimmed (#8281)
• [Agent Docs] Clean up AGENTS.md: fix stale reference, consolidate structure (#8290)
• Add some documentation on running system-tests (#8298)
• Update local smoke testing docs (#8311)
• [Tracer] Add Component Tag to Quartz Instrumentation (#8315)
• [AI Agents] Remove plugin settings from shared Claude Code config (#8343)
• Add support for Microsoft.Data.SqlClient 7.x.x (#8346)
• Attempt to fix macOS runner native build (#8348)

Build / Test

• (CI) Migrating benchmark-serverless CI job to short-lived tokens (#8219)
• Update Wix to 5.x.x (#8268)
• Allow generating a snapshot of the MSI contents (#8270)
• Move running of smoke tests to Nuke (#8271)
• Enable performance analyzers for Datadog.Trace (#8276)
• [Test Package Versions Bump] Updating package versions (#8278)
• Retry ChromeDriver startup in Selenium tests (#8284)
• Fix Datadog.Trace.Annotations dependency version in Datadog.AzureFunctions nuspec (#8285)
• Ban SetVersion/SetVersionPrefix/SetVersionSuffix in Nuke Build (#8289)
• Only allow creating hotfix branches from a tag (#8297)
• Bump test dependencies and add test.final_status to benchmark exporter (#8301)
• Update FeatureFlagsEvaluator and Debugger ToUUID to not violate CA1850 (#8303)
• [Test Package Versions Bump] Updating package versions (#8306)
• Relax concurrent TagsList stress test (#8317)
• Replace our custom GitHub App Token with dd-octo-sts (#8318)
• Fix GeneratePackageVersions so that it correctly respects IncludePackages and ExcludePackages (#8340)

Changes since 3.39.0