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Changelog

All notable changes to this project will be documented in this file.

The format is based on the Splunk GDI specification, and this repository adheres to Semantic Versioning.

Unreleased

v1.11.0 - 2022-05-18

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.14.0.
  • Micrometer dependency has been updated to version 1.9.0.
  • SignalFx metrics exporter has been updated to version 1.0.19.

Bugfixes

  • Fixed a bug where multiple Profiler instances on a single host would generate temporary files with the same name.

Enhancements

  • Implemented support for the splunk.realm configuration property, which allows easy configuration of exporter endpoints when sending data directly to the Splunk cloud.
  • Implemented internal stack trace filtering for the allocation profiler.

v1.10.2 - 2022-05-12

General

  • SignalFx metrics exporter has been updated to version 1.0.18.

v1.10.1 - 2022-04-26

General

  • OpenTelemetry Instrumentation for Java has been updated to version 1.13.1.

v1.10.0 - 2022-04-22

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.13.0.
  • Micrometer dependency has been updated to version 1.8.5.

Bugfixes

  • Fix NullPointerException on context tracking when JFR event on JDK 17 provides no thread - #743

Enhancements

  • Added host.name and container.id tags to Micrometer metrics - #726
  • Added support for exporting events in profiler in pprof format which can be enabled using the splunk.profiler.cpu.data.format setting - #684
  • Added profiler setting splunk.profiler.max.stack.depth to limit maximum depth of exported stack traces - #739

v1.9.1 - 2022-03-18

General

  • OpenTelemetry Instrumentation for Java has been updated to version 1.12.1.

Bugfixes

  • Fixed Elasticsearch rest client using high cardinality span name.
  • Fixed a possible deadlock.

v1.9.0 - 2022-03-14

General

  • OpenTelemetry Instrumentation for Java has been updated to version 1.12.0.

Bugfixes

  • Fix servlet instrumentation to prevent overwriting Server-Timing header for internal spans - #694

Enhancements

  • JvmHeapPressureMetrics are now part of exported JVM metrics - #686.
  • Size reduction for call stack payloads for profiling TLAB events - #687

v1.8.2 - 2022-02-22

Bugfixes

  • Fixed exporting histograms with fixed buckets.

v1.8.1 - 2022-02-21

General

  • OpenTelemetry Instrumentation for Java has been updated to version 1.11.1.

Bugfixes

  • Fixed regression in loading the Prometheus exporter.

v1.8.0 - 2022-02-15

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.11.0.

Deprecations

  • DEPRECATE splunk-otel-javaagent-all.jar use splunk-otel-javaagent.jar instead.

v1.7.3 - 2022-02-02

Bugfixes

  • Fixed a bug that caused JFR events to appear out of order.

v1.7.2 - 2022-01-31

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.10.1.

v1.7.1 - 2022-01-18

Bugfixes

  • Fixed the docker image publishing issue in GitLab.

v1.7.0 - 2022-01-17

General

  • Micrometer dependency has been updated to version 1.8.2.
  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.10.0.

Deprecations

  • DEPRECATE splunk.profiler.period.threaddump config setting in favor of GDI-spec compatible splunk.profiler.call.stack.interval.

Enhancements

  • Added a new splunk.profiler.memory.enabled property that enables all memory profiling features.
  • Implemented a sampler for allocation-related profiling events. It can be enabled by setting the splunk.profiler.memory.sampler.interval property. The default value is 1; set the value to 2 or higher to sample data every nth allocation event.

v1.6.1 - 2022-01-12

General

  • OpenTelemetry Instrumentation for Java has been updated to version 1.9.2.

Bugfixes

  • Fixed the connection leak in the reactor-netty upstream instrumentation.

v1.6.0 - 2021-12-01

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.9.1.
  • Micrometer dependency has been updated to version 1.8.0.

Bugfixes

  • Fix Tomcat thread pool metrics in Tomcat 10.
  • Disabled correlation by span links in messaging instrumentations. Now the PRODUCER-CONSUMER spans will always have parent-child relationship.

Enhancements

v1.5.0 - 2021-10-20

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.7.0.
  • Micrometer dependency has been updated to version 1.7.5.

Bugfixes

  • The Java agent no longer adds a security header to exported metrics when the SPLUNK_ACCESS_TOKEN is not configured. This means the agent should now work correctly with a collector that has token passthrough enabled.

Enhancements

  • We have added instrumentation for WebLogic thread pools. The agent now collects and exports metrics for the WebLogic application server thread pools.
  • We have also added instrumentation for Netty 4.1 that will add the server trace headers to the HTTP response.
  • This release introduces the Java profiler. Keep in mind this feature is still experimental, and thus turned off by default; you can enable it by setting the splunk.profiler.enabled property to true. Find out more about Splunk profiler in its docs.

v1.4.0 - 2021-09-20

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.6.0.
  • Micrometer dependency was updated to version 1.7.4.

v1.3.1 - 2021-08-27

  • OpenTelemetry Instrumentation for Java has been updated to version 1.5.2. This fixes the memory leak bug that manifested on 1.5.0 and 1.5.1 when OpenTelemetry metrics exporter wasn't used.

v1.3.0 - 2021-08-23

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.5.0.

Enhancements

  • Middleware attributes (middleware.name and middleware.version) have been renamed to webengine attributes (webengine.name and webengine.version) to follow the OpenTelemetry specification .
  • We have added instrumentations for c3p0 and Vibur DBCP connection pools. The agent now collects and exports metrics for both JDBC connection pools.
  • We have also introduced instrumentations for Tomcat connector and WebSphere Liberty web request thread pools. The agent now collects and exports metrics for these application server thread pools.
  • This release introduces the Micrometer bridge instrumentation. You can now use the Micrometer API inside your application to manually define custom metrics and the javaagent will export them. See the documentation for more details.
  • The splunk.metrics.export.interval configuration property will now allow specifying time units; and if no units are specified then the value is treated as number of milliseconds. For example 30s means "30 seconds" and is equivalent to 30000.
  • This release also introduces the muzzle safety checks to all Splunk instrumentations. Our instrumentations now offer exactly the same level of safety as the upstream OpenTelemetry instrumentations.

v1.2.0 - 2021-07-26

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies have been updated to version 1.4.0.

Enhancements

  • We have added instrumentation for HikariCP and Tomcat JDBC connection pools. The agent now collects and exports metrics for both JDBC connection pools.
  • You can now set the service name using the OTEL_SERVICE_NAME environment variable and the otel.service.name system property (see the OpenTelemetry specification . This removes the need of using OTEL_RESOURCE_ATTRIBUTES to set the service name.

v1.1.0 - 2021-06-18

General

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies were updated to version 1.3.0.
  • khttp instrumentation was moved from the upstream OpenTelemetry Instrumentation for Java repo to this one. We are now responsible for maintaining this instrumentation.

Bugfixes

  • The agent will always set exactly one Server-Timing header value; the bug where multiple copies of the same header value were set was fixed.

Enhancements

  • Added internal_root_off sampler that will drop all traces that start with INTERNAL, CLIENT or PRODUCER span - the only top-level span kinds allowed are SERVER and CONSUMER. You can use this sampler by setting the otel.traces.sampler configuration property.

v1.0.0 - 2021-06-02

General

  • First stable release of the Splunk Distribution of OpenTelemetry Java.

v0.12.0 (RC) - 2021-05-24

Breaking Changes

  • The metrics component will now be turned off by default. You can re-enable it by setting SPLUNK_METRICS_ENABLED to true.

Enhancements

  • The agent will now set a resource attribute splunk.distro.version with its own version.
  • The CloudFoundry buildpack file for Splunk Distribution of OpenTelemetry Java will now be built as a part of the release process and will be attached to the GitHub release.

v0.11.0 - 2021-05-17

General Notes

  • OpenTelemetry Java SDK and OpenTelemetry Instrumentation for Java dependencies were updated to version 1.2.0.
  • Micrometer dependency was updated to version 1.7.0.

Breaking Changes

  • The Splunk Distribution of OpenTelemetry Java now uses the OTLP span exporter as the default. The OTLP exporter supports the splunk.access.token configuration option and can be used to send spans directly to Splunk cloud. The default OTLP exporter endpoint is http://localhost:4317. You can still use the Jaeger exporter by setting OTEL_TRACES_EXPORTER=jaeger-thrift-splunk.
  • We have also changed the default endpoint of the SignalFx metrics exporter: it now points to http://localhost:9943, which is the default endpoint of Splunk OpenTelemetry Connector deployed on localhost.
  • The agent now uses W3C tracecontext as the default trace propagation mechanism; W3C Baggage is also enabled by default. You can switch to the previous B3 propagator by setting OTEL_PROPAGATORS=b3multi.
  • Deprecated configuration property splunk.context.server-timing.enabled has been removed. You can use splunk.trace-response-header.enabled instead.

Enhancements

  • The agent will now log a warning when the service.name resource attribute is not provided.

v0.10.0 - 2021-04-14

General Notes

  • Updated OpenTelemetry and OpenTelemetry Instrumentation for Java versions to 1.1.0.

Enhancements

  • The Splunk Distribution of OpenTelemetry Java now gathers basic application and JVM metrics. By default, this feature is enabled and is sending metrics to a SmartAgent instance running on localhost: you can change the endpoint by setting an appropriate configuration option. You can find a more detailed explanation about the feature here.
  • Add metrics for JDBC connection pool: Apache Commons DBCP2. Aside from JVM metrics mentioned above, the javaagent also collects Apache Commons DBCP2 connection pool metrics now.
  • Recommend using deployment.environment resource attribute instead of environment.
  • The SignalFx Java Agent migration guide has been brought up-to-date.
  • The repo README and documentation was significantly revamped. You'll now find much more information about the features and configuration of this project. We've also added a FAQ and troubleshooting sections that aim to answer the most common problems that may arise while using the Splunk Distribution of OpenTelemetry Java.

Breaking Changes

  • Removed the deprecated signalfx.auth.token configuration property: it was replaced by splunk.access.token in the previous release.

Deprecations

  • Configuration property splunk.context.server-timing.enabled was renamed to splunk.trace-response-header.enabled. The old property name still works, but it will be removed in the next release.

v0.9.0 - 2021-03-08

General Notes

  • Updated OpenTelemetry Instrumentation for Java versions to 1.0.0.

Deprecations

  • Property signalfx.auth.token has been renamed to splunk.access.token.

v0.8.0 - 2021-02-12

General Notes

  • Updated OpenTelemetry Instrumentation for Java versions to 0.16.1.

Enhancements

  • Instrument Netty 4.0 to add Server-Timing header.