# opentelemetry-java-instrumentation
**Repository Path**: lovnx/opentelemetry-java-instrumentation
## Basic Information
- **Project Name**: opentelemetry-java-instrumentation
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Apache-2.0
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-01-29
- **Last Updated**: 2021-02-05
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
---
Getting Started
•
Getting Involved
•
Getting In Touch
Contributing
•
Scope
•
Roadmap
---
#
OpenTelemetry Instrumentation for Java
This project provides a Java agent JAR that can be attached to any Java 8+
application and dynamically injects bytecode to capture telemetry from a
number of popular libraries and frameworks.
You can export the telemetry data in a variety of formats.
You can also configure the agent and exporter via command line arguments
or environment variables. The net result is the ability to gather telemetry
data from a Java application without code changes.
## Getting Started
Download the [latest version](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/latest/download/opentelemetry-javaagent-all.jar).
This package includes the instrumentation agent as well as
instrumentations for all supported libraries and all available data exporters.
The package provides a completely automatic, out-of-the-box experience.
Enable the instrumentation agent using the `-javaagent` flag to the JVM.
```
java -javaagent:path/to/opentelemetry-javaagent-all.jar \
-jar myapp.jar
```
By default, the OpenTelemetry Java agent uses
[OTLP exporter](https://github.com/open-telemetry/opentelemetry-java/tree/master/exporters/otlp)
configured to send data to
[OpenTelemetry collector](https://github.com/open-telemetry/opentelemetry-collector/blob/master/receiver/otlpreceiver/README.md)
at `http://localhost:4317`.
Configuration parameters are passed as Java system properties (`-D` flags) or
as environment variables. See below for a full list of environment variables. For example:
```
java -javaagent:path/to/opentelemetry-javaagent-all.jar \
-Dotel.trace.exporter=zipkin \
-jar myapp.jar
```
Specify the external exporter JAR file using the `otel.exporter.jar` system property:
```
java -javaagent:path/to/opentelemetry-javaagent-all.jar \
-Dotel.exporter.jar=path/to/external-exporter.jar \
-jar myapp.jar
```
Learn how to add custom instrumentation in the [Manually Instrumenting](#manually-instrumenting)
section.
## Configuration parameters (subject to change!)
Note: These parameter names are very likely to change over time, so please check
back here when trying out a new version! Please report any bugs or unexpected
behavior you find.
#### Exporters
The following configuration properties are common to all exporters:
| System property | Environment variable | Purpose |
|-----------------|----------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------|
| otel.trace.exporter | OTEL_TRACE_EXPORTER | The exporter to be used for tracing. Default is `otlp`. `none` means no exporter. |
| otel.metrics.exporter | OTEL_METRICS_EXPORTER | The exporter to be used for metrics. Default is `otlp`. `none` means no exporter. |
##### OTLP exporter (both span and metric exporters)
A simple wrapper for the OpenTelemetry Protocol (OTLP) span and metric exporters of opentelemetry-java.
| System property | Environment variable | Description |
|------------------------------|-----------------------------|---------------------------------------------------------------------------|
| otel.trace.exporter=otlp (default) | OTEL_TRACE_EXPORTER=otlp | Select the OpenTelemetry exporter for tracing (default) |
| otel.metrics.exporter=otlp (default) | OTEL_METRICS_EXPORTER=otlp | Select the OpenTelemetry exporter for metrics (default) |
| otel.exporter.otlp.endpoint | OTEL_EXPORTER_OTLP_ENDPOINT | The OTLP endpoint to connect to. Must be a URL with a scheme of either `http` or `https` based on the use of TLS. Default is `http://localhost:4317`. |
| otel.exporter.otlp.headers | OTEL_EXPORTER_OTLP_HEADERS | Key-value pairs separated by semicolons to pass as request headers |
| otel.exporter.otlp.timeout | OTEL_EXPORTER_OTLP_TIMEOUT | The maximum waiting time allowed to send each batch. Default is `1000`. |
To configure the service name for the OTLP exporter, add the `service.name` key
to the OpenTelemetry Resource ([see below](#opentelemetry-resource)), e.g. `OTEL_RESOURCE_ATTRIBUTES=service.name=myservice`.
##### Jaeger exporter
A simple wrapper for the Jaeger exporter of opentelemetry-java. This exporter uses gRPC for its communications protocol.
| System property | Environment variable | Description |
|-----------------------------------|-----------------------------------|----------------------------------------------------------------------------------------------------|
| otel.trace.exporter=jaeger | OTEL_TRACE_EXPORTER=jaeger | Select the Jaeger exporter |
| otel.exporter.jaeger.endpoint | OTEL_EXPORTER_JAEGER_ENDPOINT | The Jaeger gRPC endpoint to connect to. Default is `localhost:14250`. |
##### Zipkin exporter
A simple wrapper for the Zipkin exporter of opentelemetry-java. It sends JSON in [Zipkin format](https://zipkin.io/zipkin-api/#/default/post_spans) to a specified HTTP URL.
| System property | Environment variable | Description |
|-----------------------------------|-----------------------------------|-----------------------------------------------------------------------------------------------------------------------|
| otel.trace.exporter=zipkin | OTEL_TRACE_EXPORTER=zipkin | Select the Zipkin exporter |
| otel.exporter.zipkin.endpoint | OTEL_EXPORTER_ZIPKIN_ENDPOINT | The Zipkin endpoint to connect to. Default is `http://localhost:9411/api/v2/spans`. Currently only HTTP is supported. |
##### Prometheus exporter
A simple wrapper for the Prometheus exporter of opentelemetry-java.
| System property | Environment variable | Description |
|-------------------------------|-------------------------------|------------------------------------------------------------------------------------|
| otel.metrics.exporter=prometheus | OTEL_METRICS_EXPORTER=prometheus | Select the Prometheus exporter |
| otel.exporter.prometheus.port | OTEL_EXPORTER_PROMETHEUS_PORT | The local port used to bind the prometheus metric server. Default is `9464`. |
| otel.exporter.prometheus.host | OTEL_EXPORTER_PROMETHEUS_HOST | The local address used to bind the prometheus metric server. Default is `0.0.0.0`. |
##### Logging exporter
The logging exporter prints the name of the span along with its
attributes to stdout. It's mainly used for testing and debugging.
| System property | Environment variable | Description |
|------------------------------|------------------------------|------------------------------------------------------------------------------|
| otel.trace.exporter=logging | OTEL_TRACE_EXPORTER=logging | Select the logging exporter for tracing |
| otel.metrics.exporter=logging | OTEL_METRICS_EXPORTER=logging | Select the logging exporter for metrics |
| otel.exporter.logging.prefix | OTEL_EXPORTER_LOGGING_PREFIX | An optional string printed in front of the span name and attributes. |
#### Propagator
The propagators determine which distributed tracing header formats are used, and which baggage propagation header formats are used.
| System property | Environment variable | Description |
|------------------|----------------------|-----------------------------------------------------------------------------------------------------------------|
| otel.propagators | OTEL_PROPAGATORS | The propagators to be used. Use a comma-separated list for multiple propagators. Supported propagators are `tracecontext`, `baggage`, `b3`, `b3multi`, `jaeger`, `ottracer`, and `xray`. Default is `tracecontext,baggage` (W3C). |
#### OpenTelemetry Resource
The [OpenTelemetry Resource](https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/resource/sdk.md)
is a representation of the entity producing telemetry.
| System property | Environment variable | Description |
|--------------------------|--------------------------|------------------------------------------------------------------------------------|
| otel.resource.attributes | OTEL_RESOURCE_ATTRIBUTES | Specify resource attributes in the following format: key1=val1,key2=val2,key3=val3 |
#### Peer service name
The [peer service name](https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/trace/semantic_conventions/span-general.md#general-remote-service-attributes) is the name of a remote service being connected to. It corresponds to `service.name` in the [Resource](https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/resource/semantic_conventions#service) for the local service.
| System property | Environment variable | Description |
|------------------------------------|------------------------------------|----------------------------------------------------------------------------------|
| otel.endpoint.peer.service.mapping | OTEL_ENDPOINT_PEER_SERVICE_MAPPING | Used to specify a mapping from hostnames or IP addresses to peer services, as a comma-separated list of host=name pairs. The peer service is added as an attribute to a span whose host or IP match the mapping. For example, if set to 1.2.3.4=cats-service,dogs-abcdef123.serverlessapis.com=dogs-api, requests to `1.2.3.4` will have a `peer.service` attribute of `cats-service` and requests to `dogs-abcdef123.serverlessapis.com` will have an attribute of `dogs-api`. |
#### Batch span processor
| System property | Environment variable | Description |
|---------------------------|---------------------------|------------------------------------------------------------------------------------|
| otel.bsp.schedule.delay | OTEL_BSP_SCHEDULE_DELAY | The interval, in milliseconds, between two consecutive exports. Default is `5000`. |
| otel.bsp.max.queue.size | OTEL_BSP_MAX_QUEUE_SIZE | The maximum queue size. Default is `2048`. |
| otel.bsp.max.export.batch.size | OTEL_BSP_MAX_EXPORT_BATCH_SIZE | The maximum batch size. Default is `512`. |
| otel.bsp.export.timeout | OTEL_BSP_EXPORT_TIMEOUT | The maximum allowed time, in milliseconds, to export data. Default is `30000`. |
#### Trace config
| System property | Environment variable | Description |
|---------------------------------|---------------------------------|--------------------------------------------------------------|
| otel.trace.sampler | OTEL_TRACE_SAMPLER | The sampler to use for tracing. Defaults to `parentbased_always_on` |
| otel.trace.sampler.arg | OTEL_TRACE_SAMPLER_ARG | An argument to the configured tracer if supported, for example a ratio. |
| otel.span.attribute.count.limit | OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT | The maximum number of attributes per span. Default is `32`. |
| otel.span.event.count.limit | OTEL_SPAN_EVENT_COUNT_LIMIT | The maximum number of events per span. Default is `128`. |
| otel.span.link.count.limit | OTEL_SPAN_LINK_COUNT_LIMIT | The maximum number of links per span. Default is `32` |
Supported values for `otel.trace.sampler` are
- "always_on": AlwaysOnSampler
- "always_off": AlwaysOffSampler
- "traceidratio": TraceIdRatioBased. `otel.trace.sampler.arg` sets the ratio.
- "parentbased_always_on": ParentBased(root=AlwaysOnSampler)
- "parentbased_always_off": ParentBased(root=AlwaysOffSampler)
- "parentbased_traceidratio": ParentBased(root=TraceIdRatioBased). `otel.trace.sampler.arg` sets the ratio.
#### Interval metric reader
| System property | Environment variable | Description |
|--------------------------|--------------------------|-----------------------------------------------------------------------------------|
| otel.imr.export.interval | OTEL_IMR_EXPORT_INTERVAL | The interval, in milliseconds, between pushes to the exporter. Default is `60000`.|
##### Customizing the OpenTelemetry SDK
*Customizing the SDK is highly advanced behavior and is still in the prototyping phase. It may change drastically or be removed completely. Use
with caution*
The OpenTelemetry SDK exposes SPI [hooks](https://github.com/open-telemetry/opentelemetry-java/tree/main/sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/spi)
for customizing its behavior, such as the `Resource` attached to spans or the `Sampler`.
Because the automatic instrumentation runs in a different classpath than the instrumented application, it is not possible for customization in the application to take advantage of this customization. In order to provide such customization, you can provide the path to a JAR file, including an SPI implementation using the system property `otel.initializer.jar`. Note that this JAR needs to shade the OpenTelemetry API in the same way as the agent does. The simplest way to do this is to use the same shading configuration as the agent from [here](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/cfade733b899a2f02cfec7033c6a1efd7c54fd8b/java-agent/java-agent.gradle#L39). In addition, you must specify the `io.opentelemetry.javaagent.shaded.io.opentelemetry.api.trace.spi.TraceProvider` to the name of the class that implements the SPI.
## Manually instrumenting
> :warning: starting with 0.6.0, and prior to version 1.0.0, `opentelemetry-javaagent-all.jar`
only supports manual instrumentation using the `opentelemetry-api` version with the same version
number as the Java agent you are using. Starting with 1.0.0, the Java agent will start supporting
multiple (1.0.0+) versions of `opentelemetry-api`.
You'll need to add a dependency on the `opentelemetry-api` library to get started; if you intend to
use the `@WithSpan` annotation, also include the `opentelemetry-extension-annotations` dependency.
### Maven
```xml
io.opentelemetry
opentelemetry-api
0.15.0
io.opentelemetry
opentelemetry-extension-annotations
0.15.0
```
### Gradle
```groovy
dependencies {
implementation('io.opentelemetry:opentelemetry-api:0.15.0')
implementation('io.opentelemetry:opentelemetry-extension-annotations:0.15.0')
}
```
### Adding attributes to the current span
A common need when instrumenting an application is to capture additional application-specific or
business-specific information as additional attributes to an existing span from the automatic
instrumentation. Grab the current span with `Span.current()` and use the `setAttribute()`
methods:
```java
import io.opentelemetry.api.trace.Span;
// ...
Span span = Span.current();
span.setAttribute(..., ...);
```
### Creating spans around methods with `@WithSpan`
Another common situation is to capture a span around an existing first-party code method. The
`@WithSpan` annotation makes this straightforward:
```java
import io.opentelemetry.extension.annotations.WithSpan;
public class MyClass {
@WithSpan
public void MyLogic() {
<...>
}
}
```
Each time the application invokes the annotated method, it creates a span that denote its duration
and provides any thrown exceptions. Unless specified as an argument to the annotation, the span name
will be `.`.
#### Suppressing `@WithSpan` instrumentation
Suppressing `@WithSpan` is useful if you have code that is over-instrumented using `@WithSpan`
and you want to suppress some of them without modifying the code.
| System property | Environment variable | Purpose |
|---------------------------------|---------------------------------|------------------------------------------------------------------------------------------------------------------------------------------|
| trace.annotated.methods.exclude | TRACE_ANNOTATED_METHODS_EXCLUDE | Suppress `@WithSpan` instrumentation for specific methods.
Format is "my.package.MyClass1[method1,method2];my.package.MyClass2[method3]" |
### Creating spans manually with a Tracer
OpenTelemetry offers a tracer to easily enable custom instrumentation throughout your application.
See the [OpenTelemetry Java
QuickStart](https://github.com/open-telemetry/opentelemetry-java/blob/master/QUICKSTART.md#tracing)
for an example of how to configure the tracer and use the Tracer, Scope and Span interfaces to
instrument your application.
## Supported libraries, frameworks, and application servers
These are the supported libraries and frameworks:
| Library/Framework | Versions |
|---------------------------------------------------------------------------------------------------------------------------------------|--------------------------------|
| [Akka HTTP](https://doc.akka.io/docs/akka-http/current/index.html) | 10.0+ |
| [Apache HttpAsyncClient](https://hc.apache.org/index.html) | 4.1+ |
| [Apache HttpClient](https://hc.apache.org/index.html) | 2.0+ |
| [Apache Wicket](https://wicket.apache.org/) | 8.0+ |
| [Armeria](https://armeria.dev) | 1.3+ |
| [AsyncHttpClient](https://github.com/AsyncHttpClient/async-http-client) | 1.9+ (not including 2.x yet) |
| [AWS Lambda](https://docs.aws.amazon.com/lambda/latest/dg/java-handler.html) | 1.0+ |
| [AWS SDK](https://aws.amazon.com/sdk-for-java/) | 1.11.x and 2.2.0+ |
| [Cassandra Driver](https://github.com/datastax/java-driver) | 3.0+ |
| [Couchbase Client](https://github.com/couchbase/couchbase-java-client) | 2.0+ (not including 3.x yet) |
| [Dropwizard Views](https://www.dropwizard.io/en/latest/manual/views.html) | 0.7+ |
| [Elasticsearch API](https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/index.html) | 5.0+ (not including 7.x yet) |
| [Elasticsearch REST Client](https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/index.html) | 5.0+ |
| [Finatra](https://github.com/twitter/finatra) | 2.9+ |
| [Geode Client](https://geode.apache.org/) | 1.4+ |
| [Google HTTP Client](https://github.com/googleapis/google-http-java-client) | 1.19+ |
| [Grizzly](https://javaee.github.io/grizzly/httpserverframework.html) | 2.0+ (disabled by default) |
| [gRPC](https://github.com/grpc/grpc-java) | 1.5+ |
| [Hibernate](https://github.com/hibernate/hibernate-orm) | 3.3+ |
| [HttpURLConnection](https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/net/HttpURLConnection.html) | Java 7+ |
| [http4k †](https://www.http4k.org/guide/modules/opentelemetry/) | 3.270.0+ |
| [Hystrix](https://github.com/Netflix/Hystrix) | 1.4+ |
| [JAX-RS](https://javaee.github.io/javaee-spec/javadocs/javax/ws/rs/package-summary.html) | 0.5+ |
| [JAX-RS Client](https://javaee.github.io/javaee-spec/javadocs/javax/ws/rs/client/package-summary.html) | 2.0+ |
| [JAX-WS](https://jakarta.ee/specifications/xml-web-services/2.3/apidocs/javax/xml/ws/package-summary.html) | 2.0+ (not including 3.x yet) |
| [JDBC](https://docs.oracle.com/en/java/javase/11/docs/api/java.sql/java/sql/package-summary.html) | Java 7+ |
| [Jedis](https://github.com/xetorthio/jedis) | 1.4+ |
| [JMS](https://javaee.github.io/javaee-spec/javadocs/javax/jms/package-summary.html) | 1.1+ |
| [JSP](https://javaee.github.io/javaee-spec/javadocs/javax/servlet/jsp/package-summary.html) | 2.3+ |
| [Kafka](https://kafka.apache.org/20/javadoc/overview-summary.html) | 0.11+ |
| [khttp](https://khttp.readthedocs.io) | 0.1+ |
| [Kubernetes Client](https://github.com/kubernetes-client/java) | 7.0+ |
| [Lettuce](https://github.com/lettuce-io/lettuce-core) | 4.0+ (not including 6.x yet) |
| [Log4j 1](https://logging.apache.org/log4j/1.2/) | 1.2+ |
| [Log4j 2](https://logging.apache.org/log4j/2.x/) | 2.7+ |
| [Logback](http://logback.qos.ch/) | 1.0+ |
| [Mojarra](https://projects.eclipse.org/projects/ee4j.mojarra) | 1.2+ (not including 3.x yet) |
| [MongoDB Drivers](https://mongodb.github.io/mongo-java-driver/) | 3.3+ |
| [MyFaces](https://myfaces.apache.org/) | 1.2+ (not including 3.x yet) |
| [Netty](https://github.com/netty/netty) | 3.8+ |
| [OkHttp](https://github.com/square/okhttp/) | 3.0+ |
| [Play](https://github.com/playframework/playframework) | 2.3+ (not including 2.8.x yet) |
| [Play WS](https://github.com/playframework/play-ws) | 1.0+ |
| [RabbitMQ Client](https://github.com/rabbitmq/rabbitmq-java-client) | 2.7+ |
| [Ratpack](https://github.com/ratpack/ratpack) | 1.4+ |
| [Reactor](https://github.com/reactor/reactor-core) | 3.1+ |
| [Reactor Netty](https://github.com/reactor/reactor-netty) | 0.9+ (not including 1.0) |
| [Rediscala](https://github.com/etaty/rediscala) | 1.8+ |
| [Redisson](https://github.com/redisson/redisson) | 3.0+ |
| [RMI](https://docs.oracle.com/en/java/javase/11/docs/api/java.rmi/java/rmi/package-summary.html) | Java 7+ |
| [RxJava](https://github.com/ReactiveX/RxJava) | 1.0+ |
| [Servlet](https://javaee.github.io/javaee-spec/javadocs/javax/servlet/package-summary.html) | 2.2+ (not including 5.x yet) |
| [Spark Web Framework](https://github.com/perwendel/spark) | 2.3+ |
| [Spring Batch](https://spring.io/projects/spring-batch) | 3.0+ |
| [Spring Data](https://spring.io/projects/spring-data) | 1.8+ |
| [Spring Scheduling](https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/scheduling/package-summary.html) | 3.1+ |
| [Spring Web MVC](https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/servlet/mvc/package-summary.html) | 3.1+ |
| [Spring Webflux](https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/reactive/package-summary.html) | 5.0+ |
| [Spring Web Services](https://spring.io/projects/spring-ws) | 2.0+ |
| [Spymemcached](https://github.com/couchbase/spymemcached) | 2.12+ |
| [Struts2](https://github.com/apache/struts) | 2.3+ |
| [Twilio](https://github.com/twilio/twilio-java) | 6.6+ (not including 8.x yet) |
| [Vert.x](https://vertx.io) | 3.0+ |
| [Vert.x RxJava2](https://vertx.io/docs/vertx-rx/java2/) | 3.5+ |
† OpenTelemetry support provided by the library
These are the supported application servers:
| Application server | Version | JVM | OS |
| ----------------------------------------------------------------------------------------- | --------------------------- | ---------------- | ------------------------------ |
| [Glassfish](https://javaee.github.io/glassfish/) | 5.0.x, 5.1.x | OpenJDK 8, 11 | Ubuntu 18, Windows Server 2019 |
| [JBoss EAP](https://www.redhat.com/en/technologies/jboss-middleware/application-platform) | 7.1.x, 7.3.x | OpenJDK 8, 11 | Ubuntu 18, Windows Server 2019 |
| [Jetty](https://www.eclipse.org/jetty/) | 9.4.x, 10.0.x, 11.0.x | OpenJDK 8, 11 | Ubuntu 20 |
| [Payara](https://www.payara.fish/) | 5.0.x, 5.1.x | OpenJDK 8, 11 | Ubuntu 18, Windows Server 2019 |
| [Tomcat](http://tomcat.apache.org/) | 7.0.x, 8.5.x, 9.0.x, 10.0.x | OpenJDK 8, 11 | Ubuntu 18 |
| [TomEE](https://tomee.apache.org/) | 7.x, 8.x | OpenJDK 8, 11 | Ubuntu 18 |
| [Weblogic](https://www.oracle.com/java/weblogic/) | 12 | Oracle JDK 8 | Oracle Linux 7, 8 |
| [Weblogic](https://www.oracle.com/java/weblogic/) | 14 | Oracle JDK 8, 11 | Oracle Linux 7, 8 |
| [Websphere Liberty Profile](https://www.ibm.com/cloud/websphere-liberty) | 20.0.0.12 | OpenJDK 8, 11 | Ubuntu 18, Windows Server 2019 |
| [WildFly](https://www.wildfly.org/) | 13.0.x | OpenJDK 8 | Ubuntu 18, Windows Server 2019 |
| [WildFly](https://www.wildfly.org/) | 17.0.1, 21.0.0 | OpenJDK 8, 11 | Ubuntu 18, Windows Server 2019 |
### Disabled instrumentations
Some instrumentations can produce too many spans and make traces very noisy.
For this reason, the following instrumentations are disabled by default:
- `jdbc-datasource` which creates spans whenever the `java.sql.DataSource#getConnection` method is called.
To enable them, add the `otel.instrumentation..enabled` system property:
`-Dotel.instrumentation.jdbc-datasource.enabled=true`
#### Grizzly instrumentation
When you use
[Grizzly](https://javaee.github.io/grizzly/httpserverframework.html) for
Servlet-based applications, you get better experience from Servlet-specific
support. As these two instrumentations conflict with each other, more generic
instrumentation for Grizzly HTTP server is disabled by default. If needed,
you can enable it by adding the following system property:
`-Dotel.instrumentation.grizzly.enabled=true`
### Suppressing specific auto-instrumentation
See [Suppressing specific auto-instrumentation](docs/suppressing-instrumentation.md)
### Logger MDC auto-instrumentation
See [Logger MDC auto-instrumentation](docs/logger-mdc-instrumentation.md)
## Troubleshooting
To turn on the agent's internal debug logging:
`-Dotel.javaagent.debug=true`
**Note**: These logs are extremely verbose. Enable debug logging only when needed.
Debug logging negatively impacts the performance of your application.
## Roadmap to 1.0 (GA)
See [GA Requirements](docs/ga-requirements.md)
## Contributing
See [CONTRIBUTING.md](CONTRIBUTING.md).
Approvers ([@open-telemetry/java-instrumentation-approvers](https://github.com/orgs/open-telemetry/teams/java-instrumentation-approvers)):
- [John Watson](https://github.com/jkwatson), Splunk
- [Mateusz Rzeszutek](https://github.com/mateuszrzeszutek), Splunk
- [Pavol Loffay](https://github.com/pavolloffay), Traceable.ai
Maintainers ([@open-telemetry/java-instrumentation-maintainers](https://github.com/orgs/open-telemetry/teams/java-instrumentation-maintainers)):
- [Anuraag Agrawal](https://github.com/anuraaga), AWS
- [Nikita Salnikov-Tarnovski](https://github.com/iNikem), Splunk
- [Trask Stalnaker](https://github.com/trask), Microsoft
- [Tyler Benson](https://github.com/tylerbenson), DataDog
Learn more about roles in the [community repository](https://github.com/open-telemetry/community/blob/master/community-membership.md).
Thanks to all the people who already contributed!