This documentation has an index for AI agents at /llms.txt. A Markdown version of this page is available at https://explorer.opentelemetry.io/java-agent/instrumentation/log4j-appender-1.2.md.

Log4j

OpenTelemetry Java agent instrumentation

This instrumentation bridges Log4j log events to OpenTelemetry logs.

Name: log4j-appender-1.2
Scope: io.opentelemetry.log4j-appender-1.2
Target versions: log4j:log4j:[1.2,)
Library: https://logging.apache.org/log4j/1.2/

Configuration

Option	Type	Default	Description
`otel.instrumentation.log4j-appender.experimental-log-attributes`	boolean	false	Enables the capture of experimental log attributes, including thread name and thread ID.
`otel.instrumentation.log4j-appender.experimental.capture-code-attributes`	boolean	false	Enables the capture of code location attributes, including file path, class name, method name, and line number.
`otel.instrumentation.log4j-appender.experimental.capture-mdc-attributes`	list		Controls which MDC attributes to capture. Use "*" to capture all MDC attributes or provide a comma-separated list of specific keys.

Data

JSON: /data/javaagent/instrumentations/log4j-appender-1.2/log4j-appender-1.2-efb6f9340880.json
Explore: /java-agent/instrumentation/log4j-appender-1.2