Apache HTTPd Tracer releases

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Instana monitors your Apache HTTPd environment by using the Apache HTTPd sensor and tracer. The Apache HTTPd sensor provides infrastructure metrics, while the Apache HTTPd Tracer provides automated code instrumentation and tracing data across your environment.

For more information, see Monitoring Apache HTTPd.

Release 1.1.3

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Apache HTTPd Tracer 1.1.3 is released on 14 October 2025.

To get the following updates, update the Apache HTTPd sensor to 1.2.31 or later and update the Instana agent configuration.yaml file as follows:

com.instana.plugin.httpd:
  tracing: 
    pinModuleVersion: 1.1.3

Improvements

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The Apache HTTPd Tracer can now read the INSTANA_AGENT_HOST environment variable even when dem.conf is not available.

Fixes

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This release fixes the following issues:

  • Intense logging of successful Instana agent discovery in debug log level is now fixed by hiding the messages unless the INSTANA_LOG_DISCOVERY environment variable is set to true.
  • EUM handling now aggressively switches to chunk encoding when a matching EUM configuration and content type are found.

Release 1.1.2

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Apache HTTPd Tracer 1.1.2 is released on 30 July 2025.

It is not available on IBM System Z Linux.

To get the following updates, update the Apache HTTPd sensor to 1.2.28 or later and update the Instana agent configuration.yaml file as follows:

com.instana.plugin.httpd:
  tracing: 
    pinModuleVersion: 1.1.2

Release 1.1.1

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Apache HTTPd Tracer 1.1.1 is released on 14 March 2025.

To get the following updates, update the Apache HTTPd sensor to 1.2.21 or later.

Improvements

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This release provides the following enhancements:

  • The logging mechanism is enhanced to provide more debug information for failed discovery requests to the Instana agent.
  • The logging of span request errors is stopped if the environment variable INSTANA_LOG_SPANS is not set to true and LOG_LEVEL is not set to debug.

Fixes

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Windows compatibility issue in Apache HTTPd Tracer 1.1.0 is now fixed.

Release 1.1.0

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Apache HTTPd Tracer 1.1.0 is released on 22 November 2024.

It is not available on Windows. The Windows support will be fixed in the next release.

To get the following improvements, update the Apache HTTPd sensor to 1.2.20 or later and set pinModuleVersion: 1.1.0 in the Instana agent configuration com.instana.plugin.httpd - tracing.

Improvements

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  • Reduce CPU load through proper Instana agent discovery delays
  • Handle exceptions when the tracer configuration file (dem.conf) is not found
  • Prefix all log messages with "[INSTANA] "
  • Log an error if the agent library (tracelib) cannot be found or loaded

Release 1.0.20

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Apache HTTPd Tracer 1.0.20 is released on 01 August 2024.

To get the following features, update the Apache HTTPd sensor to 1.2.19 or later.

Features

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HTTPd Tracing now enables autoPageDetection support with titleAsPageName by default in website automatic instrumentation.

Release 1.0.19

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Apache HTTPd Tracer 1.0.19 is released on 25 April 2024.

To get the following fixes, update the Apache HTTPd sensor to 1.2.17 or later.

Fixes

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Previously, the instrumented HTML was truncated because the HTTP response header Content-Length was less than the actual length of the instrumented HTML. This issue is now fixed.

Release 1.0.18

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Apache HTTPd Tracer 1.0.18 is released on 08 March 2024.

To get the following features, update the Apache HTTPd sensor to 1.2.15 or later.

Features

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HTTPd Tracing now supports IBM HTTP Server on zLinux.