[jira] [Created] (SOLR-16938) Auto configure tracer without a tag in solr.xml

["Jan Høydahl (Jira)" <ji...@apache.org>]

Jan Høydahl created SOLR-16938:
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             Summary: Auto configure tracer without a <tracerConfig> tag in solr.xml
                 Key: SOLR-16938
                 URL: https://issues.apache.org/jira/browse/SOLR-16938
             Project: Solr
          Issue Type: Sub-task
          Components: tracing
            Reporter: Jan Høydahl


Spinoff from SOLR-16536. It should now be possible to get rid of the explicit {{<tracerConfig>}} config in solr.xml and the pluggable {{TracerConfigurator}} class which is initialized in {{CoreContainer}}.

Instead, the {{opentelemetry}} plugin can self-register statically to the global OTEL instance.  This will make it sufficient to enable the {{opentelemetry}} module to enable tracing. You can also [enable/disable|https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/] it with env {{OTEL_SDK_DISABLED}}.

Alternatively, if we are getting away with global instance (SOLR-16937), then SolrCore could discover the plugin using SPI or similar as opposed to explicit editing of solr.xml.



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