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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