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https://issues.apache.org/jira/browse/SOLR-16532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17656259#comment-17656259
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David Smiley commented on SOLR-16532:
-------------------------------------

TestDistributedTracing is something I really like; particularly the 
"MockTracer" which is not a mock but an in-memory OpenTracing tracer 
implementation that tests can assert.  I'm dubious we need to truly test OTEL 
beyond a hello-world integration test; OTEL has its own tests surely ;-).  I 
hope the OTEL system has something similar to MockTracer, or else we can make 
one.  I think it's a killer feature useful for distributed systems / 
integration tests.  It should obsolete TrackingShardHandlerFactory.

> New OpenTelemetry module with OTLP trace exporter
> -------------------------------------------------
>
>                 Key: SOLR-16532
>                 URL: https://issues.apache.org/jira/browse/SOLR-16532
>             Project: Solr
>          Issue Type: Sub-task
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: tracing
>            Reporter: Jan Høydahl
>            Assignee: Jan Høydahl
>            Priority: Major
>             Fix For: 9.2
>
>          Time Spent: 8h 40m
>  Remaining Estimate: 0h
>
> This module can be added alongside the jaegertracer-configurator module.



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