[SOLR-16943] Tracing: cover more flows by moving instrumentation down to our HttpClient impls - ASF JIRA

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Details

Type: Improvement
Status: Open
Priority: Major
Resolution: Unresolved
Affects Version/s: None
Fix Version/s: None
Component/s: tracing
Labels:
None

Description

Instead of injecting tracing at HttpShardHandler & SolrCmdDistributor, go deeper at InstrumentedHttpListenerFactory, thereby covering more use-cases. A random example is org.apache.solr.update.processor.DistributedUpdateProcessor#fetchFullUpdateFromLeader which currently isn't traced.