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Not started; may need discussion

• OpenTelemetry for Metrics instead of DropWizard.  Attribute based; supports pushing metrics thus avoiding Prometheus translation
• Segment level filterCache, augmenting or replacing current global strategy
• Limit concurrent HTTP requests / threads to a sane value, not 10k in jetty.xml.  Not trivial; don't want to dead-lock at scale.  Related (but not the same) issue:

  Jira
  server ASF JIRA serverId 5aa69414-a9e9-3523-82ec-879b028fb15b key SOLR-7344

• schema.xml:  Default field types (esp. for non-text) so users needn't define the basics.
• Transition from "javabin" to CBOR via Jackson.  Status of CBOR –

  Jira
  server ASF JIRA serverId 5aa69414-a9e9-3523-82ec-879b028fb15b key SOLR-17510

• Load built-in and other plugins via Java java.util.ServiceLoader / SPI, just like how Lucene components are loaded.
• SolrJ/Solr Backwards-compatibility tests.  Should work via Docker/TestContainers.  See SOLR-17653
• Cloud/remote storage via Java NIO FileSystem –

  Jira
  server ASF JIRA serverId 5aa69414-a9e9-3523-82ec-879b028fb15b key SOLR-17646

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• End-state is to merge solrj-zookeeper into solr-core.
• End-state: most of Solr's tests that call waitForState after collection creation can finally stop doing so
• ClusterStateProvider and CloudSolrClient may need some love.
  • performance issues are fixed already (9.8)
  • deficiency if all Solr nodes go down; easy fix
  • assumptions about ClusterState; API issues
• Prometheus Exporter should use it.

OpenTelemetry for Metrics instead of DropWizard. SIP-23 &

Package Manager

• First Party Packages:  status: needs a SIP (proposal/design) –

  Jira
  server ASF JIRA serverId 5aa69414-a9e9-3523-82ec-879b028fb15b key SOLR-14688

  also see linked items, some with PRs

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