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They are listed here separately on this page: Deprecations
Solr
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Last version before 9.0?
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Multi threaded search across multiple segments at once, using CollectorManagers
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10+ Roadmap
TBD: Ongoing discussion on Overseer vs Distributed State Updates. Efficient state updates.
Apache Curator; usage TBD.
OpenAPI: complete coverage.
Apache HttpClient no longer included with Solr; not a dependency of SolrJ either (will be an optional choice for some time maybe)
No longer in 10:
- Apache HttpClient
- Custom V2 API annotations/framework – use JAX-RS instead.
Solr 9x
Item | Description | Contributors | Theme | Jira |
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HTTP 1 → HTTP 2 | Switch the remaining HTTP 1 usage within Solr to HTTP 2. Apache HttpClient should no longer be used on the server. | Smiley | ||
Modularize SolrJ | SolrJ should be lighter-weight (smaller) for more users; fewer dependencies. Add modules for some dependencies and functionality. | Smiley, Jan, Houston, others | ||
Use JAX-RS | JAX-RS based V2 API definitions; use more and more. | Jason |
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Advanced Query parser and supporting lucene filters
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Solr 9.0
The theme of this release is to use Lucene 9.0 and to introduce some major frameworks.
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First party packages & Slim Solr distribution | Solr should have first party packages, and a slim Solr tarball that doesn't have the first party packages | Ishan, Noble, Jan, et. al. | Lean Solr Core |
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V2 API to be the default | Ref guide docs should use V2, where necessary we build V2 APIs, switch SolrJ to use V2 APIs, etc. | Usability | ||||||||||||||||||||||
Autoscaling / Replica assignment V2 | A new pluggable framework replaces current autoscaling | Andrzej, Ilan, Noble | Lean Solr Core |
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HDFS moved away from Solr-Core | Build a first party package out of HDFS support | Istvan Farkas, Gezapeti | Lean Solr Core | |||||||||||||||||||||
Remove Ant support | Tech-debt |
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Index Lifecycle Management | Automatically move indices between hot, warm and cold phases | Atri Sharma | Feature | |||||||||||||||||||||
POJOs instead of loosely typed objects | Start using POJOs/interfaces wherever possible in public APIs where ever possible | Noble Paul | ||||||||||||||||||||||
Remove Filter.java from Solr | Filter.java is a legacy relic from earlier Lucene days. Solr uses Filter in a variety of places where it can use other constructs or in some cases we need to make new constructs. In some cases like TwoPhaseIterator, this is an optimization. | David Smiley | Tech-debt |
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Solr 8.9
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Soon after 9.0. The main theme of this release is to solidify all the new frameworks.
This release may still depend on Lucene 9.0 if we wish.
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Last version before 9.0?
Item | Description | Contributors | Theme | Jira | ||||||||||
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Alternate SolrJ APIs without using NamedList/SimpleOrderedMap/Map | Get rid of concrete classes such as NamedList,SimpleOrderedMap, Map, etc and build our public APIs with interfaces | Noble Paul | Clean-API |
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New Cluster API | Standard set of APIs which consists of only interfaces. We should ensure that They are used wherever possible in server/client code. We should expose these interfaces to our plugins. They should be well -documented and we must always strive to maintain backward compatibility on these interfaces between versions | Noble Paul | Clean-API |
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New Remote Call API | Remote Calls should have simple constructs and they must be public interfaces. This should be used in all inter-node/client-server communications | Noble Paul | Clean-API |
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Multi-threaded search (SOLR-13350) | Multi threaded search across multiple segments at once, using CollectorManagers | Ishan Chattopadhyaya, Atri Sharma | Optimization |
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SIP-9 | Advanced Query parser and supporting lucene filters | Mike Nibeck (LOC contributor), Gus Heck | Feature |
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