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https://issues.apache.org/jira/browse/SOLR-12775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16616881#comment-16616881
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Alan Woodward commented on SOLR-12775:
--------------------------------------

Breaking schemas over a major version with no deprecation warnings means that 
you can't do a rolling upgrade.

> Add a deprecated implementation of LowerCaseTokenizer
> -----------------------------------------------------
>
>                 Key: SOLR-12775
>                 URL: https://issues.apache.org/jira/browse/SOLR-12775
>             Project: Solr
>          Issue Type: Task
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Alan Woodward
>            Priority: Blocker
>             Fix For: master (8.0)
>
>         Attachments: SOLR-12775.patch
>
>
> LUCENE-8498 will remove LowerCaseTokenizer and LowerCaseTokenizerFactory from 
> lucene 8.  To make upgrading from Solr 7.x to Solr 8 easier for users who 
> have schemas that use LowerCaseTokenizerFactory, we should add a deprecated 
> copy of the code to the {{org.apache.solr.analysis}} package.



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