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https://issues.apache.org/jira/browse/OAK-9261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17221383#comment-17221383
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Thomas Mueller commented on OAK-9261:
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So right now, the Oak 1.4 and 1.6 branch don't compile with Java 7, due to
"UnsupportedClassVersionError: org/apache/solr/client/solrj/SolrClient :
Unsupported major.minor version 52.0".
Given that Java 7 is EOL, I'm not sure if that's a problem or not. People might
still use Oak 1.4 and 1.6 with Java 8, and I think it's more important to
support that case than to support Java 7. People that still use Java 7
obviously don't need a new Solr version.
> Upgrade Apache Solr to 8.6.3 and remove Embedded Solr Server
> ------------------------------------------------------------
>
> Key: OAK-9261
> URL: https://issues.apache.org/jira/browse/OAK-9261
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: query, solr
> Reporter: Thomas Mueller
> Assignee: Thomas Mueller
> Priority: Major
> Fix For: 1.6.21, 1.4.27, 1.8.24, 1.36.0, 1.22.6
>
>
> We are currently using a relatively old version of Apache Solr.
> I will try upgrading to the latest stable version, 8.6.3
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