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https://issues.apache.org/jira/browse/SOLR-12809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16629257#comment-16629257
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Shawn Heisey commented on SOLR-12809:
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My thoughts, implement or ignore as you see fit:
It will be interesting to see how Java fares as a viable platform, especially
for open source, as Oracle makes it harder and harder to use Java without
paying.
Next year when Oracle puts all support for Java 8 behind a pay wall, it's going
to be a problem if users can't use Java 11 to run Lucene-based software like
Solr. We will need to have any problems we currently have fixed by then.
Dependencies like Hadoop face a similar situation, we will need to be prepared
to upgrade to new versions of those dependencies.
I think we should explicitly recommend OpenJDK for Lucene/Solr. Before now, I
have always recommended Oracle Java, and said that OpenJDK (as long as it's 7
or later and compatible with the specific Solr version) should work well. With
Oracle requiring a paid license for production use of their Java 11
implementation, I don't think we can recommend it.
> Upgrading to a more recent Java (JDK 11?)
> -----------------------------------------
>
> Key: SOLR-12809
> URL: https://issues.apache.org/jira/browse/SOLR-12809
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Erick Erickson
> Priority: Major
>
> JDK 8 will be EOL early next year (except for "premier support"). JDK 9, 10
> and 11 all have issues for Solr and Lucene IIUC.
> Also IIUC Oracle will start requiring commercial licenses for 11.
> This Jira is to discuss what we want to do going forward. Among the topics:
> * Skip straight to 11, skipping 9 and 10? If so how to resolve current
> issues?
> * How much emphasis on OpenJDK .vs. Oracle's version
> * What to do about dependencies that don't work (for whatever reason) with
> the version of Java we go with?
> * ???
> This may turn into an umbrella Jira with sub-tasks of course. Since JDK 11
> has had a GA release, I'd also like to have a record of where the current
> issues are to refer people to.
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