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https://issues.apache.org/jira/browse/SOLR-15502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17370644#comment-17370644
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Cassandra Targett commented on SOLR-15502:
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The documentation for 8.9 is at
https://solr.apache.org/guide/8_9/solr-upgrade-notes.html. It mentions that the
Metrics History feature has been deprecated.
{quote}
I also think link to the documentation in the release notes has changed/is
broken:
https://github.com/apache/lucene-solr/blob/master/solr/solr-ref-guide/src/solr-upgrade-notes.adoc
=>
https://gitbox.apache.org/repos/asf?p=solr.git;a=blob;f=solr/solr-ref-guide/src/solr-upgrade-notes.adoc
{quote}
I'm not totally clear what you're looking for here, but the first link is to
the "old" GitHub repo, from before the Lucene and Solr projects split a few
months ago. This repo now only holds the branches for 8.x Lucene and Solr
releases (9.0 will be the first release from the split repos). In order to
avoid confusion, all code for the "{{master}}" branch has been removed; the 8.x
code line is in "{{branch_8x}}", with 8.9 specifically in "{{branch_8_9}}". So
the page you're looking for for 8.9 is at
https://github.com/apache/lucene-solr/blob/branch_8_9/solr/solr-ref-guide/src/solr-upgrade-notes.adoc.
But the page is published on the Solr website in the link I gave above, so not
clear why you need to find the page in the source code.
Solr's "{{main}}" branch (renamed from "{{master}}", and what will be 9.0) has
moved to https://github.com/apache/solr.
As for the warning itself, there isn't a way to replace metrics history so I'm
not sure why the message says to consult documentation; for now you should just
ignore the warning and in 9.0 it will be removed and will go away.
> MetricsCollectorHandler deprecated warning (missing documentation)
> ------------------------------------------------------------------
>
> Key: SOLR-15502
> URL: https://issues.apache.org/jira/browse/SOLR-15502
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: documentation
> Affects Versions: 8.9
> Reporter: Bernd Wahlen
> Priority: Minor
>
> after upgrading from 8.8.2 to 8.9.0 i got the following warning:
> MetricsCollectorHandler
> Solr loaded a deprecated plugin/analysis class
> [org.apache.solr.handler.admin.MetricsCollectorHandler]. Please consult
> documentation how to replace it accordingly.
> i found the corresponding change:
> https://solr.apache.org/docs/8_9_0/changes/Changes.html#v8.9.0.other_changes
> SOLR-15416
> but not how to solve it (documenaton mentioned above in the warning is
> missing).
> I also think link to the documentation in the release notes has changed/is
> broken:
> https://github.com/apache/lucene-solr/blob/master/solr/solr-ref-guide/src/solr-upgrade-notes.adoc
> =>
> https://gitbox.apache.org/repos/asf?p=solr.git;a=blob;f=solr/solr-ref-guide/src/solr-upgrade-notes.adoc
> but cannot find how to solve that warning here also.
> I grep my configs but can't find anything related.
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