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https://issues.apache.org/jira/browse/SOLR-15502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17372128#comment-17372128
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Christine Poerschke commented on SOLR-15502:
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Metrics collection is enabled by default but can be disabled as per
[https://solr.apache.org/guide/8_8/metrics-reporting.html#disabling-the-metrics-collection]
and per the
[https://github.com/apache/lucene-solr/blob/releases/lucene-solr/8.9.0/solr/core/src/java/org/apache/solr/core/CoreContainer.java#L762-L766]
code snippet I think no {{MetricsCollectorHandler}} object should be created
then and so the deprecation warning should go away.
But obviously that would disable metrics collection i.e. it does more than
disable metrics _history_ and that may not suit all use cases.
> 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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