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https://issues.apache.org/jira/browse/SOLR-5401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13808292#comment-13808292
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Jack Krupansky commented on SOLR-5401:
--------------------------------------
Solr has a logging admin API that will return recent log entries.
For example:
{code}
curl
"http://localhost:8983/solr/admin/logging?threshold=WARN&test&since=0&indent=true";
{code}
More examples and the API parameters are in the admin API section of my e-book
that is currently in progress, but that isn't out yet. The source code is
currently your best guide: org.apache.solr.handler.admin.LoggingHandler.
> In Solr's ResourceLoader, add a check for @Deprecated annotation in the
> plugin/analysis/... class loading code, so we print a warning in the log if a
> deprecated factory class is used
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-5401
> URL: https://issues.apache.org/jira/browse/SOLR-5401
> Project: Solr
> Issue Type: Improvement
> Components: Schema and Analysis
> Affects Versions: 3.6, 4.5
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: 4.6, 5.0
>
> Attachments: SOLR-5401.patch
>
>
> While changing an antique 3.6 schema.xml to Solr 4.5, I noticed that some
> factories were deprecated in 3.x and were no longer available in 4.x (e.g.
> "solr._Language_PorterStemFilterFactory"). If the user would have got a
> notice before, this could have been prevented and user would have upgraded
> before.
> In fact the factories were @Deprecated in 3.6, but the Solr loader does not
> print any warning. My proposal is to add some simple code to
> SolrResourceLoader that it prints a warning about the deprecated class, if
> any configuartion setting loads a class with @Deprecated warning. So we can
> prevent that problem in the future.
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