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https://issues.apache.org/jira/browse/SOLR-5931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13955085#comment-13955085
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Gunnlaugur Thor Briem commented on SOLR-5931:
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I can't say for sure whether this worked earlier (I only just started to use
solrcore.properties to control this, at the same time as I was upgrading
exactly like Gary, from 3.5 to 4.7).
In any case, I do consider it a bug, even if only in the sense of “violating
the principle of least astonishment.” : ) Applying configuration changes is the
whole point of reloading the core, for me at least — and changes in
solrconfig.xml and schema.xml and db-data-config.xml do get applied, so it
seems incongruous for solrcore.properties to be different.
> solrcore.properties is not reloaded when core is reloaded
> ---------------------------------------------------------
>
> Key: SOLR-5931
> URL: https://issues.apache.org/jira/browse/SOLR-5931
> Project: Solr
> Issue Type: Bug
> Components: multicore
> Affects Versions: 4.7
> Reporter: Gunnlaugur Thor Briem
> Assignee: Shalin Shekhar Mangar
> Priority: Minor
>
> When I change solrcore.properties for a core, and then reload the core, the
> previous values of the properties in that file are still in effect. If I
> *unload* the core and then add it back, in the “Core Admin” section of the
> admin UI, then the changes in solrcore.properties do take effect.
> My specific test case is a DataImportHandler where {{db-data-config.xml}}
> uses a property to decide which DB host to talk to:
> {code:xml}
> <dataSource driver="org.postgresql.Driver" name="meta"
> url="jdbc:postgresql://${dbhost}/${solr.core.name}" .../>
> {code}
> When I change that {{dbhost}} property in {{solrcore.properties}} and reload
> the core, the next dataimport operation still connects to the previous DB
> host. Reloading the dataimport config does not help. I have to unload the
> core (or fully restart the whole Solr) for the properties change to take
> effect.
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