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https://issues.apache.org/jira/browse/SOLR-16305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17932750#comment-17932750
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David Smiley commented on SOLR-16305:
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I definitely also strongly prefer the 2nd approach, thus don't touch
core.properties. I'm glad you proposed this! To be clear though, I don't
think this involves any new files in ZK. It's some combination of state.json
and collection properties. Perhaps the internal/built-in ones go to state.json
and everything else to collection properties, so it's both. I'd ultimately
like to see core.properties maybe go away in SolrCloud. Just a straw-man bold
proposal; may not be realistic.
> MODIFYCOLLECTION with 'property.*' changes can't change values used in config
> file variables (even though they can be set during collection CREATE)
> ---------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-16305
> URL: https://issues.apache.org/jira/browse/SOLR-16305
> Project: Solr
> Issue Type: Bug
> Reporter: Chris M. Hostetter
> Priority: Major
> Attachments: SOLR-16305_test.patch
>
>
> Consider a configset with a {{solrconfig.xml}} that includes a snippet like
> this...
> {code:java}
> <str name="param.check">${custom.prop:customDefVal}</str>
> {code}
> ...this {{custom.prop}} can be set when doing a {{CREATE}} command for a
> collection that uses this configset, using the {{property.*}} prefix as noted
> in the reg-guide...
> {quote}{{property.{_}name{_}={_}value{_}}}
> |Optional|Default: none|
> Set core property _name_ to {_}value{_}. See the section [Core
> Discovery|https://solr.apache.org/guide/solr/latest/configuration-guide/core-discovery.html]
> for details on supported properties and values.
> {quote}
> ...BUT....
> These values can *not* be changed by using the {{MODIFYCOLLECTION}} command,
> in spite of the ref-guide indicating that it can be used to modify custom
> {{property.*}} attributes...
> {quote}The attributes that can be modified are:
> * {{replicationFactor}}
> * {{collection.configName}}
> * {{readOnly}}
> * other custom properties that use a {{property.}} prefix
> See the [CREATE
> action|https://solr.apache.org/guide/solr/latest/deployment-guide/collection-management.html#create]
> section above for details on these attributes.
> {quote}
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