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https://issues.apache.org/jira/browse/SOLR-12224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16438827#comment-16438827
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Shawn Heisey commented on SOLR-12224:
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If collection properties are part of CLUSTERSTATUS, the response could
potentially be quite large. If there are five hundred collections, each with a
handful of properties, that's a lot of information. Somebody who's after a
quick cluster-wide status response probably isn't interested in all of that.
Gathering it will also increase the response time.
I think it is best to allow the existing COLLECTIONPROP action to return the
properties when the request is missing parameters, or create a new action
specifically for listing them.
> there is no API to read collection properties
> ---------------------------------------------
>
> Key: SOLR-12224
> URL: https://issues.apache.org/jira/browse/SOLR-12224
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Affects Versions: 7.3
> Reporter: Hendrik Haddorp
> Priority: Major
>
> Solr 7.3 added the COLLECTIONPROP API call
> (https://lucene.apache.org/solr/guide/7_3/collections-api.html#collectionprop)
> that allows to set arbitrary properties on a collection. There is however no
> API call that returns the data. The only option is to manually read out the
> collectionprops.json file in ZK below the collection.
> Options could be that the COLLECTIONPROP command has an option to retrieve
> properties, have a special command to list the properties and/or to have the
> properties listed in the clusterstatus output for a collection.
> Would be great if SolrJ would also be supported.
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