[jira] [Commented] (SOLR-13292) Provide extended per-segment status of a collection

["David Smiley (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-13292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17097141#comment-17097141 ] 

David Smiley commented on SOLR-13292:
-------------------------------------

This issue creates a new SolrClientCache instance on ColStatus.  SCC is never closed though.  SCC ought to implement Closeable but nevertheless it implement a close().  I think if there was a CoreContainer shared instance instead of creating new SCC's this would be less error-prone situation.

> Provide extended per-segment status of a collection
> ---------------------------------------------------
>
>                 Key: SOLR-13292
>                 URL: https://issues.apache.org/jira/browse/SOLR-13292
>             Project: Solr
>          Issue Type: New Feature
>    Affects Versions: 8.0, master (9.0)
>            Reporter: Andrzej Bialecki
>            Assignee: Andrzej Bialecki
>            Priority: Major
>             Fix For: 8.1, master (9.0)
>
>         Attachments: SOLR-13292.patch, SOLR-13292.patch, adminSegments.json, adminSegments.json, colstatus.json, colstatus.json
>
>
> When changing a collection configuration or schema there may be non-obvious conflicts between existing data and the new configuration or the newly declared schema. A similar situation arises when upgrading Solr to a new version while keeping the existing data.
> Currently the {{SegmentsInfoRequestHandler}} provides insufficient information to detect such conflicts. Also, there's no collection-wide command to gather such status from all shard leaders.
> This issue proposes extending the {{/admin/segments}} handler to provide more low-level Lucene details about the segments, including potential conflicts between existing segments' data and the current declared schema. It also adds a new COLSTATUS collection command to report an aggregated status from all shards, and optionally for all collections.



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