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https://issues.apache.org/jira/browse/SOLR-16089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris M. Hostetter resolved SOLR-16089.
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Fix Version/s: 9.1
main (10.0)
Resolution: Fixed
Thanks Jan.
It's a pretty low risk change (but also not a high severity bug) so i went
ahead and committed to main & 9x.
> DOWN replica causes missing data on Cloud>Nodes admin ui screen for unrelated
> nodes
> -----------------------------------------------------------------------------------
>
> Key: SOLR-16089
> URL: https://issues.apache.org/jira/browse/SOLR-16089
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Admin UI
> Reporter: Chris M. Hostetter
> Assignee: Chris M. Hostetter
> Priority: Major
> Fix For: 9.1, main (10.0)
>
> Attachments: SOLR-16089.patch, SOLR-16089.screenshot.png
>
>
> If a node is {{{}/live_nodes{}}}, but a replica hosted on that node is
> {{DOWN}} ( or missing from the Metrics API response section for that node for
> any other reason) this breaks a brittle assumption in the {{cloud.js}} logic
> that generates the data structure used to power the
> {{/solr/#/~cloud?view=nodes}}
> The current assumption is that _any_ replica found in the {{CLUSTERSTATUS}}
> response, hosted on a live_node, will be found in the Metrics API response --
> when this is not true, the javascript throws a {{TypeError}} while looping
> over the metrics API response, leaving the datastructure it was building
> incomplete.
> This means that, depending on _where_ in the (effectively) random order that
> the metrics API returns node details, all or some of the nodes visible on the
> resulting admin UI screen will be missing data from the metrics API (most
> notably in the Disk Usage column) depending on whether they came "after" the
> node hosting the problematic replica.
> There is nothing obvious in the UI to indicate that a particular node/replica
> is having a problem -- making it particularly hard to identify why columns
> like Disk Usage are "blank"
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