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https://issues.apache.org/jira/browse/SOLR-9818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ere Maijala updated SOLR-9818:
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Summary: Solr admin UI rapidly retries any request(s) if it loses
connection with the server (was: Solr admin UI must not retry any request if
it loses connection with the server)
> Solr admin UI rapidly retries any request(s) if it loses connection with the
> server
> -----------------------------------------------------------------------------------
>
> Key: SOLR-9818
> URL: https://issues.apache.org/jira/browse/SOLR-9818
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: web gui
> Affects Versions: 6.3
> Reporter: Ere Maijala
>
> It seems that whenever the Solr admin UI loses connection with the server, be
> the reason that the server is too slow to answer or that it's gone away
> completely, it starts hammering the server with the previous request until it
> gets a success response, it seems. That can be especially bad if the last
> attempted action was something like collection reload with a SolrCloud
> instance. The admin UI will quickly add hundreds of reload commands to
> overseer/collection-queue-work, which may essentially cause the replicas to
> get overloaded when they're trying to handle all the reload commands.
> I believe the UI should never retry the previous command blindly when the
> connection is lost, but instead just ping the server until it responds again.
> Steps to reproduce:
> 1.) Fire up Solr
> 2.) Open the admin UI in browser
> 3.) Open a web console in the browser to see the requests it sends
> 4.) Stop solr
> 5.) Try an action in the admin UI
> 6.) Observe the web console in browser quickly fill up with repeats of the
> originally attempted request
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