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https://issues.apache.org/jira/browse/SOLR-7121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14328499#comment-14328499
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Mark Miller commented on SOLR-7121:
-----------------------------------

Some users will have an aweful lot of cores.

It seems wasteful to have mutliple threads all polling the same information.

bq. The current polling thread is very short lived. Its alive only till the 
core is unhealthy.

Doesn't that mean it's be long lived? Cores should go a long time healthy 
idealy.

> Solr nodes should go down based on configurable thresholds and not rely on 
> resource exhaustion
> ----------------------------------------------------------------------------------------------
>
>                 Key: SOLR-7121
>                 URL: https://issues.apache.org/jira/browse/SOLR-7121
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Sachin Goyal
>         Attachments: SOLR-7121.patch, SOLR-7121.patch
>
>
> Currently, there is no way to control when a Solr node goes down.
> If the server is having high GC pauses or too many threads or is just getting 
> too many queries due to some bad load-balancer, the cores in the machine keep 
> on serving unless they exhaust the machine's resources and everything comes 
> to a stall.
> Such a slow-dying core can affect other cores as well by taking huge time to 
> serve their distributed queries.
> There should be a way to specify some threshold values beyond which the 
> targeted core can its ill-health and proactively go down to recover.
> When the load improves, the core should come up automatically.



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