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From "Sachin Goyal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-7121) Solr nodes should go down based on configurable thresholds and not rely on resource exhaustion
Date Tue, 03 Mar 2015 00:30:05 GMT

     [ https://issues.apache.org/jira/browse/SOLR-7121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sachin Goyal updated SOLR-7121:
-------------------------------
    Attachment: SOLR-7121.patch

Added tests for long-running queries and 95th/5MinRateRequest statistics as well.
GC-time test will need to run for quite sometime before it can detect the same, hence not
adding test for that.
But the remaining tests should provide a good testing of the patch.

> 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, SOLR-7121.patch, 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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