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https://issues.apache.org/jira/browse/SOLR-5930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13950947#comment-13950947
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Shawn Heisey commented on SOLR-5930:
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I filed an issue once upon a time for a distributed PingRequestHandler. I
ended up not needing it, though. Here's what I do right now, which works
really well:
My distributed index uses what I call a broker core. It's a core with the same
schema and mostly the same config as the other cores, but an empty index. All
of the search handler definitions in solrconfig.xml include the shards
parameter. With this, the client doesn't need to know that the index is
distributed -- it just makes a request to what it thinks is a single index.
Because the ping handler just uses one of the local search handlers, it
automatically does the right thing, whether it's a broker core or a core with
an index. The load balancer health check is wired to the broker cores on each
host, so it will only send queries when the entire index is working.
> Add Threshold counts capability to PingRequestHandler
> -----------------------------------------------------
>
> Key: SOLR-5930
> URL: https://issues.apache.org/jira/browse/SOLR-5930
> Project: Solr
> Issue Type: Improvement
> Reporter: Kranti Parisa
> Priority: Minor
> Labels: pingrequest
>
> PingRequestHandler in solrconfig.xml for doing threshold checks say min no of
> documents to be presented in the index. we can specify the *:* in ping query
> but then if that returns 0 documents, we should be able to say it's not
> healthy.
> extension:
> options to configure PingRequestHandler for the entire solr instance (in
> multi-core environment). all the cores should be healthy in order to say the
> instance is healthy.
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