[jira] [Comment Edited] (SOLR-17334) Minor bugs in Solr dedicated coordinator mode

["ella eln (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-17334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17869683#comment-17869683 ] 

ella eln edited comment on SOLR-17334 at 7/30/24 3:46 PM:
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I think the header is a great Idea. I am developing a fix for costume RH right now and a header in debug would be a great help


was (Author: JIRAUSER306279):
I think the header is a great Idea. I am developing a fix for costume RH right now and a header in debug would be a great help, where can I find it?

> Minor bugs in Solr dedicated coordinator mode
> ---------------------------------------------
>
>                 Key: SOLR-17334
>                 URL: https://issues.apache.org/jira/browse/SOLR-17334
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>    Affects Versions: 9.6
>            Reporter: Torsten Bøgh Köster
>            Assignee: Noble Paul
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> We recently put dedicated Solr coordinator nodes into production and stumbled upon some minor bugs/improvements:
>  - The Solr root resource cannot be requested on a coordinator node
>  - Coordinator requests are enabled for the {{/select}} handler only
>  - From outside proxied and coordinator requests cannot be distinguished
> h3. Solr root resource
> We adopted a general fix from the {{HttpSolrCall}} to check whether the given {{collectionName}} is {{{}null{}}}. This fixes requesting the root resource (and maybe other similar requests)
> h3. {{/select}} handler only
> Coordinator requests are limited to the {{/select}} handler. In our environment we make heavy usage of pre-configured Solr handlers. We could not find any reason to limit coordinator calls to the {{/select}} handler and removed the limitation.
> h3. Coordinator requests cannot be identified by Solr response
> With any Solr response you cannot distinguish coordinator from proxied (or regular) requests. While this is great for consistency it makes testing extra hard. We added an extra Solr header field with the coordinator node name called {{requestCoordinatorNode}} when debug is enabled. This eases testing and debugging a lot.
>  
> A Pull Request is in the making!



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