[jira] [Updated] (SOLR-11257) Only setting maxThreadCount for ConcurrentMergeScheduler (which is a user error) leads to a confusing validation error msg.

["Amrit Sarkar (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-11257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Amrit Sarkar updated SOLR-11257:
--------------------------------
    Attachment: SOLR-11257.patch

Discussion on LUCENE-7980, leads to we should handle this at Solr end. Updated patch: SOLR-11257.patch.

> Only setting maxThreadCount for ConcurrentMergeScheduler (which is a user error) leads to a confusing validation error msg.
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-11257
>                 URL: https://issues.apache.org/jira/browse/SOLR-11257
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Timothy Potter
>            Priority: Minor
>         Attachments: SOLR-11257.patch, SOLR-11257.patch
>
>
> I tried tuning the maxThreadCount for my Concurrent scheduler using:
> {code}
>  <mergeScheduler class="org.apache.lucene.index.ConcurrentMergeScheduler">
>           <int name="maxThreadCount">4</int>
>        </mergeScheduler>
> {code}
> and got:
> {code}
> Validation errors:
> Error: java.lang.IllegalArgumentException:java.lang.IllegalArgumentException: both maxMergeCount and maxThreadCount must be AUTO_DETECT_MERGES_AND_THREADS
> {code}
> Hmmm ... don't know what that means? As I user I need a better error message than that ^ Of course looking at the code, it seems I must also set: {{maxMergeCount}} but that error doesn't tell me that. So this bug is about fixing up the error to be more helpful to the user. Of course this is advanced functionality, so maybe expecting me to read the code to understand, in which case, just close this as invalid.



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