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From "Timothy Potter (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-11257) Only setting maxThreadCount for ConcurrentMergeScheduler (which is a user error) leads to a confusing validation error msg.
Date Fri, 18 Aug 2017 19:07:01 GMT
Timothy Potter created SOLR-11257:
-------------------------------------

             Summary: 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


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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