[jira] [Created] (SOLR-12914) Solr crashes in /terms request handler

["Vadim Miller (JIRA)" <ji...@apache.org>]

Vadim Miller created SOLR-12914:
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             Summary: Solr crashes in /terms request handler
                 Key: SOLR-12914
                 URL: https://issues.apache.org/jira/browse/SOLR-12914
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
    Affects Versions: 7.5
            Reporter: Vadim Miller


TermsComponent class always tries to fetch all terms from all shards for a further processing. There is  {{java.lang.OutOfMemoryError}} __ exception if the resulting list is too long.  

There is a very common use case when the full terms list is not required: a client needs to see next N terms in alphabetically sorted list starting with a given value. Usually, this is needed for some autocomplete field on a page.

Example URL: 
{{http://localhost:8983/solr/mycollection/terms?terms.fl=fulltext&terms.sort=index&terms.lower=cat&terms.limit=50}}
 
In this example TermsComponent needs to fetch only 50 terms from each shard starting with a value provided in {{terms.lower}} URL parameter. So, it should not reset TermsParams.TERMS_LIMIT parameter when generates a shard query in createSmartShardQuery() method.

The patch is attached.

 

 

 



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