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Michael Gibney commented on SOLR-7798: -------------------------------------- It looks like the randomness comes from [Line 58 or TestExpandComponent|https://github.com/apache/lucene-solr/blob/master/solr/core/src/test/org/apache/solr/handler/component/TestExpandComponent.java#L58], when "hint=top_fc" is randomly specified; the problem arises when it's specified for a field with no SortedDocValues (the {{null}} comes from [here|https://github.com/apache/lucene-solr/blob/master/solr/core/src/java/org/apache/solr/uninverting/UninvertingReader.java#L349]). > Improve robustness of ExpandComponent > ------------------------------------- > > Key: SOLR-7798 > URL: https://issues.apache.org/jira/browse/SOLR-7798 > Project: Solr > Issue Type: Improvement > Components: SearchComponents - other > Reporter: Jörg Rathlev > Assignee: Joel Bernstein > Priority: Minor > Attachments: expand-component.patch, expand-npe.patch > > Time Spent: 10m > Remaining Estimate: 0h > > The {{ExpandComponent}} causes a {{NullPointerException}} if accidentally > used without prior collapsing of results. > If there are multiple documents in the result which have the same term value > in the expand field, the size of the {{ordBytes}}/{{groupSet}} differs from > the {{count}} value, and the {{getGroupQuery}} method creates an incompletely > filled {{bytesRef}} array, which later causes a {{NullPointerException}} when > trying to sort the terms. > The attached patch extends the test to demonstrate the error, and modifies > the {{getGroupQuery}} methods to create the array based on the size of the > input maps. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org