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https://issues.apache.org/jira/browse/SOLR-13877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16961822#comment-16961822
]
ASF subversion and git services commented on SOLR-13877:
--------------------------------------------------------
Commit 2055983d80ce5ac68e6efc221b9692eab10c27a6 in lucene-solr's branch
refs/heads/branch_8x from Munendra S N
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=2055983 ]
SOLR-13877: fix NPE in expand component
* This could happen when expand component is not used with collapse
and matched docs have fewer unique values
> NPE in ExpandComponent
> ----------------------
>
> Key: SOLR-13877
> URL: https://issues.apache.org/jira/browse/SOLR-13877
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Munendra S N
> Assignee: Munendra S N
> Priority: Major
> Labels: collapse, expand
> Attachments: SOLR-13877.patch
>
>
> Truncated Stack trace
> {code:java}
> Caused by: java.lang.NullPointerException
> at org.apache.lucene.util.BytesRef.compareTo(BytesRef.java:162)
> at org.apache.lucene.util.BytesRef.compareTo(BytesRef.java:36)
> at
> java.base/java.util.Comparators$NaturalOrderComparator.compare(Comparators.java:52)
> at
> java.base/java.util.Comparators$NaturalOrderComparator.compare(Comparators.java:47)
> at org.apache.lucene.util.ArrayTimSorter.compare(ArrayTimSorter.java:48)
> at org.apache.lucene.util.TimSorter.nextRun(TimSorter.java:109)
> at org.apache.lucene.util.TimSorter.sort(TimSorter.java:201)
> at org.apache.lucene.util.ArrayUtil.timSort(ArrayUtil.java:452)
> at org.apache.lucene.util.ArrayUtil.timSort(ArrayUtil.java:471)
> at org.apache.lucene.util.ArrayUtil.timSort(ArrayUtil.java:479)
> at
> org.apache.lucene.search.TermInSetQuery.<init>(TermInSetQuery.java:85)
> at
> org.apache.lucene.search.TermInSetQuery.<init>(TermInSetQuery.java:107)
> at
> org.apache.solr.handler.component.ExpandComponent.getGroupQuery(ExpandComponent.java:746)
> at
> org.apache.solr.handler.component.ExpandComponent.process(ExpandComponent.java:330)
> at
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:328)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:198)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:2583)
> at org.apache.solr.util.TestHarness.query(TestHarness.java:339)
> at org.apache.solr.util.TestHarness.query(TestHarness.java:321)
> at org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:972)
> {code}
> This could happen when expand component is used without collapse and docs
> returned have fewer unique values
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