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https://issues.apache.org/jira/browse/SOLR-7798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16373489#comment-16373489
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Michael Gibney commented on SOLR-7798:
--------------------------------------
I was indeed developing on master. Which test case is failing for you? I'm
getting a couple of failed tests on master (364b680afaf9) that seem to be
unrelated to the ExpandComponent changes:
{code}
[junit4] Tests with failures [seed: 2723B1A9FC179033]:
[junit4] -
org.apache.solr.handler.component.DummyCustomParamSpellChecker.initializationError
[junit4] -
org.apache.solr.handler.component.ResourceSharingTestComponent.initializationError
{code}
but when I try to selectively run the ExpandComponent test I'm getting:
{code}
ant -Dtests.class="org.apache.solr.handler.component.TestExpandComponent" test
...
[junit4] Tests summary: 0 suites, 0 tests
{code}
No errors ... but I guess something is still amiss.
> 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.
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