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https://issues.apache.org/jira/browse/SOLR-9917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15795820#comment-15795820
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Yonik Seeley commented on SOLR-9917:
------------------------------------

Thanks for investigating Markus, I'll look into it now...

> NPE in JSON facet merger
> ------------------------
>
>                 Key: SOLR-9917
>                 URL: https://issues.apache.org/jira/browse/SOLR-9917
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 6.3
>            Reporter: Markus Jelsma
>             Fix For: master (7.0), 6.4
>
>
> I've spotted this before, and just now one of my unit tests does it as well. 
> I believe this happens when there is no data for the requested field.
> {code}
> java.lang.NullPointerException
>         at java.nio.ByteBuffer.wrap(ByteBuffer.java:396)
>         at 
> org.apache.solr.search.facet.PercentileAgg$Merger.merge(PercentileAgg.java:195)
>         at 
> org.apache.solr.search.facet.FacetBucket.mergeBucket(FacetBucket.java:90)
>         at 
> org.apache.solr.search.facet.FacetRequestSortedMerger.mergeBucketList(FacetRequestSortedMerger.java:61)
>         at 
> org.apache.solr.search.facet.FacetRangeMerger.mergeBucketList(FacetRangeMerger.java:27)
>         at 
> org.apache.solr.search.facet.FacetRangeMerger.merge(FacetRangeMerger.java:91)
>         at 
> org.apache.solr.search.facet.FacetRangeMerger.merge(FacetRangeMerger.java:43)
>         at 
> org.apache.solr.search.facet.FacetBucket.mergeBucket(FacetBucket.java:90)
>         at 
> org.apache.solr.search.facet.FacetQueryMerger.merge(FacetModule.java:444)
>         at 
> org.apache.solr.search.facet.FacetModule.handleResponses(FacetModule.java:272)
> {code}



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