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https://issues.apache.org/jira/browse/SOLR-7046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Erick Erickson reassigned SOLR-7046:
------------------------------------
Assignee: Erick Erickson
> NullPointerException when group.function uses query() function
> --------------------------------------------------------------
>
> Key: SOLR-7046
> URL: https://issues.apache.org/jira/browse/SOLR-7046
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 4.10.3
> Reporter: Jim Musil
> Assignee: Erick Erickson
> Attachments: SOLR-7046.patch
>
>
> When you attempt to group by function using the query() function, it results
> in an NullPointerException.
> Using the example webapp loaded with the hd.xml file in exampledocs, you can
> recreate by issuing the following query:
> http://localhost:8983/solr/select/?q=*:*&group=true&group.func=ceil(query({!type=edismax%20v=$q}))
> This appears to be due to a small bug in the following file:
> {code:title=Grouping.java}
> protected void prepare() throws IOException {
> Map context = ValueSource.newContext(searcher);
> groupBy.createWeight(context, searcher);
> actualGroupsToFind = getMax(offset, numGroups, maxDoc);
> }
> {code}
> The variable context is always null because it's scope is local to this
> function, but it gets passed on to another function later.
> The patch is simply removing the Map qualifier from the instantiation.
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