[infinispan-issues] [JBoss JIRA] (ISPN-6042) NPE when using avg on repeated property and one group does not contain any value

[RH Bugzilla Integration (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-6042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144707#comment-13144707 ] 

RH Bugzilla Integration commented on ISPN-6042:
-----------------------------------------------

Adrian Nistor <anistor at redhat.com> changed the Status of [bug 1295516|https://bugzilla.redhat.com/show_bug.cgi?id=1295516] from NEW to POST

> NPE when using avg on repeated property and one group does not contain any value
> --------------------------------------------------------------------------------
>
>                 Key: ISPN-6042
>                 URL: https://issues.jboss.org/browse/ISPN-6042
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Embedded Querying
>    Affects Versions: 8.1.0.Final
>            Reporter: Adrian Nistor
>            Assignee: Adrian Nistor
>             Fix For: 8.2.0.Alpha1, 8.1.1.Final
>
>
> Adding this test to QueryDslConditionsTest results in NPE:
> {code}
>    public void testEmbeddedAvg() {
>       QueryFactory qf = getQueryFactory();
>       Query q = qf.from(getModelFactory().getUserImplClass())
>             .select(Expression.property("surname"), Expression.avg("addresses.number"))
>             .groupBy("surname")
>             .orderBy("surname")
>             .build();
>       List<Object[]> list = q.list();
>       assertEquals(3, list.size());
>       assertEquals(2, list.get(0).length);
>       assertEquals(2, list.get(1).length);
>       assertEquals(2, list.get(2).length);
>       assertEquals(156d, (Double) list.get(0)[1], 0.0001d);
>       assertEquals(150d, (Double) list.get(1)[1], 0.0001d);
>       assertEquals(null, list.get(2)[1]);
>    }
> {code}
> {code}
> java.lang.NullPointerException
> 	at org.infinispan.objectfilter.impl.aggregation.AvgAccumulator.merge(AvgAccumulator.java:39)
> 	at org.infinispan.objectfilter.impl.aggregation.FieldAccumulator.merge(FieldAccumulator.java:42)
> 	at org.infinispan.objectfilter.impl.aggregation.Grouper.addRow(Grouper.java:133)
> 	at org.infinispan.query.dsl.embedded.impl.AggregatingQuery.getBaseIterator(AggregatingQuery.java:52)
> 	at org.infinispan.query.dsl.embedded.impl.HybridQuery$1.<init>(HybridQuery.java:47)
> 	at org.infinispan.query.dsl.embedded.impl.HybridQuery.getIterator(HybridQuery.java:45)
> 	at org.infinispan.query.dsl.embedded.impl.BaseEmbeddedQuery.listInternal(BaseEmbeddedQuery.java:65)
> 	at org.infinispan.query.dsl.embedded.impl.BaseEmbeddedQuery.list(BaseEmbeddedQuery.java:57)
> 	at org.infinispan.query.dsl.embedded.impl.DelegatingQuery.list(DelegatingQuery.java:45)
> 	at org.infinispan.query.dsl.embedded.QueryDslConditionsTest.testEmbeddedAvg(QueryDslConditionsTest.java:2066)
> {code}



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