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From "Fernando (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-812) slices: aggregate queries fail if any slice has empty results
Date Thu, 04 Dec 2008 02:27:44 GMT
slices: aggregate queries fail if any slice has empty results
-------------------------------------------------------------

                 Key: OPENJPA-812
                 URL: https://issues.apache.org/jira/browse/OPENJPA-812
             Project: OpenJPA
          Issue Type: Bug
          Components: kernel
    Affects Versions: 2.0.0
            Reporter: Fernando
            Priority: Critical


NPE when doing aggregate queries.  I can only guess that it's because the results from a slice
is null.  Easy fix.  I will attach a very small patch.


2008-12-03 18:14:13,348 [pool-2-thread-2] ERROR com.protrade.fanwars.base.services.FanwarsAppEventHandlerWorker
- doRefreshTeamFanBasePoints: Trouble loading TeamFan: <<TeamFanId:TeamFan:8574250>>
<openjpa-2.0.0-SNAPSHOT-r422266:723088M nonfatal user error> org.apache.openjpa.persistence.ArgumentException:
Failed to execute query "select count( this ), max( this.createTime ) from com.protrade.fandom.data.entities.CheerStatus
this  where this.teamFan = :p0 AND this.createTime > :p1 AND this.createTime <= :p2
AND this.points > 0". Check the query syntax for correctness. See nested exception for
details. 
        at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:857)
        at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:779)
        at org.apache.openjpa.kernel.DelegatingQuery.execute(DelegatingQuery.java:525)
        at org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:257)
        at org.apache.openjpa.persistence.QueryImpl.getSingleResult(QueryImpl.java:452)
        at com.protrade.common.persistence.JPAUtil.execute(JPAUtil.java:181)
        at com.protrade.common.persistence.JPAUtil.executeUnique(JPAUtil.java:162)
        at com.protrade.common.persistence.JPADQuery.uniqueResult(JPADQuery.java:32)
        at com.protrade.common.persistence.BaseRootDAOBase.runUniqueQueryNCS(BaseRootDAOBase.java:290)
        at com.protrade.common.persistence.BaseDAOBase.runUniqueQueryNCS(BaseDAOBase.java:132)
        at com.protrade.fandom.data.FandomCoreDAO.getCheerStatusCountLastDate(FandomCoreDAO.java:582)
        at com.protrade.fandom.data.FandomCoreDAO.getTeamFanBasePointsCount(FandomCoreDAO.java:547)
        at com.protrade.fanwars.base.services.FanwarsAppEventHandlerWorker.doRefreshTeamFanBasePoints(FanwarsAppEventHandlerWorker.java:795)
        at com.protrade.fanwars.base.services.FanwarsAppEventHandler$11.run2(FanwarsAppEventHandler.java:270)
        at com.protrade.fanwars.base.services.FanwarsAppEventHandler$FanwarsWorkerRunnable.run(FanwarsAppEventHandler.java:441)
        at com.protrade.common.spring.OpenEMFilter$BindThreadRunnable.run(OpenEMFilter.java:129)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
        at java.util.concurrent.FutureTask.run(FutureTask.java:123)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:65)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:168)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.NullPointerException
        at org.apache.openjpa.slice.jdbc.UniqueResultObjectProvider.max(UniqueResultObjectProvider.java:126)
        at org.apache.openjpa.slice.jdbc.UniqueResultObjectProvider.next(UniqueResultObjectProvider.java:98)
        at org.apache.openjpa.kernel.QueryImpl.singleResult(QueryImpl.java:1292)
        at org.apache.openjpa.kernel.QueryImpl.toResult(QueryImpl.java:1226)
        at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:995)
        at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:848)
        ... 23 more


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