[jira] [Commented] (DRILL-1932) Query fails if the first record batch does not contain any record

["Aditya Kishore (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-1932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14265339#comment-14265339 ] 

Aditya Kishore commented on DRILL-1932:
---------------------------------------

Here is the exact exception trace:
{noformat}
15:31:53.736 [2b54e118-bd54-972d-cfca-c6df52ff7d30:frag:1:1] ERROR o.a.d.e.w.f.AbstractStatusReporter - Error 1768b82c-992c-4827-9e9e-ffaae6d80c7d: Failure while running fragment.
java.lang.NullPointerException: null
	at org.apache.drill.exec.record.FragmentWritableBatch.getEmptyLastWithSchema(FragmentWritableBatch.java:71) ~[classes/:na]
	at org.apache.drill.exec.physical.impl.SingleSenderCreator$SingleSenderRootExec.innerNext(SingleSenderCreator.java:106) ~[classes/:na]
	at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:57) ~[classes/:na]
	at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:114) ~[classes/:na]
	at org.apache.drill.exec.work.WorkManager$RunnableWrapper.run(WorkManager.java:254) [classes/:na]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_67]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_67]
	at java.lang.Thread.run(Thread.java:745) [na:1.7.0_67]
{noformat}


> Query fails if the first record batch does not contain any record
> -----------------------------------------------------------------
>
>                 Key: DRILL-1932
>                 URL: https://issues.apache.org/jira/browse/DRILL-1932
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Aditya Kishore
>            Assignee: Aditya Kishore
>
> If the a subscan on the first partition does not return any row, for example if the first region in an HBase table is empty, the query fails with {{NullPointerException}} at {{[FragmentWritableBatch.getEmptyBatchWithSchema()|https://github.com/apache/drill/blob/8afe10f2037612c2fd9cf46fc20e81dd73ad6d24/exec/java-exec/src/main/java/org/apache/drill/exec/record/FragmentWritableBatch.java#L82]}}



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