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Posted to dev@accumulo.apache.org by "Billie Rinaldi (Commented) (JIRA)" <ji...@apache.org> on 2012/01/03 17:42:39 UTC
[jira] [Commented] (ACCUMULO-226) BatchScanner iterator
implementation erroneously returns true for hasNext upon subsequent hasNext
calls
[ https://issues.apache.org/jira/browse/ACCUMULO-226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178807#comment-13178807 ]
Billie Rinaldi commented on ACCUMULO-226:
-----------------------------------------
Please resubmit the patch with the "Grant license to ASF" box checked.
> BatchScanner iterator implementation erroneously returns true for hasNext upon subsequent hasNext calls
> -------------------------------------------------------------------------------------------------------
>
> Key: ACCUMULO-226
> URL: https://issues.apache.org/jira/browse/ACCUMULO-226
> Project: Accumulo
> Issue Type: Bug
> Components: client
> Affects Versions: 1.3.5
> Environment: Platform independent
> Reporter: Matthew Kirkley
> Assignee: Keith Turner
> Labels: accumulo, batchscanner
> Fix For: 1.4.0, 1.5.0
>
> Attachments: accumulo_TabletServerBatchReaderIterator.patch
>
>
> If you open a batch scanner and iterate through its contents, after hasNext has returned false, subsequent calls to hasNext will return true. Below is a testcase which shows the issue.
> Connector conn = new Connector(new ZooKeeperInstance("accumulo","localhost"),"root","password".getBytes());
> BatchScanner scanner = conn.createBatchScanner("test", Constants.NO_AUTHS, 1);
> scanner.setRanges(Collections.singletonList(new Range()));
>
> //exhaust the iterator
> Iterator it = scanner.iterator();
> while (it.hasNext()){
> it.next();
> }
> assertFalse("hasNext should be false", it.hasNext());
> I found this issue when wrapping a BatchScanner in a IteratorChain which subsequently seems to call hasNext twice in it's hasNext method. I will attach a patch which resolves the issue.
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