[jira] [Updated] (LUCENE-5066) TestFieldsReader fails in 4.x with OOM

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-5066:
--------------------------------

    Attachment: LUCENE-5066.patch

here's a patch against 4.x
                
> TestFieldsReader fails in 4.x with OOM
> --------------------------------------
>
>                 Key: LUCENE-5066
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5066
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>         Attachments: LUCENE-5066.patch
>
>
> Its FaultyIndexInput is broken (doesn't implement seek/clone correctly).
> This causes it to read bogus data and try to allocate an enormous byte[] for a term.
> The bug was previously hidden:
> FaultyDirectory doesnt override openSlice, so CFS must not be used at flush if you want to trigger the bug.
> FailtyIndexInput's clone is broken, it uses "new" but doesn't seek the clone to the right place. This causes a disaster with BufferedIndexInput (which it extends), because BufferedIndexInput (not just the delegate) must "know" its position since it has seek-within-block etc code...
> It seems with this test (very simple one), that only 3.x codec triggers it because its term dict relies upon clone()'s being seek'd to right place. 
> I'm not sure what other codecs rely upon this, but imo we should also add a low-level test for directories that does something like this to ensure its really tested:
> {code}
> dir.createOutput(x);
> dir.openInput(x);
> input.seek(somewhere);
> clone = input.clone();
> assertEquals(somewhere, clone.getFilePointer());
> {code}

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org