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From "Murali Varadarajan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-957) Lucene RAM Directory doesn't work for Index Size > 8 GB
Date Sat, 28 Jul 2007 01:50:53 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12516123
] 

Murali Varadarajan commented on LUCENE-957:
-------------------------------------------

Doron Cohon,

Thanks a tonne. I tried your first patch and it didn't work. Today i saw your message and
checked out the source from head and built it.
It worked !!!

:-)

> Lucene RAM Directory doesn't work for Index Size > 8 GB
> -------------------------------------------------------
>
>                 Key: LUCENE-957
>                 URL: https://issues.apache.org/jira/browse/LUCENE-957
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Store
>            Reporter: Doron Cohen
>            Assignee: Doron Cohen
>         Attachments: lucene-957.patch, lucene-957.patch
>
>
> from user list - http://www.gossamer-threads.com/lists/lucene/java-user/50982
> Problem seems to be casting issues in RAMInputStream.
> Line 90:
>       bufferStart = BUFFER_SIZE * currentBufferIndex;
> both rhs are ints while lhs is long.
> so a very large product would first overflow MAX_INT, become negative, and only then
(auto) casted to long, but this is too late. 
> Line 91: 
>      bufferLength = (int) (length - bufferStart);
> both rhs are longs while lhs is int.
> so the (int) cast result may turn negative and the logic that follows would be wrong.

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