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From "Doron Cohen (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-1044) Behavior on hard power shutdown
Date Thu, 22 Nov 2007 14:17:43 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Doron Cohen updated LUCENE-1044:
--------------------------------

    Attachment: FSyncPerfTest.java

The standalone (non Lucene) perf test that I used.

> Behavior on hard power shutdown
> -------------------------------
>
>                 Key: LUCENE-1044
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1044
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Index
>         Environment: Windows Server 2003, Standard Edition, Sun Hotspot Java 1.5
>            Reporter: venkat rangan
>            Assignee: Michael McCandless
>             Fix For: 2.3
>
>         Attachments: FSyncPerfTest.java, LUCENE-1044.patch, LUCENE-1044.take2.patch,
LUCENE-1044.take3.patch
>
>
> When indexing a large number of documents, upon a hard power failure  (e.g. pull the
power cord), the index seems to get corrupted. We start a Java application as an Windows Service,
and feed it documents. In some cases (after an index size of 1.7GB, with 30-40 index segment
.cfs files) , the following is observed.
> The 'segments' file contains only zeros. Its size is 265 bytes - all bytes are zeros.
> The 'deleted' file also contains only zeros. Its size is 85 bytes - all bytes are zeros.
> Before corruption, the segments file and deleted file appear to be correct. After this
corruption, the index is corrupted and lost.
> This is a problem observed in Lucene 1.4.3. We are not able to upgrade our customer deployments
to 1.9 or later version, but would be happy to back-port a patch, if the patch is small enough
and if this problem is already solved.

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