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From "venkat rangan (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-1044) Behavior on hard power shutdown
Date Fri, 02 Nov 2007 19:07:50 GMT
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
    Affects Versions: 1.9
         Environment: Windows Server 2003, Standard Edition, Sun Hotspot Java 1.5
            Reporter: venkat rangan
             Fix For: 1.9


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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