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From "Ken McCracken (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-3627) CorruptIndexException on indexing after a failure occurs after segments file creation but before any bytes are written
Date Wed, 07 Dec 2011 20:18:40 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-3627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ken McCracken updated LUCENE-3627:
----------------------------------

    Attachment: TestCrashCausesCorruptIndex.java

Drop this file in src/test/org/apache/lucene/store for the lucene 3.5.0 source release, and
run your unit tests with junit4.
                
> CorruptIndexException on indexing after a failure occurs after segments file creation
but before any bytes are written
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-3627
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3627
>             Project: Lucene - Java
>          Issue Type: Bug
>         Environment: Mac OS X 10.6.5, running tests in Eclipse Build id: 20100218-1602,

> java version "1.6.0_24"
> Java(TM) SE Runtime Environment (build 1.6.0_24-b07-334-10M3326)
> Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02-334, mixed mode)
>            Reporter: Ken McCracken
>            Priority: Critical
>         Attachments: TestCrashCausesCorruptIndex.java
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> FSDirectory.createOutput(..) uses a RandomAccessFile to do its work.  On my system the
default FSDirectory.open(..) creates an NIOFSDirectory.  If createOutput is called on a segments_*
file and a crash occurs between RandomAccessFile creation (file system shows a segments_*
file exists but has zero bytes) but before any bytes are written to the file, subsequent IndexWriters
cannot proceed.  The difficulty is that it does not know how to clear the empty segments_*
file.  None of the file deletions will happen on such a segment file because the opening bytes
cannot not be read to determine format and version.
> I will attempt to attach a Test file demonstrates the issue; place it in your 
> src/test/org/apache/lucene/store/
> directory and run the unit tests with JUnit4.

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