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https://issues.apache.org/jira/browse/LUCENE-3627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13164816#comment-13164816
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Ken McCracken commented on LUCENE-3627:
---------------------------------------
I have been reviewing https://issues.apache.org/jira/browse/LUCENE-3255 which
seems related in that the error is encountered on the same section of
SegmentInfos.java.
One way to fix this might be to change SegmentInfos.java as follows where int
format = input.readInt(); to
int format;
try {
format = input.readInt();
} catch (IOException ioe) {
if (input.length() == 0) {
try {
input.close();
} finally {
directory.deleteFile(segmentFileName);
}
return;
}
throw ioe;
}
however, there are unit tests that seem to verify that no file deletions are
happening at this low a level.
> 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
> Affects Versions: 3.5
> Environment: lucene-3.5.0, src download from GA release
> lucene.apache.org.
> 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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