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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (LUCENE-1192) FileNotFound exception on adding a RAMDirectory to an IndexWriter
Date Tue, 26 Feb 2008 14:34:51 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless resolved LUCENE-1192.
----------------------------------------

    Resolution: Invalid

> FileNotFound exception on adding a RAMDirectory to an IndexWriter
> -----------------------------------------------------------------
>
>                 Key: LUCENE-1192
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1192
>             Project: Lucene - Java
>          Issue Type: Bug
>    Affects Versions: 2.3.1
>         Environment: || Description || Value ||
> | java -version | {noformat}java version "1.5.0_14"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_14-b03)
> Java HotSpot(TM) 64-Bit Server VM (build 1.5.0_14-b03, mixed mode)
> {noformat} |
> | JVM settings | {noformat}-server -verbose:gc -Xloggc:gc.log -XX:+PrintGCApplicationStoppedTime

> -XX:NewRatio=2 -XX:ParallelGCThreads=4 -Xms6000m -Xmx6000m{noformat} |
> | uname -a | {noformat}Linux pdbindexer2 2.6.22.14-72.fc6 #1 
> SMP Wed Nov 21 14:10:25 EST 2007 x86_64 x86_64 x86_64 GNU/Linux{noformat} |
> | CPU | Dual Core AMD Opteron(tm) Processor 280 |
> | Total available memory | 8G |
>            Reporter: Alex Falca
>
> Hi,
> I'm getting FileNotFoundException on adding RAMDirectory to an IndexWriter with following
stack trace:
> {noformat}
> java.io.FileNotFoundException: _8.fnm
>         at org.apache.lucene.store.RAMDirectory.openInput(RAMDirectory.java:234)
>         at org.apache.lucene.index.FieldInfos.<init>(FieldInfos.java:57)
>         at org.apache.lucene.index.SegmentReader.initialize(SegmentReader.java:298)
>         at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:262)
>         at org.apache.lucene.index.SegmentReader.get(SegmentReader.java:221)
>         at org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:3099)
>         at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:2834)
>         at org.apache.lucene.index.IndexWriter.copyExternalSegments(IndexWriter.java:2263)
>         at org.apache.lucene.index.IndexWriter.addIndexesNoOptimize(IndexWriter.java:2238)
> {noformat}
> Same code works fine with Lucene 2.2.0. Basically I'm trying to index a huge number of
documents (~21mln) having following workflow:
> 1. First documents are added to and index which use a RAMDirectory as a storage
> 2. Once a given condition occurs RAM based index writer is flushed and his directory
is being added to another index writer, which use a FSDirectory as a storage. 
> Sample code:
> {code}
> IndexWriter mainIndexWriter = new IndexWriter(indexDir, new JapaneseAnalyzer(), true);
> IndexWriter ramIndexWriter = new IndexWriter(new RAMDirectory(), new JapaneseAnalyzer(),
true);
> mainIndexWriter.setMergeFactor(10);
> mainIndexWriter.setUseCompoundFile(false);
> ramIndexWriter.setUseCompoundFile(false);
> // Here some code for adding documents to RAM index writer
> ...................................................................................................................
> // method where I'm flushing from memory to disk and getting exception
> ramIndexWriter.flush();
> mainIndexWriter.addIndexesNoOptimize(new Directory[] {ramIndexWriter.getDirectory()});
> ramIndexWriter.close();
> ramIndexWriter = new IndexWriter(new RAMDirectory(), new JapaneseAnalyzer(), true);
> ramIndexWriter.setUseCompoundFile(false);
> System.gc();
> {code}
> I understand that I should be using new features of IndexWriter like flushing by RAM
Usage, but wanna see if there any bugs in my case. Possible I'm facing issue described in
LUCENE-1175, but need a confirmation on that. 

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