[LUCENE-2045] FNFE hit when creating an empty index and infoStream is on

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.9.3, 3.0.2, 3.1, 4.0-ALPHA
• Component/s: core/index
• Lucene Fields: New
• Assignee: Michael McCandless
• Reporter: Michael McCandless
• Created: 08/Nov/09 15:27
• Updated: 28/Aug/22 12:13
• Resolved: 30/May/10 15:49

Description

Shai just reported this on the dev list. Simple test:

Directory dir = new RAMDirectory();
IndexWriter writer = new IndexWriter(dir, new SimpleAnalyzer(), MaxFieldLength.UNLIMITED);
writer.setInfoStream(System.out);
writer.addDocument(new Document());
writer.commit();
writer.close();

hits this:

Exception in thread "main" java.io.FileNotFoundException: _0.prx
    at org.apache.lucene.store.RAMDirectory.fileLength(RAMDirectory.java:149)
    at org.apache.lucene.index.DocumentsWriter.segmentSize(DocumentsWriter.java:1150)
    at org.apache.lucene.index.DocumentsWriter.flush(DocumentsWriter.java:587)
    at org.apache.lucene.index.IndexWriter.doFlushInternal(IndexWriter.java:3572)
    at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3483)
    at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3474)
    at org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:1940)
    at org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:1894)

Turns out it's just silly – this is actually an issue I've already fixed on the flex (LUCENE-1458) branch. DocumentsWriter has its own method to enumerate the flushed files and compute their size, but really it shouldn't do that – it should use SegmentInfo's method, instead.