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Date: Sun, 8 Nov 2009 17:18:08 +0100
Message-ID: <f18c9dde0911080818s68b4cac9o2b1783c3b39db731@mail.gmail.com>
Subject: Re: A report for "Not so important (but still is a) bug"
From: Simon Willnauer <simon.willnauer@googlemail.com>
To: java-dev@lucene.apache.org
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dude, will we have 2.9.2? :)

simon

On Sun, Nov 8, 2009 at 4:14 PM, Michael McCandless
<lucene@mikemccandless.com> wrote:
> We should fix this; I'll open an issue & dig.
>
> Somehow SegmentInfo.files() is being buggy, claiming _0.prx is a file
> belonging to the segment, when it clearly isn't.
>
> BTW we can't hold 2.9.1, since it's now "out" (as of yesterday) :)
>
> Mike
>
> On Sun, Nov 8, 2009 at 8:58 AM, Shai Erera <serera@gmail.com> wrote:
>> Hi
>>
>> I wanted to check something and wrote this very simple program, which
>> surprisingly failed because of a FileNotFound exception:
>>
>> =C2=A0=C2=A0=C2=A0 =C2=A0 Directory dir =3D new RAMDirectory();
>> =C2=A0=C2=A0=C2=A0 =C2=A0 IndexWriter writer =3D new IndexWriter(dir, ne=
w SimpleAnalyzer(),
>> MaxFieldLength.UNLIMITED);
>> =C2=A0=C2=A0=C2=A0 =C2=A0 writer.setInfoStream(System.out);
>> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 writer.addDocument(new Document());
>> =C2=A0=C2=A0=C2=A0 =C2=A0 writer.commit();
>> =C2=A0=C2=A0=C2=A0 =C2=A0 writer.close();
>>
>> It fails with the exception:
>>
>> Exception in thread "main" java.io.FileNotFoundException: _0.prx
>> =C2=A0=C2=A0=C2=A0 at
>> org.apache.lucene.store.RAMDirectory.fileLength(RAMDirectory.java:149)
>> =C2=A0=C2=A0=C2=A0 at
>> org.apache.lucene.index.DocumentsWriter.segmentSize(DocumentsWriter.java=
:1150)
>> =C2=A0=C2=A0=C2=A0 at
>> org.apache.lucene.index.DocumentsWriter.flush(DocumentsWriter.java:587)
>> =C2=A0=C2=A0=C2=A0 at
>> org.apache.lucene.index.IndexWriter.doFlushInternal(IndexWriter.java:357=
2)
>> =C2=A0=C2=A0=C2=A0 at org.apache.lucene.index.IndexWriter.doFlush(IndexW=
riter.java:3483)
>> =C2=A0=C2=A0=C2=A0 at org.apache.lucene.index.IndexWriter.flush(IndexWri=
ter.java:3474)
>> =C2=A0=C2=A0=C2=A0 at
>> org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:1940)
>> =C2=A0=C2=A0=C2=A0 at
>> org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:1894)
>>
>> This happens on the latest code from trunk (and validated also against 2=
.4).
>> Seems like it's there forever. This only happens when I set infoStream,
>> because as part of the logging we compute the segment size. _0.prx is no=
t
>> found because I didn't add any terms to the index. If I don't set the
>> infoStream, or add terms to the index, this exception is not thrown.
>>
>> Like I wrote in the subject, I don't think it's that important (for exam=
ple
>> to hold off 2.9.1), but still a bug. Not a very important bug even, but =
I
>> can't get it out of my head that it's still a bug :)
>>
>> Can be fixed by making sure segmentSize() does not thrown any FNF except=
ion
>> for missing .prx? Does not sound too safe to me. Maybe we just remember =
this
>> and tell people (like me) "even in silly tests, add a term to the docume=
nt"?
>>
>> Shai.
>>
>
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