Hi Mike,
Sorry to make you confused. "lock" means the file handle is held by some
other progress, the program can not delete it. There is no exception, I can
see file.delete() method returns false. If I delete the cfs file in the OS
manually, the warning is "File was using by another person or program"
To simplify my question, I made some more code for testing. you can run it
for reproducing, after two loops, you will see the message e.g. "Can not
delete file: D:\index\index2\_0.cfs"
Thank you very much
public class SearchTest
{
private static final int MAX_RESULT = 10000;
private String indexPath1 = "D:\\index\\index1";
private String indexPath2 = "D:\\index\\index2";
private String backupIndexpath = "D:\\index\\index3";
private String indexPath = indexPath1;
private Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30);
private IndexSearcher searcher;
public void search()
{
while (true)
{
try
{
String keyword = "test";
String fieldName = "searchfield";
Directory dir = FSDirectory.open(new File(indexPath));
searcher = new IndexSearcher(dir);
QueryParser queryParse = new QueryParser(Version.LUCENE_30,
fieldName, analyzer);
Query query = queryParse.parse(keyword);
TopDocs hits = searcher.search(query, MAX_RESULT);
int size = 5;
if (hits.scoreDocs.length < size)
{
size = hits.scoreDocs.length;
}
for (int i = 0; i < size; i++)
{
Document doc = searcher.doc(hits.scoreDocs[i].doc);
String text = doc.get(fieldName);
System.out.println("fieldContent is: " + text);
}
IndexSearcher oldSearcher = searcher;
File newFile = new File(getIndexPath());
for (File file : newFile.listFiles())
{
if (!file.delete())
{
System.out.println("Can not delete file: " +
file.getAbsolutePath());
}
}
// Copy index File from another folder to this folder
copyDir(new File(backupIndexpath), newFile);
Directory newDir = FSDirectory.open(newFile);
IndexSearcher newSearcher = new IndexSearcher(newDir);
searcher = newSearcher;
oldSearcher.close();
System.out.println("Closed Searcher: " +
oldSearcher.getIndexReader().directory().toString());
System.out.println("input 'Q' to quit testing...");
BufferedReader br = new BufferedReader(new
InputStreamReader(System.in));
if (br.readLine().trim().equals("Q"))
{
break;
}
}
catch (CorruptIndexException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
catch (ParseException e)
{
e.printStackTrace();
}
}
}
private String getIndexPath()
{
if (indexPath.equals(indexPath1))
{
indexPath = indexPath2;
}
else
{
indexPath = indexPath1;
}
return indexPath;
}
public static void copyDir(File sourceLocation, File targetLocation)
throws IOException
{
String[] children = sourceLocation.list();
for (int i = 0; i < children.length; i++)
{
InputStream in = null;
OutputStream out = null;
try
{
in = new FileInputStream(new File(sourceLocation,
children[i]));
out = new FileOutputStream(new File(targetLocation,
children[i]));
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0)
{
out.write(buf, 0, len);
}
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException ioe)
{
ioe.printStackTrace();
}
finally
{
try
{
if (in != null)
{
in.close();
}
if (out != null)
{
out.close();
}
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
}
public static void main(String[] args)
{
SearchTest searchTest = new SearchTest();
searchTest.search();
}
}
在 2011年1月12日 下午11:53，Michael McCandless <luc...@mikemccandless.com>写道：
> Hmmm.
>
> When you say "locked" what actually does that mean? Can you post the
> exception?
>
> Also, can you whittle down your example even more? EG if calling
> this method twice causes the problem, make a method that calls it
> twice and hits the exception and then start simplifying from there...
>
> Mike
>
> 2011/1/12 张志田 <zhitian.zh...@dianping.com>:
> > Mike, thanks for your feedback.
> >
> > I verified this in the debug mode, so I just check the folder I closed in
> > the last loop. Actually, both two folders are locked.
> >
> > tried with new FSDirectory every loop, no help.
> >
> > Garry
> >
> > 2011/1/12 Michael McCandless <luc...@mikemccandless.com>
> >
> >> When you break out of the loop (user enters 'Q') you don't close the
> >> current searcher. Could that be it?
> >>
> >> Also you are calling FSDir.open each time but should only do it once
> >> (though this should be "harmless").
> >>
> >> Mike
> >>
> >> On Wed, Jan 12, 2011 at 5:39 AM, 张志田 <zhitian.zh...@dianping.com>
> wrote:
> >> > Dear Luceners,
> >> >
> >> > I'm using lucene-3.0.2 in our app. There is some testing code for
> >> switching
> >> > index, however, when my code run a couple of times, I found the index
> >> file
> >> > was locked, I can not delete the old index files.
> >> >
> >> >
> >> > The code looks like:
> >> >
> >> > public class SearchTest
> >> > {
> >> >
> >> > private static final int MAX_RESULT = 10000;
> >> >
> >> > private String indexPath1 = "D:\\index\\index1";
> >> > private String indexPath2 = "D:\\index\\index2";
> >> >
> >> > private String indexPath = indexPath1;
> >> >
> >> > private Analyzer analyzer = new
> StandardAnalyzer(Version.LUCENE_30);
> >> >
> >> > private Directory dir = null;
> >> >
> >> > private IndexSearcher searcher;
> >> >
> >> > public void search()
> >> > {
> >> > while(true)
> >> > {
> >> > try
> >> > {
> >> > String keyword = "test";
> >> > String fieldName = "searchfield";
> >> >
> >> > if(dir == null)
> >> > {
> >> > dir = FSDirectory.open(new File(indexPath));
> >> > }
> >> > searcher = new IndexSearcher(dir);
> >> >
> >> > QueryParser queryParse = new
> >> QueryParser(Version.LUCENE_30,
> >> > fieldName, analyzer);
> >> > Query query = queryParse.parse(keyword);
> >> >
> >> > TopDocs hits = searcher.search(query, MAX_RESULT);
> >> > int size = 5;
> >> > if(hits.scoreDocs.length < size)
> >> > {
> >> > size = hits.scoreDocs.length;
> >> > }
> >> > for (int i = 0; i < size; i++)
> >> > {
> >> > Document doc = searcher.doc(hits.scoreDocs[i].doc);
> >> > String text = doc.get(fieldName);
> >> > System.out.println("fieldContent is: " + text);
> >> > }
> >> >
> >> > IndexSearcher oldSearcher = searcher;
> >> > dir = FSDirectory.open(new File(getIndexPath()));
> >> > IndexSearcher newSearcher = new IndexSearcher(dir);
> >> > searcher = newSearcher;
> >> >
> >> > oldSearcher.close();
> >> > System.out.println("Closed Searcher: " +
> >> > oldSearcher.getIndexReader().directory().toString());
> >> >
> >> > System.out.println("input 'Q' to quit testing...");
> >> > BufferedReader br = new BufferedReader(new
> >> > InputStreamReader(System.in));
> >> >
> >> > if(br.readLine().trim().equals("Q"))
> >> > {
> >> > break;
> >> > }
> >> > }
> >> > catch (CorruptIndexException e)
> >> > {
> >> > e.printStackTrace();
> >> > }
> >> > catch (IOException e)
> >> > {
> >> > e.printStackTrace();
> >> > }
> >> > catch (ParseException e)
> >> > {
> >> > e.printStackTrace();
> >> > }
> >> > }
> >> > }
> >> >
> >> > private String getIndexPath()
> >> > {
> >> > if(indexPath.equals(indexPath1))
> >> > {
> >> > indexPath = indexPath2;
> >> > }
> >> > else
> >> > {
> >> > indexPath = indexPath1;
> >> > }
> >> >
> >> > return indexPath;
> >> > }
> >> >
> >> > public static void main(String[] args)
> >> > {
> >> > SearchTest searchTest = new SearchTest();
> >> > searchTest.search();
> >> > }
> >> >
> >> > }
> >> >
> >> > Can anybody take a look at the above code snippet?
> >> >
> >> > I want to search on the different index file every time so I created
> two
> >> > different folders and switch them time to time. The index files in the
> >> > index1/index2 maybe replaced before the search request comes.
> >> >
> >> > The problem I found is after I ran the above code 2 or more loops, I
> can
> >> not
> >> > modify/delete the cfs/cfx file in the file system(Windows 2003),
> although
> >> I
> >> > closed the searcher every time in the code. It seems that the index
> file
> >> is
> >> > not released.
> >> >
> >> > Is the problem caused by the shared reference of searcher? or some
> shared
> >> > thread in the lucene?
> >> >
> >> > Thanks in advance!
> >> > Garry
> >> >
> >>
> >
> >
> >
> > --
> > 张志田
> >
> > 大众点评网 - 技术部
> > 电话：52521070 - 1675
> >
>
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>
--
张志田
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电话：52521070 - 1675
