Re: [CLucene-dev] Concurrency issues

[Thomas B. <tho...@us...>]

Hi,

you need initialize your store before using it with getDirectory($path,0);

Try the following:

====================

use Lucene;

my $path='/path/to/index/directory';

my $analyzer_tmp = new Lucene::Analysis::Standard::StandardAnalyzer();
my $store_tmp = Lucene::Store::FSDirectory->getDirectory($path, 1);

my $tmp_writer = new Lucene::Index::IndexWriter($store_tmp, $analyzer_tmp, 1);
$tmp_writer->close;
undef $tmp_writer;

for (1..10) {
   if (!fork) {
     my $store=Lucene::Store::FSDirectory->getDirectory($path,0);
     my $searcher=new Lucene::Search::IndexSearcher($store);
     exit 0;
   }
}

while (-1!=wait) {} # wait for all children

====================

This should work.

Thomas.

> I am using clucene via the perl interface and I get some errors when I
> write to an index and search that index at the same time.  In fact, even
> doing multiple concurrent searches fails from time to time. For example,
> when I run the following simple perl code:
>
>    use Lucene;
>    my $path='/path/to/index/directory';
>    for (1..10) {
>      if (!fork) {
>        my $store=Lucene::Store::FSDirectory->getDirectory($path,0);
>        my $searcher=new Lucene::Search::IndexSearcher($store);
>        exit 0;
>      }
>    }
>    while (-1!=wait) {} # wait for all children
>
> some of the child processes created by fork die giving the following
> error: "terminate called after throwing an instance of 'CLuceneError'".
> The number of failed process varies from none to all of them.
>
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