关于使用solr的php client遇到的问题

我使用的是
http://code.google.com/p/solr-php-client/
这个php client，当我循环添加100次的时候，还可以正常添加，但是如果循环1000次，如下：

PHP code:

for($i=0; $i<1000; $i++){

$part = new Apache_Solr_Document();

$part->setField( 'title', "titleddddd".$i );

$part->setField('url', 'fdasfasfadsf'.$i);

$solr->addDocument( $part );
}
$solr->commit();
$solr->optimize();


就会出现错误
出现错误了exception 'Exception' with message '"0" Status: Communication Error' in D:\xampp\htdocs\bookbiz\library\Apache\Solr\Service.php:389
Stack trace:
#0 D:\xampp\htdocs\bookbiz\library\Apache\Solr\Service.php(656): Apache_Solr_Service->_sendRawPost('http://localhos...', ' #1 D:\xampp\htdocs\bookbiz\library\Apache\Solr\Service.php(682): Apache_Solr_Service->add(' #2 D:\xampp\htdocs\bookbiz\app\modules\default\controllers\TdstestController.php(31): Apache_Solr_Service->addDocument(Object(Apache_Solr_Document))
#3 D:\xampp\htdocs\bookbiz\library\Zend\Controller\Action.php(513): TdstestController->indexAction()
#4 D:\xampp\htdocs\bookbiz\library\Zend\Controller\Dispatcher\Standard.php(289): Zend_Controller_Action->dispat