Elasticsearch 2 + PHP scroll flow issue

Question

Hi can somebody tell me please how to execute scroll on Elasticsearch 2 via PHP Ruflin\Elastica library? According documentation for ES2 first scroll request should lead to specific index while next requests are called without index with only scroll_id parameter. So I wrote this code:

/** @var Elastica\Client $elastic */
$elastic = $container->getService( 'elastica' );

// This first call works fine. I get the scroll_id.
$elasticScrollData = $elastic->getIndex( 'event' )->request( '_search?scroll=5m', 'GET', ['size' => 500, 'sort' => ['_doc']] )->getData();

$countAll = $elasticScrollData['hits']['total'];

saveToMongo( $elasticScrollData, $countAll, $elastic );


function saveToMongo( $scrollData, $countAll, \Elastica\Client $elastic )
{
    $documents = [];
    foreach ( $scrollData['hits']['hits'] as $item )
    {
        $doc = [];
        $doc['ico'] = (array)$item['_source']['ico'];
        ...         

        $documents[] = $doc;
    }

    try
    {
        saveDataToDb( $documents );
    }
    catch( \Exception $e )
    {
        echo '+++ insert exception: ' . $e->getMessage() . "\n";
    }

    // Here is the problem. It throws me an exception: No enabled connection
    $scrollData = $elastic->request( '_search/scroll', 'GET', ['scroll' => '5m', 'scroll_id' => $scrollData['_scroll_id']] )->getData();

    saveToMongo( $scrollData, $countAll, $offset, $elastic, $mongoCollection );
}

What is wrong with the second call to Elasticsearch? Why it throws error: No enabled connection? Hope somebody knows cause I really dont.

Gasol · Accepted Answer · 2018-10-22 02:44:42Z

1

The Elastica\Client use a round-robin connection pool by default to resolve connectivity issue, If all connections are gone, It throw ClientException with message No enabled connection1.

Check your network connectivity between PHP script and Elasticsearch and review your configuration for Elasticsearch.

answered Oct 22, 2018 at 2:44

Gasol

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1 Comment

Čamo Over a year ago

Yes thats it. Thanks.

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