MongoDB\Driver\Exception\BulkWriteCommandException::getWriteConcernErrors

<?php

$manager = new MongoDB\Driver\Manager;

$bulk = new MongoDB\Driver\BulkWriteCommand;
$bulk->insertOne('db.coll', ['x' => 1]);

$writeConcern = new MongoDB\Driver\WriteConcern(50);

try {
    $result = $manager->executeBulkWriteCommand($bulk, ['writeConcern' => $writeConcern]);
} catch (MongoDB\Driver\Exception\BulkWriteCommandException $e) {
    var_dump($e->getWriteConcernErrors());
}

?>

array(1) {
  [0]=>
  object(MongoDB\Driver\WriteConcernError)#6 (3) {
    ["message"]=>
    string(29) "Not enough data-bearing nodes"
    ["code"]=>
    int(100)
    ["info"]=>
    object(stdClass)#8 (1) {
      ["writeConcern"]=>
      object(stdClass)#7 (3) {
        ["w"]=>
        int(50)
        ["wtimeout"]=>
        int(0)
        ["provenance"]=>
        string(14) "clientSupplied"
      }
    }
  }
}