diff --git a/src/Elasticsearch/Namespaces/IndicesNamespace.php b/src/Elasticsearch/Namespaces/IndicesNamespace.php
index d2312d44c..348510295 100644
--- a/src/Elasticsearch/Namespaces/IndicesNamespace.php
+++ b/src/Elasticsearch/Namespaces/IndicesNamespace.php
@@ -416,6 +416,17 @@ public function getAlias(array $params = [])
 
         return $this->performRequest($endpoint);
     }
+
+    /**
+     * Proxy to getAlias()
+     * 
+     * @see https://github.com/elastic/elasticsearch-php/issues/1112
+     */
+    public function getAliases(array $params = [])
+    {
+        return $this->getAlias($params);
+    }
+
     /**
      * $params['index']              = (list) A comma-separated list of index names
      * $params['type']               = (list) A comma-separated list of document types
diff --git a/src/Elasticsearch/Transport.php b/src/Elasticsearch/Transport.php
index f436b0bf3..e27d9fdbd 100644
--- a/src/Elasticsearch/Transport.php
+++ b/src/Elasticsearch/Transport.php
@@ -129,8 +129,9 @@ function ($response) {
             },
             //onFailure
             function ($response) {
+                $code = $response->getCode();
                 // Ignore 400 level errors, as that means the server responded just fine
-                if (!(isset($response['code']) && $response['code'] >=400 && $response['code'] < 500)) {
+                if ($code < 400 || $code >= 500) {
                     // Otherwise schedule a check
                     $this->connectionPool->scheduleCheck();
                 }
diff --git a/src/autoload.php b/src/autoload.php
index 5da69d117..ec80ccc85 100644
--- a/src/autoload.php
+++ b/src/autoload.php
@@ -19,47 +19,50 @@
  * @see https://github.com/elastic/elasticsearch-php/issues/967
  */
 
-$classesToAlias = [
-    '\Elasticsearch\Endpoints\Nodes\HotThreads'           => '\Elasticsearch\Endpoints\Cluster\Nodes\HotThreads',
-    '\Elasticsearch\Endpoints\Nodes\Info'                 => '\Elasticsearch\Endpoints\Cluster\Nodes\Info',
-    '\Elasticsearch\Endpoints\Nodes\ReloadSecureSettings' => '\Elasticsearch\Endpoints\Cluster\Nodes\ReloadSecureSettings',
-    '\Elasticsearch\Endpoints\Nodes\Stats'                => '\Elasticsearch\Endpoints\Cluster\Nodes\Stats',
-    '\Elasticsearch\Endpoints\Cluster\GetSettings'        => '\Elasticsearch\Endpoints\Cluster\Settings\Get',
-    '\Elasticsearch\Endpoints\Cluster\PutSettings'        => '\Elasticsearch\Endpoints\Cluster\Settings\Put',
-    '\Elasticsearch\Endpoints\Indices\DeleteAlias'        => '\Elasticsearch\Endpoints\Indices\Alias\Delete',
-    '\Elasticsearch\Endpoints\Indices\ExistsAlias'        => '\Elasticsearch\Endpoints\Indices\Alias\Exists',
-    '\Elasticsearch\Endpoints\Indices\GetAlias'           => '\Elasticsearch\Endpoints\Indices\Alias\Get',
-    '\Elasticsearch\Endpoints\Indices\PutAlias'           => '\Elasticsearch\Endpoints\Indices\Alias\Put',
-    '\Elasticsearch\Endpoints\Indices\ClearCache'         => '\Elasticsearch\Endpoints\Indices\Cache\Clear',
-    '\Elasticsearch\Endpoints\Indices\GetMapping'         => '\Elasticsearch\Endpoints\Indices\Mapping\Get',
-    '\Elasticsearch\Endpoints\Indices\GetFieldMapping'    => '\Elasticsearch\Endpoints\Indices\Mapping\GetField',
-    '\Elasticsearch\Endpoints\Indices\PutMapping'         => '\Elasticsearch\Endpoints\Indices\Mapping\Put',
-    '\Elasticsearch\Endpoints\Indices\GetSettings'        => '\Elasticsearch\Endpoints\Indices\Settings\Get',
-    '\Elasticsearch\Endpoints\Indices\PutSettings'        => '\Elasticsearch\Endpoints\Indices\Settings\Put',
-    '\Elasticsearch\Endpoints\Indices\GetTemplate'        => '\Elasticsearch\Endpoints\Indices\Template\Get',
-    '\Elasticsearch\Endpoints\Indices\PutTemplate'        => '\Elasticsearch\Endpoints\Indices\Template\Put',
-    '\Elasticsearch\Endpoints\Indices\ExistsTemplate'     => '\Elasticsearch\Endpoints\Indices\Template\Exists',
-    '\Elasticsearch\Endpoints\Indices\DeleteTemplate'     => '\Elasticsearch\Endpoints\Indices\Template\Delete',
-    '\Elasticsearch\Endpoints\Indices\ExistsType'         => '\Elasticsearch\Endpoints\Indices\Type\Exists',
-    '\Elasticsearch\Endpoints\Indices\GetUpgrade'         => '\Elasticsearch\Endpoints\Indices\Upgrade\Get',
-    '\Elasticsearch\Endpoints\Indices\Upgrade'            => '\Elasticsearch\Endpoints\Indices\Upgrade\Post',
-    '\Elasticsearch\Endpoints\Indices\ValidateQuery'      => '\Elasticsearch\Endpoints\Indices\Validate\Query',
-    '\Elasticsearch\Endpoints\Ingest\DeletePipeline'      => '\Elasticsearch\Endpoints\Ingest\Pipeline\Delete',
-    '\Elasticsearch\Endpoints\Ingest\GetPipeline'         => '\Elasticsearch\Endpoints\Ingest\Pipeline\Get',
-    '\Elasticsearch\Endpoints\Ingest\PutPipeline'         => '\Elasticsearch\Endpoints\Ingest\Pipeline\Put',
-    '\Elasticsearch\Endpoints\Ingest\ProcessorGrok'       => '\Elasticsearch\Endpoints\Ingest\Pipeline\ProcessorGrok',
-    '\Elasticsearch\Endpoints\GetScript'                  => '\Elasticsearch\Endpoints\Script\Get',
-    '\Elasticsearch\Endpoints\PutScript'                  => '\Elasticsearch\Endpoints\Script\Put',
-    '\Elasticsearch\Endpoints\DeleteScript'               => '\Elasticsearch\Endpoints\Script\Delete',
-    '\Elasticsearch\Endpoints\Snapshot\CreateRepository'  => '\Elasticsearch\Endpoints\Snapshot\Repository\Create',
-    '\Elasticsearch\Endpoints\Snapshot\DeleteRepository'  => '\Elasticsearch\Endpoints\Snapshot\Repository\Delete',
-    '\Elasticsearch\Endpoints\Snapshot\GetRepository'     => '\Elasticsearch\Endpoints\Snapshot\Repository\Get',
-    '\Elasticsearch\Endpoints\Snapshot\VerifyRepository'  => '\Elasticsearch\Endpoints\Snapshot\Repository\Verify',
-    '\Elasticsearch\Endpoints\GetSource'                  => '\Elasticsearch\Endpoints\Source\Get',  
-    '\Elasticsearch\Endpoints\Tasks\ListTasks'            => '\Elasticsearch\Endpoints\Tasks\TasksList'
+$aliasToClass = [
+    '\Elasticsearch\Endpoints\Cluster\Nodes\HotThreads'           => '\Elasticsearch\Endpoints\Nodes\HotThreads',
+    '\Elasticsearch\Endpoints\Cluster\Nodes\Info'                 => '\Elasticsearch\Endpoints\Nodes\Info' ,
+    '\Elasticsearch\Endpoints\Cluster\Nodes\ReloadSecureSettings' => '\Elasticsearch\Endpoints\Nodes\ReloadSecureSettings',
+    '\Elasticsearch\Endpoints\Cluster\Nodes\Stats'                => '\Elasticsearch\Endpoints\Nodes\Stats',
+    '\Elasticsearch\Endpoints\Cluster\Settings\Get'               => '\Elasticsearch\Endpoints\Cluster\GetSettings',
+    '\Elasticsearch\Endpoints\Cluster\Settings\Put'               => '\Elasticsearch\Endpoints\Cluster\PutSettings',
+    '\Elasticsearch\Endpoints\Indices\Alias\Delete'               => '\Elasticsearch\Endpoints\Indices\DeleteAlias',
+    '\Elasticsearch\Endpoints\Indices\Alias\Exists'               => '\Elasticsearch\Endpoints\Indices\ExistsAlias',
+    '\Elasticsearch\Endpoints\Indices\Alias\Get'                  => '\Elasticsearch\Endpoints\Indices\GetAlias',
+    '\Elasticsearch\Endpoints\Indices\Alias\Put'                  => '\Elasticsearch\Endpoints\Indices\PutAlias',
+    '\Elasticsearch\Endpoints\Indices\Aliases\Update'             => '\Elasticsearch\Endpoints\Indices\UpdateAliases',
+    '\Elasticsearch\Endpoints\Indices\Cache\Clear'                => '\Elasticsearch\Endpoints\Indices\ClearCache',
+    '\Elasticsearch\Endpoints\Indices\Exists\Types'               => '\Elasticsearch\Endpoints\Indices\ExistsType',
+    '\Elasticsearch\Endpoints\Indices\Type\Exists'                => '\Elasticsearch\Endpoints\Indices\ExistsType',
+    '\Elasticsearch\Endpoints\Indices\Field\Get'                  => '\Elasticsearch\Endpoints\Indices\GetFieldMapping',
+    '\Elasticsearch\Endpoints\Indices\Mapping\GetField'           => '\Elasticsearch\Endpoints\Indices\GetFieldMapping',
+    '\Elasticsearch\Endpoints\Indices\Mapping\Get'                => '\Elasticsearch\Endpoints\Indices\GetMapping',
+    '\Elasticsearch\Endpoints\Indices\Mapping\Put'                => '\Elasticsearch\Endpoints\Indices\PutMapping',
+    '\Elasticsearch\Endpoints\Indices\Settings\Get'               => '\Elasticsearch\Endpoints\Indices\GetSettings',
+    '\Elasticsearch\Endpoints\Indices\Settings\Put'               => '\Elasticsearch\Endpoints\Indices\PutSettings',
+    '\Elasticsearch\Endpoints\Indices\Template\Get'               => '\Elasticsearch\Endpoints\Indices\GetTemplate',
+    '\Elasticsearch\Endpoints\Indices\Template\Put'               => '\Elasticsearch\Endpoints\Indices\PutTemplate',
+    '\Elasticsearch\Endpoints\Indices\Template\Exists'            => '\Elasticsearch\Endpoints\Indices\ExistsTemplate',
+    '\Elasticsearch\Endpoints\Indices\Template\Delete'            => '\Elasticsearch\Endpoints\Indices\DeleteTemplate',
+    '\Elasticsearch\Endpoints\Indices\Upgrade\Get'                => '\Elasticsearch\Endpoints\Indices\GetUpgrade',
+    '\Elasticsearch\Endpoints\Indices\Upgrade\Post'               => '\Elasticsearch\Endpoints\Indices\Upgrade',
+    '\Elasticsearch\Endpoints\Indices\Validate\Query'             => '\Elasticsearch\Endpoints\Indices\ValidateQuery',
+    '\Elasticsearch\Endpoints\Ingest\Pipeline\Delete'             => '\Elasticsearch\Endpoints\Ingest\DeletePipeline',
+    '\Elasticsearch\Endpoints\Ingest\Pipeline\Get'                => '\Elasticsearch\Endpoints\Ingest\GetPipeline',
+    '\Elasticsearch\Endpoints\Ingest\Pipeline\Put'                => '\Elasticsearch\Endpoints\Ingest\PutPipeline',
+    '\Elasticsearch\Endpoints\Ingest\Pipeline\ProcessorGrok'      => '\Elasticsearch\Endpoints\Ingest\ProcessorGrok',
+    '\Elasticsearch\Endpoints\Script\Get'                         => '\Elasticsearch\Endpoints\GetScript',
+    '\Elasticsearch\Endpoints\Script\Put'                         => '\Elasticsearch\Endpoints\PutScript',
+    '\Elasticsearch\Endpoints\Script\Delete'                      => '\Elasticsearch\Endpoints\DeleteScript',
+    '\Elasticsearch\Endpoints\Snapshot\Repository\Create'         => '\Elasticsearch\Endpoints\Snapshot\CreateRepository',
+    '\Elasticsearch\Endpoints\Snapshot\Repository\Delete'         => '\Elasticsearch\Endpoints\Snapshot\DeleteRepository',
+    '\Elasticsearch\Endpoints\Snapshot\Repository\Get'            => '\Elasticsearch\Endpoints\Snapshot\GetRepository',
+    '\Elasticsearch\Endpoints\Snapshot\Repository\Verify'         => '\Elasticsearch\Endpoints\Snapshot\VerifyRepository',
+    '\Elasticsearch\Endpoints\Source\Get'                         => '\Elasticsearch\Endpoints\GetSource',
+    '\Elasticsearch\Endpoints\Tasks\TasksList'                    => '\Elasticsearch\Endpoints\Tasks\ListTasks'
 ];
 
-foreach ($classesToAlias as $original => $alias) {
+foreach ($aliasToClass as $alias => $original) {
     if (!class_exists($alias, false)) {
         class_alias($original, $alias);
     }
diff --git a/tests/Elasticsearch/Tests/BackwardCompatibleTest.php b/tests/Elasticsearch/Tests/BackwardCompatibleTest.php
index a247dd257..d1678612e 100644
--- a/tests/Elasticsearch/Tests/BackwardCompatibleTest.php
+++ b/tests/Elasticsearch/Tests/BackwardCompatibleTest.php
@@ -17,6 +17,8 @@
 
 namespace Elasticsearch\Tests;
 
+use Elasticsearch\Namespaces\IndicesNamespace;
+
 /**
  * Class BackwardCompatibleTest
  *
@@ -30,14 +32,12 @@ class BackwardCompatibleTest extends \PHPUnit\Framework\TestCase
     public function getClasses()
     {
         return [
-            //['Elasticsearch\Endpoints\TermVectors'],
             ['Elasticsearch\Endpoints\Delete'],
             ['Elasticsearch\Endpoints\ScriptsPainlessExecute'],
             ['Elasticsearch\Endpoints\Create'],
             ['Elasticsearch\Endpoints\Exists'],
             ['Elasticsearch\Endpoints\Get'],
             ['Elasticsearch\Endpoints\Explain'],
-            //['Elasticsearch\Endpoints\MTermVectors'],
             ['Elasticsearch\Endpoints\Search'],
             ['Elasticsearch\Endpoints\FieldCaps'],
             ['Elasticsearch\Endpoints\Msearch'],
@@ -90,6 +90,9 @@ public function getClasses()
             ['Elasticsearch\Endpoints\Indices\Alias\Exists'],
             ['Elasticsearch\Endpoints\Indices\Alias\Get'],
             ['Elasticsearch\Endpoints\Indices\Alias\Put'],
+            ['Elasticsearch\Endpoints\Indices\Aliases\Update'],
+            ['Elasticsearch\Endpoints\Indices\Exists\Types'],
+            ['Elasticsearch\Endpoints\Indices\Field\Get'],
             ['Elasticsearch\Endpoints\Indices\Settings\Get'],
             ['Elasticsearch\Endpoints\Indices\Settings\Put'],
             ['Elasticsearch\Endpoints\Indices\Upgrade\Get'],
@@ -155,4 +158,12 @@ public function testOldClassNamespacesPreviousTo67($class)
     {
         $this->assertTrue(class_exists($class, true), sprintf("Class %s does not exist", $class));
     }
+
+    /**
+     * @see https://github.com/elastic/elasticsearch-php/issues/1112
+     */
+    public function testGetAliasesExistsInIndicesNamespace()
+    {
+        $this->assertTrue(method_exists(IndicesNamespace::class, 'getAliases'));
+    }
 }
diff --git a/tests/Elasticsearch/Tests/TransportTest.php b/tests/Elasticsearch/Tests/TransportTest.php
new file mode 100644
index 000000000..84923c167
--- /dev/null
+++ b/tests/Elasticsearch/Tests/TransportTest.php
@@ -0,0 +1,84 @@
+<?php
+/**
+ * Elasticsearch PHP client
+ *
+ * @link      https://github.com/elastic/elasticsearch-php/
+ * @copyright Copyright (c) Elasticsearch B.V (https://www.elastic.co)
+ * @license   http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
+ * @license   https://www.gnu.org/licenses/lgpl-2.1.html GNU Lesser General Public License, Version 2.1
+ *
+ * Licensed to Elasticsearch B.V under one or more agreements.
+ * Elasticsearch B.V licenses this file to you under the Apache 2.0 License or
+ * the GNU Lesser General Public License, Version 2.1, at your option.
+ * See the LICENSE file in the project root for more information.
+ */
+
+
+declare(strict_types = 1);
+
+namespace Elasticsearch\Tests;
+
+use Elasticsearch\Common\Exceptions\ServerErrorResponseException;
+use Elasticsearch\ConnectionPool\AbstractConnectionPool;
+use Elasticsearch\Connections\Connection;
+use Elasticsearch\Serializers\SerializerInterface;
+use Elasticsearch\Transport;
+use GuzzleHttp\Ring\Future\FutureArray;
+use GuzzleHttp\Ring\Future\FutureArrayInterface;
+use PHPUnit\Framework\TestCase;
+use Psr\Log\LoggerInterface;
+use React\Promise\Deferred;
+
+class TransportTest extends TestCase
+{
+    public function setUp(): void
+    {
+        $this->logger = $this->createMock(LoggerInterface::class);
+        $this->trace = $this->createMock(LoggerInterface::class);
+        $this->serializer = $this->createMock(SerializerInterface::class);
+        $this->connectionPool = $this->createMock(AbstractConnectionPool::class);
+        $this->connection = $this->createMock(Connection::class);
+    }
+
+    public function testPerformRequestWithServerErrorResponseException404Result()
+    {
+        $deferred = new Deferred();
+        $deferred->reject(new ServerErrorResponseException('foo', 404));
+        $future = new FutureArray($deferred->promise());
+
+        $this->connection->method('performRequest')
+            ->willReturn($future);
+        
+        $this->connectionPool->method('nextConnection')
+            ->willReturn($this->connection);
+
+        $this->connectionPool->expects($this->never())
+            ->method('scheduleCheck');
+
+        $transport = new Transport(1, $this->connectionPool, $this->logger);
+
+        $result = $transport->performRequest('GET', '/');
+        $this->assertInstanceOf(FutureArrayInterface::class, $result);
+    }
+
+    public function testPerformRequestWithServerErrorResponseException500Result()
+    {
+        $deferred = new Deferred();
+        $deferred->reject(new ServerErrorResponseException('foo', 500));
+        $future = new FutureArray($deferred->promise());
+
+        $this->connection->method('performRequest')
+            ->willReturn($future);
+        
+        $this->connectionPool->method('nextConnection')
+            ->willReturn($this->connection);
+
+        $this->connectionPool->expects($this->once())
+            ->method('scheduleCheck');
+
+        $transport = new Transport(1, $this->connectionPool, $this->logger);
+
+        $result = $transport->performRequest('GET', '/');
+        $this->assertInstanceOf(FutureArrayInterface::class, $result);
+    }
+}