Revert changes in dispatcher 18841 (#18843)

framework/CHANGELOG.md

@@ -8,7 +8,6 @@ Yii Framework 2 Change Log
 - Enh #18826: Add ability to turn the sorting off for a clicked column in GridView with multisort (ditibal)
 - Bug #18646: Remove stale identity data from session if `IdentityInterface::findIdentity()` returns `null` (mikehaertl)
 - Bug #18832: Fix `Inflector::camel2words()` adding extra spaces (brandonkelly)
-- Bug #18840: Fix `yii2/log/Logger` to set logger globally (lexizz)
 
 
 2.0.43 August 09, 2021

framework/log/Dispatcher.php

@@ -10,7 +10,6 @@ namespace yii\log;
 use Yii;
 use yii\base\Component;
 use yii\base\ErrorHandler;
-use yii\base\InvalidConfigException;
 
 /**
  * Dispatcher manages a set of [[Target|log targets]].
@@ -107,8 +106,8 @@ class Dispatcher extends Component
 
     /**
      * Gets the connected logger.
-     * If not set, [[\Yii::getLogger()]] will be used.
-     * @property Logger the logger. If not set, [[\Yii::getLogger()]] will be used.
+     * If not set, [[Yii::getLogger()]] will be used.
+     * @property Logger the logger. If not set, [[Yii::getLogger()]] will be used.
      * @return Logger the logger.
      */
     public function getLogger()
@@ -124,7 +123,8 @@ class Dispatcher extends Component
      * Sets the connected logger.
      * @param Logger|string|array $value the logger to be used. This can either be a logger instance
      * or a configuration that will be used to create one using [[Yii::createObject()]].
-     * @throws InvalidConfigException
+     * If you are providing custom logger configuration and would like it to be used for the whole application 
+     * and not just for the dispatcher you should use [[Yii::setLogger()]] instead.
      */
     public function setLogger($value)
     {
@@ -133,7 +133,6 @@ class Dispatcher extends Component
         }
 
         $this->_logger = $value;
-        Yii::setLogger($value);
         $this->_logger->dispatcher = $this;
     }
 

tests/framework/log/DispatcherTest.php

@@ -18,7 +18,6 @@ namespace yii\log {
 
 namespace yiiunit\framework\log {
 
-    use yii\BaseYii;
     use yiiunit\framework\log\mocks\TargetMock;
     use Yii;
     use yii\base\UserException;
@@ -88,16 +87,6 @@ namespace yiiunit\framework\log {
             ]);
             $this->assertInstanceOf('yii\log\Logger', $dispatcher->getLogger());
             $this->assertEquals(42, $dispatcher->getLogger()->traceLevel);
-
-            $dispatcher = new Dispatcher([
-                'logger' => [
-                    'class' => 'yii\log\Logger',
-                    'profilingAware' => true,
-                ],
-            ]);
-            $this->assertInstanceOf('yii\log\Logger', $dispatcher->getLogger());
-            $this->assertEquals(true, $dispatcher->getLogger()->profilingAware);
-            $this->assertEquals(true, BaseYii::getLogger()->profilingAware);
         }
 
         /**