Session Write Failed

[KnightYoshi]

What steps will reproduce the problem?

Couldn't say this was the first time it happened and it happened only once on page reload - reloading a second time had no issue.

What is the expected result?

Session writes to the DB

What do you get instead?

Session write failed

Additional info

yii\base\ErrorException: session_regenerate_id(): Session write failed. ID: user (path: ) in /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/web/Session.php:295 Stack trace: #0 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/web/DbSession.php(103): yii\web\DbSession->regenerateID() #1 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/web/User.php(618): yii\web\DbSession->regenerateID() #2 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/web/User.php(292): app\components\User->switchIdentity() #3 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/web/User.php(674): app\components\User->loginByCookie() #4 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/web/User.php(188): app\components\User->renewAuthStatus() #5 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/web/User.php(343): app\components\User->getIdentity() #6 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/Component.php(132): app\components\User->getId() #7 /Users/KnightYoshi/workspace/www/site_project/modules/randimg/views/randimg/viewset.php(14): app\components\User->__get() #8 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/View.php(330): app\components\View->unknown() #9 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/View.php(250): app\components\View->renderPhpFile() #10 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/View.php(152): app\components\View->renderFile() #11 /Users/KnightYoshi/workspace/www/site_project/components/View.php(58): app\components\View->render() #12 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/Controller.php(381): app\components\View->render() #13 /Users/KnightYoshi/workspace/www/site_project/modules/randimg/controllers/RandimgController.php(158): app\modules\randimg\controllers\RandimgController->render() #14 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/InlineAction.php(57): app\modules\randimg\controllers\RandimgController->actionDisplay() #15 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/InlineAction.php(57): ::call_user_func_array:{/Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/InlineAction.php:57}() #16 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/Controller.php(156): yii\base\InlineAction->runWithParams() #17 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/Module.php(523): app\modules\randimg\controllers\RandimgController->runAction() #18 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/web/Application.php(102): yii\web\Application->runAction() #19 /Users/KnightYoshi/workspace/www/site_project/vendor/yiisoft/yii2/base/Application.php(380): yii\web\Application->handleRequest() #20 /Users/KnightYoshi/workspace/www/site_project/web/index.php(12): yii\web\Application->run() #21 {main}

Q	A
Yii version	2.0.12
PHP version	7.1.6

[samdark]

Could be #9438 related.

[samdark]

Do you write any additional data into database?

[yii-bot]

Thanks for posting in our issue tracker.
In order to properly assist you, we need additional information:

• When does the issue occur?
• What do you see?
• What was the expected result?
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• Do you have exact code to reproduce it? Maybe a PHPUnit tests that fails? (optional)

Thanks!

This is an automated comment, triggered by adding the label status:need more info.

[KnightYoshi]

It also writes the user ID to the session table on log in to be able to invalidate all of the user's sessions.

[samdark]

Try code from master along with debug mode. It will reveal real reason behind the error.

[KnightYoshi]

Try what from the master branch? I have looked in at the debugger. That's how I got the stack trace, because I had already refreshed. The stack trace says session_regenerate_id() threw an exception. I'm not sure what more I'm suppose to be able to find out, especially since it seems to have been a one-off error.

[samdark]

Well, the reason. In 2.0.12 you'll see this error. In master you may see, for example, an exception that occurred during saving values to DB with your custom handler that resulted in session_regenerate_id() errors. If that's not the case then it's different issue.

[KnightYoshi]

I use this for the the session module config to include the user ID.

'writeCallback' => function ($session) {
	return [
		'user_id' => Yii::$app->user->id
	];
}

[samdark]

I'd check if user isn't guest here first.

[KnightYoshi]

I've gone ahead and added a ternary to set the user ID or explicitly set null, but I'm still not sure if that's what caused the issue; since if the user is not signed in that would be null anyway.

Like I said, though. That's the first time that happened and it only happened once. So it's hard to say, but I added checking it anyway per your recommendation.

[samdark]

I'm closing the issue for now since there's not enough info to fix anything. If it will appear again, please let us know.