An error has happened during application run. See exception log for details.

[jason_long]

Hello.

When I want to browse Magento then it show below error:

An error has happened during application run. See exception log for details.

And "exception.log" tell me:

# cat exception.log 
[2019-05-21 07:36:51] main.CRITICAL: The specified "/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28775" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28775): failed to open stream: Permission denied
Class Magento\Framework\App\Http\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. {"exception":"[object] (RuntimeException(code: 0): The specified \"/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28775\" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28775): failed to open stream: Permission denied
Class Magento\\Framework\\App\\Http\\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. at /var/www/html/vendor/magento/framework/Code/Generator.php:135)"} []
[2019-05-21 07:36:51] main.CRITICAL: The specified "/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28773" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28773): failed to open stream: Permission denied
Class Magento\Framework\App\Http\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. {"exception":"[object] (RuntimeException(code: 0): The specified \"/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28773\" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28773): failed to open stream: Permission denied
Class Magento\\Framework\\App\\Http\\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. at /var/www/html/vendor/magento/framework/Code/Generator.php:135)"} []
[2019-05-21 07:37:16] main.CRITICAL: The specified "/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28772" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28772): failed to open stream: Permission denied
Class Magento\Framework\App\Http\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. {"exception":"[object] (RuntimeException(code: 0): The specified \"/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28772\" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28772): failed to open stream: Permission denied
Class Magento\\Framework\\App\\Http\\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. at /var/www/html/vendor/magento/framework/Code/Generator.php:135)"} []
[2019-05-21 07:38:15] main.CRITICAL: The specified "/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28773" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28773): failed to open stream: Permission denied
Class Magento\Framework\App\Http\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. {"exception":"[object] (RuntimeException(code: 0): The specified \"/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28773\" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28773): failed to open stream: Permission denied
Class Magento\\Framework\\App\\Http\\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. at /var/www/html/vendor/magento/framework/Code/Generator.php:135)"} []
[2019-05-21 07:39:21] main.CRITICAL: The specified "/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28772" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28772): failed to open stream: Permission denied
Class Magento\Framework\App\Http\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. {"exception":"[object] (RuntimeException(code: 0): The specified \"/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28772\" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28772): failed to open stream: Permission denied
Class Magento\\Framework\\App\\Http\\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. at /var/www/html/vendor/magento/framework/Code/Generator.php:135)"} []
[2019-05-21 07:40:20] main.CRITICAL: The specified "/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28771" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28771): failed to open stream: Permission denied
Class Magento\Framework\App\Http\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. {"exception":"[object] (RuntimeException(code: 0): The specified \"/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28771\" file couldn't be written. Warning!file_put_contents(/var/www/html/generated/code/Magento/Framework/App/Http/Interceptor.php.28771): failed to open stream: Permission denied
Class Magento\\Framework\\App\\Http\\Interceptor generation error: The requested class did not generate properly, because the 'generated' directory permission is read-only. If --- after running the 'bin/magento setup:di:compile' CLI command when the 'generated' directory permission is set to write --- the requested class did not generate properly, then you must add the generated class object to the signature of the related construct method, only. at /var/www/html/vendor/magento/framework/Code/Generator.php:135)"} []

I guess it is an error about permission but how can I solve it?

Thank you.

[Vimal Kumar]

Hi @jason_long 

It looks like permission issue of generated directory.

Execute the following command from your root folder:

chmod -R 0777 var/ pub/ generated/

[jason_long]

I did and permissions are:

# ll
total 4
drwxr-xr-x.  2 root    root      6 Apr 24 18:16 cgi-bin
drwxrwxr-x. 14 magento apache 4096 May 20 10:54 html

And:

$ ll
total 1212
drwxr-xr-x.  4 magento apache   4096 May 19 13:47 app
-rw-r--r--.  1 magento apache    234 Mar 15 09:42 auth.json.sample
drwxr-xr-x.  2 magento apache     36 May 21 11:36 bin
-rw-r--r--.  1 magento apache 434981 Mar 15 09:42 CHANGELOG.md
-rw-r--r--.  1 magento apache   2257 Mar 15 09:38 composer.json
-rw-r--r--.  1 magento apache 714229 Mar 15 09:42 composer.lock
-rw-r--r--.  1 magento apache    650 Mar 15 09:42 COPYING.txt
drwxr-xr-x.  5 magento apache     59 May 19 13:47 dev
drwxrwxrwx.  3 magento apache     33 May 19 16:57 generated
-rw-r--r--.  1 magento apache     57 Mar 15 09:42 grunt-config.json.sample
-rw-r--r--.  1 magento apache   2994 Mar 15 09:42 Gruntfile.js.sample
-rw-r--r--.  1 magento apache   1370 Mar 15 09:42 index.php
drwxr-xr-x.  4 magento apache     47 May 19 13:47 lib
-rw-r--r--.  1 magento apache  10376 Mar 15 09:42 LICENSE_AFL.txt
-rw-r--r--.  1 magento apache  10364 Mar 15 09:42 LICENSE.txt
-rw-r--r--.  1 magento apache   5625 Mar 15 09:42 nginx.conf.sample
-rw-r--r--.  1 magento apache   1416 Mar 15 09:42 package.json.sample
-rw-r--r--.  1 root    root       68 May 20 10:55 phpinfo.php
drwxr-xr-x.  2 magento apache     55 May 19 13:47 phpserver
drwxrwxrwx.  6 magento apache   4096 May 19 13:47 pub
drwxr-xr-x.  7 magento apache   4096 May 19 13:47 setup
drwxr-xr-x.  7 magento apache   4096 May 19 13:47 update
drwxrwsrwx.  6 magento apache     81 May 21 11:48 var
drwxrwsr-x. 76 magento apache   4096 May 19 13:47 vendor

But problem exist.

[Vimal Kumar]

@jason_long 
Are you on developer mode?

or try once following commands one by one in sequence:

chmod -R 0777 var/ pub/ generated/
rm -rf var/cache/* pub/static/* generated/*
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy
php bin/magento indexer:reindex
php bin/magento cache:flush
chmod -R 0777 var/ pub/ generated/

I hope it will help you!

[Sunil Patel]

Hello @jason_long 

Can you check permission for generated/var folder?

solution :

chmod 0777 -R generated 

if works then mark as solution.

[jason_long]

The command show me below error:

$ sudo php bin/magento setup:di:compile
Compilation was started.
Repositories code generation... 1/7 [====>-----------------------]  14% < 1 sec 68.5 MiBPHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/vendor/magento/module-newsletter/Controller/Adminhtml/Template/Edit.php on line 1

Check https://getcomposer.org/doc/articles/troubleshooting.md#memory-limit-errors for more info on how to handle out of memory errors.

Any idea?

[Vimal Kumar]

@jason_long 
you need to increase memory limit and max execution time on php.

for now you can add following two lines in indexiphp of root folder.  May be it will work for you.

ini_set('max_execution_time', 0);
ini_set('memory_limit', '-1');

otherwise you need to increase from server end for php.

[Sunil Patel]

Hello @jason_long 

firstly you are using sudo into command that will create permission issue

while run command you need to pass memory limit

php -d memory_limit=4G your command

Hope it will help you.

[jason_long]

I must add two lines in "index.php"? I added but got the same error!!!

[jason_long]

Thanks.

It solve the error but other command show me below error:

$ sudo php bin/magento setup:static-content:deploy

In DeployStaticContentCommand.php line 108:
                                                                                                           
  NOTE: Manual static content deployment is not required in "default" and "developer" modes.               
  In "default" and "developer" modes static contents are being deployed automatically on demand.           
  If you still want to deploy in these modes, use -f option: 'bin/magento setup:static-content:deploy -f'

How can I solve it?