并行备份，第一个先完成会删除backup-temp\temp\manifest.txt，导致第二个失败

[deeprado]

Parallel backup, the first completion will delete backup-temp\temp\manifest.txt, resulting in the second failure.
Exception information:

Starting backup...
Determining files to backup...
Backup failed because file_put_contents(D:\Projects\phpstorm\blog3\storage\app/backup-temp\temp\manifest.txt): failed to open stream: No such file
or directory.
#0 [internal function]: Illuminate\Foundation\Bootstrap\HandleExceptions->handleError(2, 'file_put_conten...', 'D:\Projects\php...', 43, Array)
#1 D:\Projects\phpstorm\blog3\vendor\spatie\laravel-backup\src\Tasks\Backup\Manifest.php(43): file_put_contents('D:\Projects\php...', 'D:\Proje
cts\php...', 8)
#2 D:\Projects\phpstorm\blog3\vendor\spatie\laravel-backup\src\Tasks\Backup\BackupJob.php(172): Spatie\Backup\Tasks\Backup\Manifest->addFiles(Obje
ct(Generator))
#3 D:\Projects\phpstorm\blog3\vendor\spatie\laravel-backup\src\Tasks\Backup\BackupJob.php(142): Spatie\Backup\Tasks\Backup\BackupJob->createBackup
Manifest()
#4 D:\Projects\phpstorm\blog3\vendor\spatie\laravel-backup\src\Commands\BackupCommand.php(52): Spatie\Backup\Tasks\Backup\BackupJob->run()
#5 [internal function]: Spatie\Backup\Commands\BackupCommand->handle()
#6 D:\Projects\phpstorm\blog3\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(29): call_user_func_array(Array, Array)
#7 D:\Projects\phpstorm\blog3\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(87): Illuminate\Container\BoundMethod::Illuminate
Container{closure}()
#8 D:\Projects\phpstorm\blog3\vendor\laravel\framework\src\Illuminate\Container\BoundMethod.php(31): Illuminate\Container\BoundMethod::callBoundMe
thod(Object(Illuminate\Foundation\Application), Array, Object(Closure))
#9 D:\Projects\phpstorm\blog3\vendor\laravel\framework\src\Illuminate\Container\Container.php(572): Illuminate\Container\BoundMethod::call(Object(
Illuminate\Foundation\Application), Array, Array, NULL)
#10 D:\Projects\phpstorm\blog3\vendor\laravel\framework\src\Illuminate\Console\Command.php(183): Illuminate\Container\Container->call(Array)
#11 D:\Projects\phpstorm\blog3\vendor\symfony\console\Command\Command.php(255): Illuminate\Console\Command->execute(Object(Symfony\Component\Conso
le\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
#12 D:\Projects\phpstorm\blog3\vendor\laravel\framework\src\Illuminate\Console\Command.php(170): Symfony\Component\Console\Command\Command->run(Ob
ject(Symfony\Component\Console\Input\ArgvInput), Object(Illuminate\Console\OutputStyle))
#13 D:\Projects\phpstorm\blog3\vendor\spatie\laravel-backup\src\Commands\BaseCommand.php(16): Illuminate\Console\Command->run(Object(Symfony\Compo
nent\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#14 D:\Projects\phpstorm\blog3\vendor\symfony\console\Application.php(886): Spatie\Backup\Commands\BaseCommand->run(Object(Symfony\Component\Conso
le\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#15 D:\Projects\phpstorm\blog3\vendor\symfony\console\Application.php(262): Symfony\Component\Console\Application->doRunCommand(Object(Spatie\Back
up\Commands\BackupCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#16 D:\Projects\phpstorm\blog3\vendor\symfony\console\Application.php(145): Symfony\Component\Console\Application->doRun(Object(Symfony\Component
Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#17 D:\Projects\phpstorm\blog3\vendor\laravel\framework\src\Illuminate\Console\Application.php(89): Symfony\Component\Console\Application->run(Obj
ect(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#18 D:\Projects\phpstorm\blog3\vendor\laravel\framework\src\Illuminate\Foundation\Console\Kernel.php(122): Illuminate\Console\Application->run(Obj
ect(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#19 D:\Projects\phpstorm\blog3\artisan(37): Illuminate\Foundation\Console\Kernel->handle(Object(Symfony\Component\Console\Input\ArgvInput), Object
(Symfony\Component\Console\Output\ConsoleOutput))
#20 {main}
Backup failed because: file_put_contents(D:\Projects\phpstorm\blog3\storage\app/backup-temp\temp\manifest.txt): failed to open stream: No such fil
e or directory.

suggestion:
Generate a unique temporary file for each operation to distinguish or disable parallel operations (join locks)

[freekmurze]

You can fix this problem in your app
More info: https://laravel.com/docs/master/scheduling#preventing-task-overlaps by using withoutOverlapping() in your scheduler.

I'd accept a PR that makes the backup use unique files.