TYPO3 Core

Hi,

we got a frontend exception in production mode with following message:
Oops, an error occured. Code: ...

After checking the typo3 log file in /typo3temp/logs/ we got:

PHP Warning: file_get_contents(/typo3temp/Cache/Code/fluid_template/Standalone_layout_HeaderContentFooterLayout_9d8acc40f9e4c34e2f073d5ae5c0e190982cd253.php): failed to open stream: No such file or directory in /vendor/typo3/cms/typo3/sysext/core/Classes/Cache/Backend/FileBackend.php line 332' in /vendor/typo3/cms/typo3/sysext/core/Classes/Error/ErrorHandler.php:111\nStack trace:\n#0 [internal function]: TYPO3\CMS\Core\Error\ErrorHandler->handleError(2, 'file_get_conten...', '/var/www/webs/b...', 332, Array)\n#1 /vendor/typo3/cms/typo3/sysext/core/Classes/Cache/Backend/FileBackend.php(332): file_get_contents('/var/www/webs...', false, NULL, 2149, 14)\n#2 /vendor/typo3/cms/typo3/sysext/core/Classes/Cache/Backend/FileBackend.php(217): TYPO3\CMS\Core\Cache\Backend\FileBackend->isCacheFileExpired('/var/www/webs/b...')\n#3 /vendor/typo3/cms/typo3/sysext/core/Classes/Cache/Frontend/AbstractFrontend.php(94): TYPO3\CMS\Core\Cache\Backend\FileBackend->has('Standalone_layo...')\n#4 /vendor/typo3/cms/typo3/sysext/fluid/Classes/Core/Compiler/TemplateCompiler.php(49): TYPO3\CMS\Core\Cache\Frontend\AbstractFrontend->has('Standalone_layo...')\n#5 /vendor/typo3/cms/typo3/sysext/fluid/Classes/View/AbstractTemplateView.php(180): TYPO3\CMS\Fluid\Core\Compiler\TemplateCompiler->has('Standalone_layo...')\n#6 /vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/FluidTemplateContentObject.php(300): TYPO3\CMS\Fluid\View\AbstractTemplateView->render()\n#7 /vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/FluidTemplateContentObject.php(102): TYPO3\CMS\Frontend\ContentObject\FluidTemplateContentObject->renderFluidView()\n#8 /vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(943): TYPO3\CMS\Frontend\ContentObject\FluidTemplateContentObject->render(Array)\n#9 /vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(859): TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer->render(Object(TYPO3\CMS\Frontend\ContentObject\FluidTemplateContentObject), Array)\n#10 /vendor/typo3/cms/typo3/sysext/frontend/Classes/ContentObject/ContentObjectRenderer.php(805): TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer->cObjGetSingle('FLUIDTEMPLATE', Array, '10')\n#11 /vendor/typo3/cms/typo3/sysext/frontend/Classes/Page/PageGenerator.php(210): TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer->cObjGet(Array)\n#12 /vendor/typo3/cms/typo3/sysext/frontend/Classes/Http/RequestHandler.php(216): TYPO3\CMS\Frontend\Page\PageGenerator::renderContent()\n#13/vendor/typo3/cms/typo3/sysext/core/Classes/Core/Bootstrap.php(302): TYPO3\CMS\Frontend\Http\RequestHandler->handleRequest(Object(TYPO3\CMS\Core\Http\ServerRequest))\n#14 /vendor/typo3/cms/typo3/sysext/frontend/Classes/Http/Application.php(78): TYPO3\CMS\Core\Core\Bootstrap->handleRequest(Object(TYPO3\CMS\Core\Http\ServerRequest))\n#15 /vendor/typo3/cms/index.php(33): TYPO3\CMS\Frontend\Http\Application->run()\n#16 [internal function]: {closure}()\n#17 /vendor/typo3/cms/index.php(34): call_user_func(Object(Closure))\n#18 {main}"}

no backend action (e.g. cache clear) happened at the time of the exception.
a "clear cache" action in backend resolved the issue.

do you have an explanation for this behaviour?