Warning: is_file() expects parameter 1 to be a valid path

[webmak]

Preconditions

1. Ubuntu 16.04
2. PHP 7.0.22

Steps to reproduce

1. run module:enable or module:disable

Expected result

1. do not expect any warnings

Actual result

1. [Exception]
   Warning: is_file() expects parameter 1 to be a valid path, string given in
   /home/user/web/some_site.com/public_html/vendor/colinmollenhour/cache-backend
   -file/File.php on line 512

Additional

when try to debug found that exception is thought for this path /home/user/web/some_site.com/public_html/var/cache/mage--a/mage---966_CRON_LAST_SCHEDULE_GENERATE_ATDEFAULT

[webmak]

After manual cache clearing bug is go out

[magento-engcom-team]

@webmak , thank you for your report. Please specify the exact version of Magento or the tagged build you installed.

[magento-engcom-team]

@webmak we are closing this issue due to inactivity. If you'd like to update it, please reopen the issue.

[ricoliv]

Same problem here.
"FLUSH MAGENTO CACHE" throws this exception in admin.
Magento just updated yesterday (11 Oct 2017) to latest patched Version 2.1.9 with Setup Wizard/System Upgrade

[versdivers]

The problem is for some reason that the string length is really big but the string itself is not.
If you do a var_dump of the $idFile in File.php of the function _cleanNew you will see that the string length does not match the actual length

string(100) "/data/sites/web/***********/www/var/cache/mage--8/mage---355_SYSTEM_STORESNL"

replaced a the domain with *** for security reasons

switching from PHP 7.0 to 7.1 made my stringlength smaller (used to have strings over 700 length) but still not matching the actual string length. Because the length is not matching the file path length it returns false. Just deleting filles is a temp fix (really temp)

re-open please

[tomnyson]

same issue

[versdivers]

I solved this problem by talking to my hosting company who has resolved this by making changes in the fille permissions. So anyone who has this issue i highly recommend to check fille permissions

[jtlindsey]

@versdivers do you know what they changed the permissions from and to? I have a similar error, same file too. But my permissions were set per the docs and everything else is working. In the stack trace i don't see anything about permissions. I posted another thread here.

[dmitrii-fediuk]

I have solved it by removing the cache:

rm -rf var/cache var/log var/page_cache var/view_preprocessed

[marcin-dykas]

Same issue 2.2.0 after clearing cache it's gone

[versdivers]

@jtlindsey I'm not sure what they changed. I changed host by now so i can' tell anymore i'm sorry

[jtlindsey]

@versdivers No problem. It only happens for me after running bin/magento setup:upgrade or bin/magento setup:di:compile. I run chown -R :www-data var/cache/mage-tags/ to resolve.