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we are running website Magento 2.2.3 CE version. We are getting an error in cron.log please advise?

  1. cron.log

Warning: require_once(/srv/public_html/update/vendor/autoload.php): failed to open stream: No such file or directory in /srv/public_html/update/app/bootstrap.php on line 15

  1. update.log

    We did some R&D and found that vendor directory was missing in /srv/public_html/update/ then we have moved vendor directory to respected path now the above error gone but getting below error.

Update-cron.ERROR: Cron readiness check failure! Found non-writable paths

  1. exception.log

[2019-01-29 06:40:06] main.CRITICAL: No callbacks found {"exception":"[object] (Exception(code: 0): No callbacks found at /srv/public_html/vendor/magento/module-cron/Observer/ProcessCronQueueObserver.php:278)"} []

How to fix these error? Can any one help? Thanks

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  • make sure you have the right permission for vendor folder or check if autoload.php was in there. – fmsthird Jan 27 '19 at 12:51
  • yes it has correct permissions. but it is saying /srv/public_html/update/vendor/autoload.php) this path.... – Nagaraju K Jan 27 '19 at 12:57
  • do you use ssh ? – fmsthird Jan 27 '19 at 13:00
  • yes @magefms we r using ssh. – Nagaraju K Jan 27 '19 at 13:01
  • @magefms please see the permissions prnt.sc/md2mt3 – Nagaraju K Jan 28 '19 at 4:57
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It seems relate to Magemojo configuration. I got the same issue as your issue and I am contacting to magemojo to support. I have two site one use Stratus and it is getting this issue other site is fine without use Status and same source code.

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  • prnt.sc/md3r9q prnt.sc/md3rf6 prnt.sc/md3rlr could u please advise? how to solve? – Nagaraju K Jan 28 '19 at 7:14
  • let me know when u contacted whether magemojo team provided support to fix this issue? – Nagaraju K Jan 28 '19 at 8:45
  • i found that public_html/update/vendor folder is missed in magento2 can u suggest how to fix? – Nagaraju K Jan 28 '19 at 10:05
  • the issue solved due to missing 'update' folder while deployed code in server. – Nagaraju K Mar 15 '19 at 7:39
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As explained here: https://devdocs.magento.com/guides/v2.3/comp-mgr/prereq/prereq_cron.html

This error you're facing is related to the Magento Update/Upgrade scripts. At the end of that Magento article they explain what to do when you get this error:

In Composer-based installations, Magento creates the update/ directory when you run composer create-project. Running composer install does not create the update/ directory (if it did not exist before). See Recreate the Magento updater.

In any case, if you do not plan to upgrade your magento this way, you should consider removing the cron line automatically added by magento (the line should look like this):

php /var/www/yourwebsite.com/update/cron.php >> /var/www/yourwebsite.com/var/log/update.cron.log

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