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Unable to access the Drupal website: Insufficient value for max_allowed_packet option

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Dinara Aspembitova
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Plesk for Linux kb: technical ABT: Group A

Applicable to:

  • Plesk for Linux

Symptoms

  • Unable to access the Drupal website with the error:

    CONFIG_TEXT: 500 error

    CONFIG_TEXT: Additional uncaught exception thrown while handling exception

  • Some database operations via WordPress plugin may fail (for example, backup/restore with plugin WPVIVID)

The following error can be found in website logs:

CONFIG_TEXT: [fcgid:warn] [pid 4997:tid 140222016743168] [client 203.0.113.2:48318] mod_fcgid: stderr: PHP Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 2006 MySQL server has gone away' in /var/www/vhosts/example.com/httpdocs/includes/database/database.inc:2227

Cause

Insufficient value for max_allowed_packet option.

Resolution

Increase  max_allowed_packet option according to the article How to set the value of max_allowed_packet or wait_timeout for MySQL on Plesk server?

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