An operation fails in Plesk: upstream timed out (110: Connection timed out) while reading response header from upstream

Symptoms

• The following error message is shown in Plesk when:

  • downloading/uploading/opening a large backup file in Backup Manager

  • importing/exporting a large database dump

    504 Gateway Time-out

• When archiving (zipping) a large amount of data, the operation fails with:

  external error: SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

  ---

  Internal error: SyntaxError: Unexpected token < in JSON at position 0

• The following error message is logged in /var/log/sw-cp-server/error_log:

  [error] 37325#0: *273172 upstream timed out (110: Connection timed out) while reading response header from upstream

Cause

Timeout limit which is set up in Plesk configuration has been exceeded by the operation.

Resolution

1. Connect to the Plesk server via SSH.

2. Modify the file /etc/sw-cp-server/config:

   2.1. Open the file in a text editor. In this example we use the vi editor:

   # vi /etc/sw-cp-server/config

   2.2. Increase the value of:

   fastcgi_read_timeout and fastcgi_send_timeout to 1200:

   fastcgi_read_timeout 1200;
   fastcgi_send_timeout 1200;

   2.3. Save the changes and close the file.

3. Modify the file /usr/local/psa/admin/conf/php.ini:

   3.1. Open the file in a text editor:

   # vi /usr/local/psa/admin/conf/php.ini

   3.2. Increase the max_execution_time value:

   max_execution_time 1200

   3.3. Save the changes and close the file.

4. Restart the Plesk services:

   # service sw-cp-server restart && service sw-engine restart

5. Retry the failed operation.