The Plesk node is shown as unavailable and fails to sync with the management node:
PLESK_INFO: The node status is Unavailable
The service node cannot connect to the management node, or an unexpected error occurred.
Start tag expected, '<' not found
During the sync process, the following error message is shown in
/usr/local/psa/admin/logs/panel.logon the management node:
<errtext>DB query failed: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'psa.locales' doesn't exist, query was: DESCRIBE `locales`</errtext>
[2017-10-16 13:40:44] DEBUG [util_exec] [59e4a8ccb9d22] Starting: filwrpr 96, stdin:
[2017-10-16 13:40:44] DEBUG [util_exec] [59e4a8ccb9d22] Finished in 0.01355s, Error code: TRUE, stdout: , stderr:
[2017-10-16 13:40:44] ERR [panel] The node has not passed validation. An error occurred while checking the node: Start tag expected, '<' not found<br />
psa.localesis absent on the service node:
# plesk db "select * from psa.locales"
ERROR 1146 (42S02): Table 'psa.locales' doesn't exist
The Plesk system database is corrupted on the service node.