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Plesk is not accessible: Lock Manager error: 'No locks available'

Updated September 17, 2018 18:42

Applicable to:

Plesk for Linux

Symptoms

Plesk is not accessible with the following message in a browser:

PLESK_INFO: Lock Manager error: 'No locks available'.
Message Lock Manager error: 'No locks available'.
File Hierarchical.php
Line 126
Type Plesk\Lock\Exception

Cause

Unclear.

Resolution

Restart the Plesk service:

Connect to a Plesk server via SSH.
Run the following commands:

# service psa stop
# service psa start

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