Symptoms
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Plesk interface is unresponsive, after some time the following error is shown in a web-browser:
HTTP ERROR 500
The site can't be reached
the connection was reset. -
The following error message appears in the Plesk log
%plesk_dir%adminlogsphp_error.log:ERR [panel] Unable to write to stream: fwrite(): send of 4 bytes failed with errno=10054 An existing connection was forcibly closed by the remote host.
Cause
This is a MariaDB Connector bug with ID CONC-518.
Resolution
Until the bug is resolved, apply one of the following temporary workarounds:
Using Plesk Reconfigurator
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Connect to the Plesk server via RDP.
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Start Plesk Reconfigurator at Windows Start Menu > Plesk Reconfigurator.
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Click Repair Plesk Installation > select Plesk services > click Check.
Restart services manually
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Connect to the Plesk server via RDP.
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Open Plesk Services Monitor from Windows Tray.
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Select Plesk Management Service and click Restart.
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Start Internet Information Service Manager (IIS) and navigate to SERVER_NAME > Application Pools.
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Select application pool PleskControlPanel and click Recycle.
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