The Validation Server log file size grew to <4GB and the application is no longer able to read/write to that file.
Check the validation server log file size. If it is <4gb, stop the validation service from the console and move the log file to another location. Don't leave rename the file and leave it in the same folder - it will not auto-delete during log rotation.
Set the logging level to INFO and save the settings.
Restart the Validation Server from the console.
Imported Document ID: SO20235
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