Glassfish и предупреждение Unable to set request character encoding to UTF-8

Если в логах Glassfish появляются строки вида:

WARNING: PWC4011: Unable to set request character encoding to UTF-8 from context /_приложение_ because request parameters have already been read, or ServletRequest.getReader() has already been called

То нужно явно указать кодировку utf-8 в glassfish-web.xml

<parameter-encoding default-charset="UTF-8">
</parameter-encoding>