Sometimes graph execution fails with error like this:
ERROR caused by: The size of data buffer is only 4096. Set appropriate parameter in defaultProperties file.
In such case you should increase the value of proper property, which is stored in defaultProperties file, which is located in “org/jetel/data/” subdirectory of CloverETL engine. You can create your own properties file with overridden properties you need to change only and run graph with -config switch. Full info can be found in CloverETL framework run time constants