I have tried to csv import just 40 products.
But there was an error like keep buffering like the image.
Then I have uploaded the same content with 10 products per csv file and it was successfully added.
Anybody knows about this error?
PHP likely ran out of some sort of resource. When importing or exporting out of Magento, I always adjust the values for the following PHP settings:
This can be done using the php.ini file, or can usually be temporarily overridden in your .htaccess file in the root of your server.