During the tests performed on the alternate Blockchain used by the Ethereum developers to test the next network updates, an attack was recorded due to the large amount of spam circulating through the infrastructure used.
The setbacks recorded on the network occurred as soon as the tests began on the Ropsten network. These drawbacks occur at a time when developers are testing the new Byzantium code, the next important update that is contemplated for the development of the Ethereum network.
Because of these drawbacks, members of the Ethereum community mentioned that the release of the update could eventually be delayed, however, with developers in mind that it is scheduled for October 17, they said that at the moment there is no reason to believe that this inconvenience supposes to postpone the scheduled date, although this does not mean that other complications that merit postponing the stipulated lapses can not occur.