Starbucks computer system crashed on a large scale, and some stores gave away free coffee.

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According to foreign media reports, residents in most parts of the United States and Canada did not drink Starbucks coffee for more than a day because the computer system of the coffee chain crashed.

The coffee crisis, which began at 2:00 eastern time on Tuesday, has not yet been fully resolved. The company acknowledged the problem and claimed it was a failure caused by a technology upgrade, not a hacker attack.

A Starbucks spokesman said the computer system crashed as a result of a "technical upgrade" of the store's cash register. 14000 Starbucks stores in North America were affected.

From Texas to Florida to California, there are reports that local Starbucks coffee shops have been affected. Before 4:00 yesterday afternoon, the company issued a statement saying that the problem had been basically resolved.

"We upgraded the cash registers at Starbucks coffee shops in the United States and Canada at night, resulting in a crash in the computer systems of many coffee shops. We can now confirm that almost all coffee shops have returned to normal, and the few remaining coffee shops will soon return to normal. We are deeply grateful for the patience and support of our customers and employees. "

Meanwhile, consumers affected by the outage have left messages on Weibo site Twitter.

"Starbucks computer crashed. If this is a cyber attack by a hacker, then this is a declaration of war! -- Ryan Stewart Lauchi (Ryan Stubenrauch) May 16, 2017 "

Others posted on Twitter that some Starbucks coffee shops began to offer free coffee after resuming normal business to appease consumers.

Warm reminder: Starbucks' computer system is down. Now the staff in the store tell me that they are going to offer free coffee. I don't know how long this benefit will last. -- Caleb Kyle Jorrey (May 16, 2017)

"Starbucks computers all over the country crashed. They are now recovering and are providing free frozen and hot coffee. -- Mike Mike Parise (May 16, 2017)

A Starbucks spokesman said the company did not officially introduce a free coffee policy, but individual coffee shops were free to decide whether to do so. Starbucks' official Twitter account has not yet released an official statement, but it has responded to many consumer questions.

"We apologize for the inconvenience, but we are glad that we have returned to normal. -- Starbucks Coffee May 16, 2017 "

Although Tuesday's Starbucks computer system crash had nothing to do with hackers, it was reported last week that online swindlers had begun to use new tricks to cheat. They hacked into many consumers' Starbucks accounts and transferred the balance.