We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message
80,259 News Articles

Twitter explains outage, apologizes for downtime

Twitter is investigating the 'cascading bug' that caused the site to fall offline

Twitter was forced to roll back its software to a previous stable version on Thursday in order to restore service after a two-hour outage, one of its engineers said in a blog post.

Neither hackers nor animated GIFs for user avatars caused the service to crash around 9 a.m. Pacific Time, wrote Mazen Rawashdeh, vice president of engineering.

At least one hacking group claimed responsibility, saying it took Twitter down with a distributed denial-of-service (DDOS) attack, but Twitter says hackers were not the cause. An office move by Twitter and tweets related to the Euro 2012 soccer tournament also were not factors, Rawashdeh wrote.

He reiterated Twitter's message from earlier in the day that blamed a "cascading bug," which Rawashdeh described as a bug that isn't "confined to a particular software element, but rather its effect 'cascades' into other elements as well."

"One of the characteristics of such a bug is that it can have a significant impact on all users, worldwide, which was the case today," Rawashdeh wrote. "As soon as we discovered it, we took corrective actions, which included rolling back to a previous stable version of Twitter."

Twitter came back online briefly around 10:10 a.m. Pacific Time but failed a half-hour later. The site recovered by 11:08 a.m. Pacific Time, Rawashdeh wrote, and a review into the cause is under way.

"It's imperative that we remain available around the world, and today we stumbled," Rawashdeh wrote. "For that we offer our most sincere apologies and hope you'll be able to breathe easier now."

Rawashdeh wrote that Twitter has had some of its highest average marks for reliability and stability over the past six months, experiencing as little as 20 seconds of downtime in a 24-hour period.

"Not today though," Rawashdeh wrote.

Send news tips and comments to [email protected]


IDG UK Sites

Best Black Friday 2014 tech deals: Get bargains on smartphones, tablets, laptops and more

IDG UK Sites

What the Internet of Things will look like in 2015: homes will get smarter, people might get fitter

IDG UK Sites

See how Trunk's animated ad helped Ade Edmondson plug The Car Buying Service

IDG UK Sites

Yosemite tips: Complete Guide to OS X Yosemite