Palo Alto, Calif. — Many Google+ users experienced a stream of spam notifications as the result of a technical glitch.

“For about 80 minutes we ran out of disk space on the service that keeps track of notifications,” Google senior vice president of engineering Vic Gundotra wrote on Google+ Saturday. “Hence our system continued to try sending notifications. Over, and over again. Yikes.”

Noting that the company didn’t expect their platform to reach such “high thresholds so quickly,” Gundotra apologized for the spam and thanked those who were patient during their field trial period.

Although the company has experienced set-backs in their beta version, CNET reported that the company may be feeling “more confident about expanding its population” — noting the invite people to Google+” button was visible for more than a day as of Monday.

Even though Google hasn’t revealed the number of users so far on Google+, executive chairman Eric Schmidt claimed last week that there were millions.

Related Links: (CNET) (Google+) (VentureBeat)