12:30 PM PT -- Columbus was released from jail early Thursday after serving 6 days of his 30 day sentence.
Columbus Short pissed off a judge with a wad of excuses for violating probation, and it got him a month behind bars.
The ex "Scandal" star was in court Wednesday for a progress report where the judge handed down the jail sentence, plus 6 months in a residential drug treatment program.
Prosecutors said Short was violating his probation from a 2014 assault case by continuing to smoke marijuana -- testing showed his THC levels were increasing weekly. They also say he's done ZERO hours of community service.
Short tried playing the sympathy card -- his lawyer informed the judge Short's sister died of heart failure last week. It didn't work and ultimately, Short apologized.
He'd already been in custody for 6 days, and was immediately taken back to jail to do 24 more.