David Taylor was found guilty of fatal group assault over the death of officer Wayan Sudarsa, whose body was found on a beach in August past year.
They are accused of attacking Wayan Sudarsa on Kuta Beach on the night of August 16, then leaving him to die.
Connor and Taylor had faced three charges each - murder (unpremeditated), carrying a 15-year maximum, group violence causing death carrying 12 years and assault causing death with a seven-year maximum.
The jail term - which will include the seven months Connor has already served - is half of the eight-year sentence that prosecutors had demanded just weeks ago.
After Ms Connor's driver's license and ATM card was discovered next to his body, a hunt for the 46-year-old mother of two from Byron Bay began. Connors said she'd gotten involved to separate the two men from fighting.
Connor had told police that she saw Taylor beating the officer as she searched for her purse.
Taylor, the prosecutor told the court, had shown remorse, regret and had been upfront during the hearings.
Taylor claims he was in "fear of his life" so acted in self-defence when he hit Mr Sudarsa with a mobile phone, the police officer's binoculars and a beer bottle.
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David Taylor, a dreadlocked DJ who adopted a more sober appearance for the trial, said he accepted the judge's decision.
But Arsini said she "can't forgive them" for their roles in her husband's killing.
Taylor, 34, thanked the judges and said he would not appeal.
The pair were not convicted of the more serious charge of murder after prosecutors recognised they had not meant to kill the officer.
After the verdict his father, a vicar, tearfully addressed the media and said: "We are immensely saddened and our hearts go out to to the widow of police officer Wayan Sudarsa and his family to whom we extend our deepest condolences".
When they realised Connor's purse had gone missing, Taylor confronted Sudarsa but did not get the response he was hoping for.
Taylor has said he approached Mr Sudarsa believing the policeman may have stolen the bag, and the encounter escalated into a fight.
By contrast, Connor always denied guilt, saying she had nothing to do with the fight with the officer.