It shall be the duty of such judge, commissioner, or justice, and of the persons summoned as jurors, as hereinbefore provided, and of the sheriff or constable summoning them, to attend at the time and place specified in such summons or venire; and the officer who summoned the jury shall return such summons or venire to the officer who issued the same, with the names of the persons summoned by him as jurors, and shall certify the manner of notifying the owner or owners of such real estate, if he was found; and if he could not be found in said county, he shall certify that fact. Either party may challenge any of the said jurors for the same causes as in civil action. If more than 12 of said jurors in attendance shall be found qualified to serve as jurors, the officer in attendance, and who issued the summons or venire for such jury, shall strike from the list of jurors a number sufficient to reduce the number of jurors in attendance to 12; and in case less than 12 of the number so summoned as jurors shall attend, the sheriff or constable shall summon a sufficient number of freeholders to make up the number of 12; and the officer issuing the summons or venire for such jury, may issue an attachment for any person summoned as a juror who shall fail to attend, and may enforce obedience of such summons, venire or attachment, as courts of record, or justices’ courts are authorized to do in civil cases.