What happens

If the summons were properly served and the witnesses reside in a place well connected to the court, have a material information or documents vital to the case, and witnesses have no lawful reason not to attend the court, the court apart from compelling their attendance may also issue bailable or non bailable warrant, can impose penalty and attach your property. All this depends on the seriousness of the matter. Courts are directed by law to quickly discharge witnesses and may also cause the party to pay for their expenses. With so much leniency courts are bound to be strict.