N.J. Stat. Ann. § 2A:42-8

A lessee or other person claiming or deriving title under a lease who suffers judgment in said action for possession and execution to be executed thereon, without paying the rent and arrears, together with costs and without filing any complaint for equitable relief within 6 months after the execution is executed, shall be barred and foreclosed from all relief or remedy other than by appeal from the judgment, and the landlord or lessor shall, from thenceforth hold the demised premises discharged from the lease.