A hydrocracking process providing for a reduction of the buildup of polycyclic aromatic hydrocarbons in a heavy oil recycle stream of said hydrocracking process, wherein the process comprises: (a) hydrocracking in a hydrocracker reactor a heavy feedstock to yield a hydrocracked product that is separated into at least two product streams including said heavy oil recycle stream that comprises a concentration of said polycyclic aromatic hydrocarbons, wherein the heavy oil recycle stream is divided into two portions including a first portion of the heavy oil recycle stream and a second portion of the heavy oil recycle stream; (b) passing the first portion of said heavy oil recycle stream as a recycle feed to said hydrocracker reactor; (c) passing the second portion of said heavy oil recycle stream to a vacuum distillation unit wherein said second portion is separated into at least a light vacuum gas oil stream, a heavier vacuum gas oil stream, a slop oil/wax stream and a vacuum resid stream, wherein said light vacuum gas oil stream contains a concentration of polycyclic aromatic hydrocarbons greater than the concentration of polycyclic aromatic hydrocarbons in said heavier vacuum gas oil stream; (d) passing said heavier vacuum gas oil stream as a feed to said hydrocracker reactor; (e) using said light vacuum gas oil containing said higher concentration of polycyclic aromatic compounds as a bleed stream that is not returned to said hydrocracking process; (f) passing the slop oil/wax stream and the vacuum resid stream to a solvent deasphalting unit wherein asphaltenes and heavy polycyclic aromatic hydrocarbons are separated from said streams to yield a deasphalted paraffinic oil depleted in polycyclic aromatic hydrocarbons; and (g) passing said deasphalted paraffinic oil depleted in polycyclic aromatic hydrocarbons as a feed to said hydrocracker reactor, wherein the weight ratio (B/A) of (A) the first portion of the heavy oil recycle stream passed to the hydrocracker and (B) the second portion of said heavy oil recycle stream passed to the vacuum distillation unit is controlled in the range from greater than 0.05 to less than 0.5. (a) hydrocracking in a hydrocracker reactor a heavy feedstock to yield a hydrocracked product that is separated into at least two product streams including said heavy oil recycle stream that comprises a concentration of said polycyclic aromatic hydrocarbons, wherein the heavy oil recycle stream is divided into two portions including a first portion of the heavy oil recycle stream and a second portion of the heavy oil recycle stream; (b) passing the first portion of said heavy oil recycle stream as a recycle feed to said hydrocracker reactor; (c) passing the second portion of said heavy oil recycle stream to a vacuum distillation unit wherein said second portion is separated into at least a light vacuum gas oil stream, a heavier vacuum gas oil stream, a slop oil/wax stream and a vacuum resid stream, wherein said light vacuum gas oil stream contains a concentration of polycyclic aromatic hydrocarbons greater than the concentration of polycyclic aromatic hydrocarbons in said heavier vacuum gas oil stream; (d) passing said heavier vacuum gas oil stream as a feed to said hydrocracker reactor; (e) using said light vacuum gas oil containing said higher concentration of polycyclic aromatic compounds as a bleed stream that is not returned to said hydrocracking process; (f) passing the slop oil/wax stream and the vacuum resid stream to a solvent deasphalting unit wherein asphaltenes and heavy polycyclic aromatic hydrocarbons are separated from said streams to yield a deasphalted paraffinic oil depleted in polycyclic aromatic hydrocarbons; and (g) passing said deasphalted paraffinic oil depleted in polycyclic aromatic hydrocarbons as a feed to said hydrocracker reactor, <EOS>