feed containing dissolved hydrogen into the ebullated bed hydroprocessing reactor whereby the dissolved hydrogen eliminates or minimizes the prior art problems of gas hold up and reduced operational efficiency of the recycle pump due to the presence of excess gas in the recycle stream when hydrogen gas was introduced as a separate phase into the reactor application_number US 201213556343 A description in accordance with the process of the invention a substantial portion of the hydrogen gas required for hydroprocessing hydrocracking reactions is dissolved in the liquid feedstock a hydrogen distributor apparatus is utilized to treat the feedstock upstream of the ebullated bed reactor to dissolve at least a substantial portion of the requisite reaction hydrogen gas into the liquid feedstock to produce a combined feed hydrogen stream as the ebullated bed reactor influent in the practice of the process of the invention the ebullated bed reactor gas hold up is less than 40 v of the total liquid volume passing through the reactor and preferably less than 10 v and most preferably less than 1 v of the liquid volume also in the practice of the process of the invention the ebullated bed recycle stream contains less than 10 v of vapors preferably less than 1 0 v and most preferably less than 0 1 v of vapors fig3 a 3c depict internal recycle type ebullated bed reactor apparatus adapted for receiving.