code cleanup per rxin comments
code cleanup per rxin comments

setjet/spark,dhruve/spark,actuaryzhang/spark,byakuinss/spark,ahnqirage/spark,highfei2011/spark,adrian-ionescu/apache-spark,ibm-research-ireland/sparkoscope,JerryLead/spark,mahak/spark,bdrillard/spark,andrewor14/iolap,brad-kaiser/spark,JoshRosen/spark,cin/spark,taroplus/spark,maropu/spark,kiszk/spark,rezasafi/spark,milliman/spark,dongjoon-hyun/spark,wzhfy/spark,dbtsai/spark,ddna1021/spark,HyukjinKwon/spark,ron8hu/spark,bdrillard/spark,liutang123/spark,pronix/spark,holdenk/spark,jrshust/spark,andrewor14/iolap,SHASHANKB/spark,taroplus/spark,rezasafi/spark,darionyaphet/spark,WindCanDie/spark,haowu80s/spark,ibm-research-ireland/sparkoscope,big-pegasus/spark,nilsgrabbert/spark,patrick-nicholson/spark,mdespriee/spark,ahnqirage/spark,chuckchen/spark,rednaxelafx/apache-spark,akopich/spark,hvanhovell/spark,byakuinss/spark,holdenk/spark,jrshust/spark,zzcclp/spark,rekhajoshm/spark,apache/spark,tengpeng/spark,ueshin/apache-spark,publicRoman/spark,saltstar/spark,alunarbeach/spark,ddna1021/spark,Aegeaner/spark,shuangshuangwang/spark,jianran/spark,sachintyagi22/spark,highfei2011/spark,HyukjinKwon/spark,aokolnychyi/spark,cin/spark,loneknightpy/spark,jianran/spark,poffuomo/spark,mdespriee/spark,sachintyagi22/spark,rekhajoshm/spark,kevinyu98/spark,ron8hu/spark,ptkool/spark,loneknightpy/spark,apache-spark-on-k8s/spark,kimoonkim/spark,BryanCutler/spark,ptkool/spark,1haodian/spark,guoxiaolongzte/spark,patrick-nicholson/spark,yanboliang/spark,xflin/spark,janewangfb/spark,highfei2011/spark,maropu/spark,taroplus/spark,gengliangwang/spark,apache/spark,liyichao/spark,aokolnychyi/spark,wangyum/spark,lxsmnv/spark,bdrillard/spark,lyogavin/spark,techaddict/spark,saturday-shi/spark,akopich/spark,cin/spark,byakuinss/spark,map222/spark,sureshthalamati/spark,ibm-research-ireland/sparkoscope,SHASHANKB/spark,stanzhai/spark,cin/spark,kimoonkim/spark,sureshthalamati/spark,shaneknapp/spark,UndeadBaneGitHub/spark,nchammas/spark,sahilTakiar/spark,WeichenXu123/spark,witgo/spark,zuotingbing/spark,nilsgrabbert/spark,ueshin/apache-spark,huang1900/spark,jkbradley/spark,byakuinss/spark,apache/spark,hhbyyh/spark,kimoonkim/spark,rednaxelafx/apache-spark,kimoonkim/spark,zzcclp/spark,someorz/spark,ptkool/spark,maropu/spark,witgo/spark,caneGuy/spark,chuckchen/spark,mike0sv/spark,LantaoJin/spark,lvdongr/spark,esi-mineset/spark,esi-mineset/spark,wangmiao1981/spark,bravo-zhang/spark,wangmiao1981/spark,aosagie/spark,Panos-Bletsos/spark-cost-model-optimizer,xflin/spark,narahari92/spark,someorz/spark,ron8hu/spark,rjpower/spark,ahnqirage/spark,milliman/spark,saltstar/spark,map222/spark,rjpower/spark,apache-spark-on-k8s/spark,saturday-shi/spark,jkbradley/spark,janewangfb/spark,big-pegasus/spark,markhamstra/spark,facaiy/spark,dongjoon-hyun/spark,spark-test/spark,shuangshuangwang/spark,icexelloss/spark,WindCanDie/spark,mkolod/incubator-spark,setjet/spark,metamx/spark,ibm-research-ireland/sparkoscope,dotunolafunmiloye/spark,darionyaphet/spark,WeichenXu123/spark,lvdongr/spark,nchammas/spark,joseph-torres/spark,ConeyLiu/spark,jkbradley/spark,aray/spark,cloudera/spark,lxsmnv/spark,metamx/spark,szhem/spark,ConeyLiu/spark,dongjoon-hyun/spark,SnappyDataInc/spark,srowen/spark,debugger87/spark,ConeyLiu/spark,saltstar/spark,shaneknapp/spark,michalsenkyr/spark,caneGuy/spark,ericvandenbergfb/spark,milliman/spark,JerryLead/spark,alunarbeach/spark,saltstar/spark,1haodian/spark,loneknightpy/spark,ron8hu/spark,cloud-fan/spark,sahilTakiar/spark,andrewor14/spark,pgandhi999/spark,SHASHANKB/spark,WindCanDie/spark,setjet/spark,HyukjinKwon/spark,zzcclp/spark,wgpshashank/spark,vinodkc/spark,kevinyu98/spark,ron8hu/spark,aray/spark,cin/spark,joseph-torres/spark,stanzhai/spark,dhruve/spark,aosagie/spark,icexelloss/spark,shuangshuangwang/spark,dbtsai/spark,janewangfb/spark,srowen/spark,brad-kaiser/spark,adrian-ionescu/apache-spark,xuanyuanking/spark,ajaysaini725/spark,ptkool/spark,icexelloss/spark,actuaryzhang/spark,saltstar/spark,cin/spark,milliman/spark,apache-spark-on-k8s/spark,yanboliang/spark,JerryLead/spark,alunarbeach/spark,Panos-Bletsos/spark-cost-model-optimizer,pgandhi999/spark,debugger87/spark,guoxiaolongzte/spark,bravo-zhang/spark,pronix/spark,sachintyagi22/spark,dongjoon-hyun/spark,eyalfa/spark,bOOm-X/spark,apache/spark,wgpshashank/spark,xflin/spark,narahari92/spark,skonto/spark,andrewor14/spark,someorz/spark,loneknightpy/spark,1haodian/spark,zzcclp/spark,michalsenkyr/spark,sahilTakiar/spark,xflin/spark,lvdongr/spark,someorz/spark,joseph-torres/spark,adrian-ionescu/apache-spark,huang1900/spark,rednaxelafx/apache-spark,jianran/spark,poffuomo/spark,mike0sv/spark,yanboliang/spark,mahak/spark,narahari92/spark,wangmiao1981/spark,publicRoman/spark,kissmetrics/spark,zhouyejoe/spark,aokolnychyi/spark,holdenk/spark,techaddict/spark,rednaxelafx/apache-spark,xuanyuanking/spark,ddna1021/spark,gioenn/xSpark,panfengfeng/spark,haowu80s/spark,holdenk/spark,panfengfeng/spark,mahak/spark,janewangfb/spark,tengpeng/spark,icexelloss/spark,dbtsai/spark,poffuomo/spark,darionyaphet/spark,patrick-nicholson/spark,hvanhovell/spark,loneknightpy/spark,darionyaphet/spark,gengliangwang/spark,michalsenkyr/spark,WeichenXu123/spark,caneGuy/spark,huang1900/spark,jrshust/spark,hvanhovell/spark,mdespriee/spark,tengpeng/spark,chuckchen/spark,markhamstra/spark,xuanyuanking/spark,esi-mineset/spark,rekhajoshm/spark,BryanCutler/spark,zuotingbing/spark,map222/spark,pgandhi999/spark,BryanCutler/spark,markhamstra/spark,bdrillard/spark,ConeyLiu/spark,stanzhai/spark,saturday-shi/spark,aray/spark,zuotingbing/spark,liyichao/spark,nilsgrabbert/spark,huang1900/spark,ibm-research-ireland/sparkoscope,joseph-torres/spark,kiszk/spark,hhbyyh/spark,narahari92/spark,aosagie/spark,chuckchen/spark,guoxiaolongzte/spark,SHASHANKB/spark,icexelloss/spark,byakuinss/spark,kiszk/spark,zzcclp/spark,minixalpha/spark,ptkool/spark,SnappyDataInc/spark,saturday-shi/spark,JoshRosen/spark,maropu/spark,eyalfa/spark,markhamstra/spark,1haodian/spark,dongjoon-hyun/spark,setjet/spark,taroplus/spark,nlalevee/spark,caneGuy/spark,goldmedal/spark,stanzhai/spark,ron8hu/spark,LantaoJin/spark,mkolod/incubator-spark,Aegeaner/spark,cloudera/spark,dbtsai/spark,BryanCutler/spark,dhruve/spark,HyukjinKwon/spark,debugger87/spark,ueshin/apache-spark,nlalevee/spark,metamx/spark,dbtsai/spark,zzcclp/spark,ericvandenbergfb/spark,wangmiao1981/spark,gengliangwang/spark,vinodkc/spark,aray/spark,SHASHANKB/spark,dbtsai/spark,publicRoman/spark,ron8hu/spark,loneknightpy/spark,wangyum/spark,aray/spark,tejasapatil/spark,dotunolafunmiloye/spark,aokolnychyi/spark,minixalpha/spark,minixalpha/spark,zero323/spark,lvdongr/spark,holdenk/spark,vax11780/spark,hhbyyh/spark,facaiy/spark,jkbradley/spark,wzhfy/spark,shuangshuangwang/spark,hhbyyh/spark,ahnqirage/spark,witgo/spark,facaiy/spark,mzl9039/spark,eyalfa/spark,jkbradley/spark,chuckchen/spark,mzl9039/spark,JoshRosen/spark,andrewor14/spark,zhouyejoe/spark,liutang123/spark,sryza/spark,hhbyyh/spark,bdrillard/spark,mdespriee/spark,mahak/spark,shaneknapp/spark,ioana-delaney/spark,andrewor14/iolap,wangmiao1981/spark,wgpshashank/spark,LantaoJin/spark,kevinyu98/spark,Panos-Bletsos/spark-cost-model-optimizer,tengpeng/spark,stanzhai/spark,skonto/spark,rekhajoshm/spark,cloud-fan/spark,MLnick/spark,dhruve/spark,jianran/spark,bdrillard/spark,szhem/spark,esi-mineset/spark,loneknightpy/spark,JoshRosen/spark,nilsgrabbert/spark,lyogavin/spark,HyukjinKwon/spark,sureshthalamati/spark,zhouyejoe/spark,sahilTakiar/spark,cloud-fan/spark,srowen/spark,JerryLead/spark,joseph-torres/spark,kissmetrics/spark,vinodkc/spark,ioana-delaney/spark,andrewor14/spark,kiszk/spark,vinodkc/spark,xuanyuanking/spark,minixalpha/spark,JerryLead/spark,aosagie/spark,sryza/spark,rednaxelafx/apache-spark,techaddict/spark,maropu/spark,mzl9039/spark,spark-test/spark,xflin/spark,haowu80s/spark,lxsmnv/spark,liutang123/spark,publicRoman/spark,nchammas/spark,lxsmnv/spark,yanboliang/spark,shaneknapp/spark,metamx/spark,tejasapatil/spark,jiangxb1987/spark,zero323/spark,milliman/spark,sureshthalamati/spark,nlalevee/spark,taroplus/spark,andrewor14/iolap,MLnick/spark,UndeadBaneGitHub/spark,wzhfy/spark,andrewor14/spark,skonto/spark,shaneknapp/spark,kimoonkim/spark,chuckchen/spark,jrshust/spark,wangmiao1981/spark,ericvandenbergfb/spark,JoshRosen/spark,patrick-nicholson/spark,darionyaphet/spark,sureshthalamati/spark,ioana-delaney/spark,UndeadBaneGitHub/spark,metamx/spark,vax11780/spark,Aegeaner/spark,janewangfb/spark,minixalpha/spark,ConeyLiu/spark,vax11780/spark,zero323/spark,dbtsai/spark,brad-kaiser/spark,setjet/spark,brad-kaiser/spark,poffuomo/spark,akopich/spark,apache/spark,rednaxelafx/apache-spark,MLnick/spark,big-pegasus/spark,goldmedal/spark,skonto/spark,tejasapatil/spark,rekhajoshm/spark,ptkool/spark,big-pegasus/spark,ericvandenbergfb/spark,taroplus/spark,liyichao/spark,adrian-ionescu/apache-spark,vinodkc/spark,brad-kaiser/spark,facaiy/spark,haowu80s/spark,rednaxelafx/apache-spark,highfei2011/spark,lyogavin/spark,setjet/spark,chuckchen/spark,sahilTakiar/spark,witgo/spark,jlopezmalla/spark,bravo-zhang/spark,kevinyu98/spark,minixalpha/spark,ajaysaini725/spark,adrian-ionescu/apache-spark,SHASHANKB/spark,hvanhovell/spark,nchammas/spark,zuotingbing/spark,bOOm-X/spark,highfei2011/spark,shuangshuangwang/spark,mzl9039/spark,bdrillard/spark,mkolod/incubator-spark,kissmetrics/spark,big-pegasus/spark,ahnqirage/spark,saturday-shi/spark,publicRoman/spark,michalsenkyr/spark,narahari92/spark,Panos-Bletsos/spark-cost-model-optimizer,pronix/spark,ueshin/apache-spark,narahari92/spark,witgo/spark,rjpower/spark,jrshust/spark,ahnqirage/spark,kissmetrics/spark,bravo-zhang/spark,wzhfy/spark,pgandhi999/spark,icexelloss/spark,techaddict/spark,kevinyu98/spark,alunarbeach/spark,brad-kaiser/spark,patrick-nicholson/spark,darionyaphet/spark,eyalfa/spark,mahak/spark,jlopezmalla/spark,bravo-zhang/spark,szhem/spark,wzhfy/spark,pgandhi999/spark,techaddict/spark,mahak/spark,wangyum/spark,dhruve/spark,UndeadBaneGitHub/spark,minixalpha/spark,cloudera/spark,cin/spark,cloud-fan/spark,gengliangwang/spark,WeichenXu123/spark,dhruve/spark,michalsenkyr/spark,liutang123/spark,eyalfa/spark,rezasafi/spark,highfei2011/spark,poffuomo/spark,UndeadBaneGitHub/spark,mkolod/incubator-spark,Panos-Bletsos/spark-cost-model-optimizer,adrian-ionescu/apache-spark,ericvandenbergfb/spark,apache-spark-on-k8s/spark,actuaryzhang/spark,holdenk/spark,gioenn/xSpark,shubhamchopra/spark,bravo-zhang/spark,darionyaphet/spark,yanboliang/spark,jlopezmalla/spark,andrewor14/iolap,sryza/spark,setjet/spark,hvanhovell/spark,mdespriee/spark,debugger87/spark,tengpeng/spark,andrewor14/iolap,facaiy/spark,1haodian/spark,sryza/spark,haowu80s/spark,jkbradley/spark,nlalevee/spark,jiangxb1987/spark,vinodkc/spark,dongjoon-hyun/spark,SnappyDataInc/spark,someorz/spark,nilsgrabbert/spark,UndeadBaneGitHub/spark,jianran/spark,hhbyyh/spark,panfengfeng/spark,lyogavin/spark,gengliangwang/spark,ajaysaini725/spark,pgandhi999/spark,alunarbeach/spark,szhem/spark,eyalfa/spark,vinodkc/spark,wzhfy/spark,kissmetrics/spark,mkolod/incubator-spark,zero323/spark,bOOm-X/spark,michalsenkyr/spark,mike0sv/spark,janewangfb/spark,ioana-delaney/spark,map222/spark,sachintyagi22/spark,aokolnychyi/spark,zero323/spark,maropu/spark,apache/spark,taroplus/spark,Panos-Bletsos/spark-cost-model-optimizer,skonto/spark,jkbradley/spark,shubhamchopra/spark,gioenn/xSpark,shaneknapp/spark,bOOm-X/spark,BryanCutler/spark,bOOm-X/spark,panfengfeng/spark,SnappyDataInc/spark,yanboliang/spark,caneGuy/spark,hhbyyh/spark,wangyum/spark,ueshin/apache-spark,ajaysaini725/spark,szhem/spark,ddna1021/spark,gengliangwang/spark,guoxiaolongzte/spark,ajaysaini725/spark,facaiy/spark,markhamstra/spark,map222/spark,debugger87/spark,ptkool/spark,rezasafi/spark,ddna1021/spark,jrshust/spark,narahari92/spark,stanzhai/spark,publicRoman/spark,zhouyejoe/spark,tengpeng/spark,WeichenXu123/spark,saturday-shi/spark,sahilTakiar/spark,poffuomo/spark,ericvandenbergfb/spark,rezasafi/spark,rikima/spark,jianran/spark,tejasapatil/spark,ioana-delaney/spark,esi-mineset/spark,actuaryzhang/spark,xuanyuanking/spark,xuanyuanking/spark,rjpower/spark,goldmedal/spark,srowen/spark,ajaysaini725/spark,liyichao/spark,alunarbeach/spark,gioenn/xSpark,spark-test/spark,szhem/spark,MLnick/spark,goldmedal/spark,aosagie/spark,rikima/spark,pronix/spark,LantaoJin/spark,jiangxb1987/spark,srowen/spark,esi-mineset/spark,publicRoman/spark,rjpower/spark,WindCanDie/spark,holdenk/spark,lxsmnv/spark,someorz/spark,WeichenXu123/spark,shubhamchopra/spark,tejasapatil/spark,guoxiaolongzte/spark,aray/spark,MLnick/spark,spark-test/spark,someorz/spark,JerryLead/spark,sahilTakiar/spark,xuanyuanking/spark,stanzhai/spark,apache/spark,Aegeaner/spark,patrick-nicholson/spark,skonto/spark,highfei2011/spark,LantaoJin/spark,shaneknapp/spark,facaiy/spark,sachintyagi22/spark,caneGuy/spark,tejasapatil/spark,JoshRosen/spark,andrewor14/spark,debugger87/spark,LantaoJin/spark,jianran/spark,techaddict/spark,milliman/spark,mzl9039/spark,ConeyLiu/spark,kevinyu98/spark,wangyum/spark,actuaryzhang/spark,nlalevee/spark,liyichao/spark,actuaryzhang/spark,WindCanDie/spark,rikima/spark,dotunolafunmiloye/spark,rikima/spark,metamx/spark,ibm-research-ireland/sparkoscope,zhouyejoe/spark,ddna1021/spark,nlalevee/spark,akopich/spark,lxsmnv/spark,rikima/spark,srowen/spark,shubhamchopra/spark,huang1900/spark,spark-test/spark,joseph-torres/spark,sryza/spark,liutang123/spark,sureshthalamati/spark,sachintyagi22/spark,SHASHANKB/spark,akopich/spark,brad-kaiser/spark,vax11780/spark,tejasapatil/spark,UndeadBaneGitHub/spark,nchammas/spark,dhruve/spark,sureshthalamati/spark,ajaysaini725/spark,mdespriee/spark,SnappyDataInc/spark,skonto/spark,michalsenkyr/spark,BryanCutler/spark,zuotingbing/spark,shubhamchopra/spark,jiangxb1987/spark,ConeyLiu/spark,MLnick/spark,jrshust/spark,milliman/spark,nchammas/spark,sachintyagi22/spark,guoxiaolongzte/spark,poffuomo/spark,liyichao/spark,andrewor14/spark,dongjoon-hyun/spark,byakuinss/spark,liutang123/spark,map222/spark,kevinyu98/spark,zuotingbing/spark,eyalfa/spark,pronix/spark,maropu/spark,pronix/spark,gioenn/xSpark,bravo-zhang/spark,HyukjinKwon/spark,rezasafi/spark,kiszk/spark,JerryLead/spark,tengpeng/spark,jlopezmalla/spark,kissmetrics/spark,patrick-nicholson/spark,mahak/spark,WeichenXu123/spark,actuaryzhang/spark,SnappyDataInc/spark,markhamstra/spark,Aegeaner/spark,dotunolafunmiloye/spark,apache-spark-on-k8s/spark,aokolnychyi/spark,apache-spark-on-k8s/spark,mike0sv/spark,alunarbeach/spark,SnappyDataInc/spark,joseph-torres/spark,matthewfranglen/spark,mzl9039/spark,nilsgrabbert/spark,kissmetrics/spark,shubhamchopra/spark,huang1900/spark,mike0sv/spark,wangyum/spark,shuangshuangwang/spark,rezasafi/spark,jlopezmalla/spark,xflin/spark,wangmiao1981/spark,MLnick/spark,ioana-delaney/spark,ericvandenbergfb/spark,akopich/spark,debugger87/spark,jlopezmalla/spark,hvanhovell/spark,rikima/spark,ioana-delaney/spark,guoxiaolongzte/spark,kiszk/spark,cloud-fan/spark,icexelloss/spark,aokolnychyi/spark,byakuinss/spark,saltstar/spark,ibm-research-ireland/sparkoscope,cloudera/spark,panfengfeng/spark,lxsmnv/spark,wgpshashank/spark,huang1900/spark,spark-test/spark,goldmedal/spark,zzcclp/spark,ueshin/apache-spark,lvdongr/spark,goldmedal/spark,lvdongr/spark,kimoonkim/spark,Aegeaner/spark,liyichao/spark,kimoonkim/spark,apache-spark-on-k8s/spark,JoshRosen/spark,shuangshuangwang/spark,mzl9039/spark,xflin/spark,metamx/spark,ueshin/apache-spark,liutang123/spark,jiangxb1987/spark,haowu80s/spark,srowen/spark,yanboliang/spark,szhem/spark,saltstar/spark,rekhajoshm/spark,hvanhovell/spark,mike0sv/spark,zhouyejoe/spark,panfengfeng/spark,nlalevee/spark,caneGuy/spark,Aegeaner/spark,mike0sv/spark,kiszk/spark,zhouyejoe/spark,rikima/spark,BryanCutler/spark,ddna1021/spark,spark-test/spark,wzhfy/spark,jiangxb1987/spark,aray/spark,aosagie/spark,WindCanDie/spark,rekhajoshm/spark,witgo/spark,1haodian/spark,Panos-Bletsos/spark-cost-model-optimizer,zero323/spark,1haodian/spark,gengliangwang/spark,aosagie/spark,nilsgrabbert/spark,bOOm-X/spark,HyukjinKwon/spark,mdespriee/spark,gioenn/xSpark,pgandhi999/spark,lvdongr/spark,janewangfb/spark,jlopezmalla/spark,zuotingbing/spark,adrian-ionescu/apache-spark,techaddict/spark,cloudera/spark,shubhamchopra/spark,saturday-shi/spark,LantaoJin/spark,cloud-fan/spark,akopich/spark,lyogavin/spark,witgo/spark,goldmedal/spark,ahnqirage/spark,zero323/spark,WindCanDie/spark,nchammas/spark,cloud-fan/spark,panfengfeng/spark,markhamstra/spark,esi-mineset/spark,bOOm-X/spark,jiangxb1987/spark,wangyum/spark,vax11780/spark,big-pegasus/spark,big-pegasus/spark,andrewor14/iolap,map222/spark,gioenn/xSpark