add the comments about SPARK_WORKER_DIR
add the comments about SPARK_WORKER_DIR

this env variable seems to be forgotten …

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