SPARK-541: Adding a warning for invalid Master URL
SPARK-541: Adding a warning for invalid Master URL

Right now Spark silently parses master URL's which do not match any
known regex as a Mesos URL. The Mesos error message when an invalid URL gets
passed is really confusing, so this warns the user when the implicit
conversion is happening.

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