Port HDFS-4878 to branch-0.23.9.
Port HDFS-4878 to branch-0.23.9.

git-svn-id: 18f68cb356f2bf53a217c39a7af1470588d83bce@1492449 13f79535-47bb-0310-9956-ffa450edef68

laxman-ch/hadoop,laxman-ch/hadoop,StephanieMak/hadoop,steveloughran/hadoop,MeiSheng/hadoop,gilv/hadoop,ronny-macmaster/hadoop,StephanieMak/hadoop,xujianhai/hadoop,tianshouzhi/hadoop,dennishuo/hadoop,ading1977/hadoop,hastimal/hadoop,pkdevbox/hadoop,dilaver/hadoop,zengzhaozheng/hadoop,IBYoung/hadoop,apache/hadoop,ucare-uchicago/hadoop,ctrezzo/hadoop,hash-X/hadoop,dierobotsdie/hadoop,weipinghe/hadoop,hash-X/hadoop,gilv/hadoop,xujianhai/hadoop,odpi/hadoop,odpi/hadoop,lzo/hadoop,nandakumar131/hadoop,plusplusjiajia/hadoop,pkit/hadoop,szegedim/hadoop,MobinRanjbar/hadoop,chetan-anand/hadoop,abhishekagarwal87/hadoop,zjshen/hadoop-YARN-2928-POC,pritishppai/hadoop,rohanwaghere/hadoop,laxman-ch/hadoop,bitmybytes/hadoop,slchen2014/hadoop,khiraiwa/hadoop,ronny-macmaster/hadoop,apurtell/hadoop,1tylermitchell/hadoop,yanbit/hadoop,dilaver/hadoop,Winiex/hadoop,bysslord/hadoop,pkit/hadoop,eonezhang/hadoop,ronny-macmaster/hadoop,dossett/hadoop,hjk41/hadoop,sroegner/hadoop,simbadzina/hadoop-fcfs,bysslord/hadoop,dierobotsdie/hadoop,dhootha/hadoop,pritishppai/hadoop,ChetnaChaudhari/hadoop,allfro/hadoop,szegedim/hadoop,xuchenCN/hadoop,slchen2014/hadoop,hash-X/hadoop,cnfire/hadoop,adouang/hadoop,Elbehery/hadoop,lukmajercak/hadoop,lukmajercak/hadoop,dossett/hadoop,oza/hadoop,Ethanlm/hadoop,HazelChen/hadoop,soumabrata-chakraborty/hadoop,jjj117/hadoop,oza/hadoop,korrelate/hadoop,legend-hua/hadoop,samuelan/hadoop,OnePaaS/hadoop,apache/hadoop,messi49/hadoop,LoQIStar/hadoop,HazelChen/hadoop,hjk41/hadoop,NightWolf007/hadoop,lightslife/hadoop,samuelan/hadoop,chenliang613/hadoop,vesense/hadoop,lawrencewu/hadoop,ucare-uchicago/hadoop,khiraiwa/hadoop,harshavmb/hadoop,xujianhai/hadoop,anjuncc/hadoop,faspl/hadoop,zengzhaozheng/hadoop,dierobotsdie/hadoop,sasa233/hadoop,rohanwaghere/hadoop,venkateshu/hadoop,Authorlove/hadoop,faspl/hadoop,WIgor/hadoop,djalova/hadoop,apurtell/hadoop,plusplusjiajia/hadoop,lawrencewu/hadoop,gilv/hadoop,chenliang613/hadoop,zengzhaozheng/hadoop,allfro/hadoop,sujeetv/hadoop,matrix-stone/hadoop,vlajos/hadoop,fullcontact/hadoop,binn-yang/hadoop,dongjiaqiang/hadoop,skinzer/hadoop,allfro/hadoop,nandakumar131/hadoop,taoguan/hadoop,Ethanlm/hadoop,GeLiXin/hadoop,SwathiMystery/hadoop,dennishuo/hadoop,apurtell/hadoop,MetSystem/hadoop,OnePaaS/hadoop,cryptickp/hadoop,nandakumar131/hadoop,anjuncc/hadoop,szegedim/hadoop,taoguan/hadoop,IBYoung/hadoop,vesense/hadoop,simbadzina/hadoop-fcfs,fullcontact/hadoop,1tylermitchell/hadoop,StephanieMak/hadoop,zjshen/hadoop-YARN-2928-POC,dxd132630/hadoop,979969786/hadoop,Winiex/hadoop,soumabrata-chakraborty/hadoop,cnfire/hadoop,frdeso/hadoop,ronny-macmaster/hadoop,EasonYi/hadoop,hjk41/hadoop,apache/hadoop,neo-hu/hadoop,likaiwalkman/hadoop,samuelan/hadoop,adouang/hadoop,pkit/hadoop,liutizhong/hadoop,oza/hadoop,MetSystem/hadoop,apache/hadoop,huafengw/hadoop,slchen2014/hadoop,wwjiang007/hadoop,sasa233/hadoop,MetSystem/hadoop,ChetnaChaudhari/hadoop,pkdevbox/hadoop,sujeetv/hadoop,weipinghe/hadoop,leftnoteasy/hadoop-1,ctrezzo/hadoop,soumabrata-chakraborty/hadoop,plusplusjiajia/hadoop,GeLiXin/hadoop,piaoyu/hadoop,IBYoung/hadoop,xiao-chen/hadoop,chetan-anand/hadoop,anjuncc/hadoop,bitmybytes/hadoop,skinzer/hadoop,lukmajercak/hadoop,lzo/hadoop,jingjidejuren/hadoop,EasonYi/hadoop,korrelate/hadoop,979969786/hadoop,jjj117/hadoop,nandakumar131/hadoop,WIgor/hadoop,lzo/hadoop,dilaver/hadoop,vesense/hadoop,harshavmb/hadoop,1tylermitchell/hadoop,sujeetv/hadoop,JingchengDu/hadoop,ctrezzo/hadoop,MobinRanjbar/hadoop,grokcoder/hadoop,khiraiwa/hadoop,szegedim/hadoop,Ethanlm/hadoop,MetSystem/hadoop,simbadzina/hadoop-fcfs,binn-yang/hadoop,venkateshu/hadoop,MeiSheng/hadoop,khiraiwa/hadoop,pkit/hadoop,StephanieMak/hadoop,sasa233/hadoop,chetan-anand/hadoop,steveloughran/hadoop,leftnoteasy/hadoop-1,dierobotsdie/hadoop,frdeso/hadoop,GeLiXin/hadoop,binn-yang/hadoop,adouang/hadoop,wenxinhe/hadoop,jjj117/hadoop,messi49/hadoop,saydulk/hadoop,jingjidejuren/hadoop,abhishekagarwal87/hadoop,legend-hua/hadoop,EasonYi/hadoop,neo-hu/hadoop,zjshen/hadoop-YARN-2928-POC,allfro/hadoop,qqming113/hadoop,steveloughran/hadoop,piaoyu/hadoop,chenliang613/hadoop,sasa233/hadoop,wenxinhe/hadoop,samuelan/hadoop,pkdevbox/hadoop,abhishekagarwal87/hadoop,xujianhai/hadoop,eonezhang/hadoop,szegedim/hadoop,flyrain/hadoop,apache/hadoop,zengzhaozheng/hadoop,apurtell/hadoop,cryptickp/hadoop,tianshouzhi/hadoop,korrelate/hadoop,WIgor/hadoop,dongjiaqiang/hadoop,binn-yang/hadoop,zhe-thoughts/hadoop,simbadzina/hadoop-fcfs,sujeetv/hadoop,huafengw/hadoop,OnePaaS/hadoop,Elbehery/hadoop,leftnoteasy/hadoop-1,Elbehery/hadoop,WIgor/hadoop,zhe-thoughts/hadoop,frdeso/hadoop,JingchengDu/hadoop,odpi/hadoop,jth/hadoop,dongjiaqiang/hadoop,OnePaaS/hadoop,MobinRanjbar/hadoop,hash-X/hadoop,1tylermitchell/hadoop,djalova/hadoop,grokcoder/hadoop,bysslord/hadoop,neo-hu/hadoop,busbey/hadoop,xiao-chen/hadoop,malli3131/hadoop-1,laxman-ch/hadoop,malli3131/hadoop-1,steveloughran/hadoop,samuelan/hadoop,samuelan/hadoop,LoQIStar/hadoop,ouyangjie/hadoop,StephanieMak/hadoop,hjk41/hadoop,sroegner/hadoop,zjshen/hadoop-YARN-2928-POC,venkateshu/hadoop,EdwinChanYi/hadoop,lzo/hadoop,hjk41/hadoop,ronny-macmaster/hadoop,neo-hu/hadoop,tianshouzhi/hadoop,wwjiang007/hadoop,EasonYi/hadoop,oza/hadoop,fullcontact/hadoop,MobinRanjbar/hadoop,fullcontact/hadoop,wwjiang007/hadoop,SwathiMystery/hadoop,NightWolf007/hadoop,cnfire/hadoop,chetan-anand/hadoop,ronny-macmaster/hadoop,rohanwaghere/hadoop,dilaver/hadoop,taoguan/hadoop,EdwinChanYi/hadoop,abhishekagarwal87/hadoop,lukmajercak/hadoop,faspl/hadoop,pkit/hadoop,djalova/hadoop,faspl/hadoop,xujianhai/hadoop,OnePaaS/hadoop,skinzer/hadoop,Elbehery/hadoop,ChetnaChaudhari/hadoop,flyrain/hadoop,nandakumar131/hadoop,pkdevbox/hadoop,IBYoung/hadoop,saydulk/hadoop,EasonYi/hadoop,piaoyu/hadoop,GeLiXin/hadoop,lawrencewu/hadoop,Winiex/hadoop,bitmybytes/hadoop,jjj117/hadoop,bysslord/hadoop,mapr/hadoop-common,dxd132630/hadoop,NightWolf007/hadoop,xiao-chen/hadoop,zhe-thoughts/hadoop,Authorlove/hadoop,busbey/hadoop,jingjidejuren/hadoop,laxman-ch/hadoop,IBYoung/hadoop,yanbit/hadoop,nandakumar131/hadoop,ChetnaChaudhari/hadoop,vesense/hadoop,pkdevbox/hadoop,OnePaaS/hadoop,matrix-stone/hadoop,grokcoder/hadoop,huafengw/hadoop,ucare-uchicago/hadoop,HazelChen/hadoop,f7753/hadoop,Ethanlm/hadoop,SwathiMystery/hadoop,cryptickp/hadoop,oza/hadoop,zjshen/hadoop-YARN-2928-POC,leftnoteasy/hadoop-1,MeiSheng/hadoop,liutizhong/hadoop,hjk41/hadoop,jth/hadoop,dxd132630/hadoop,dhootha/hadoop,allfro/hadoop,neo-hu/hadoop,zengzhaozheng/hadoop,dxd132630/hadoop,flyrain/hadoop,lightslife/hadoop,skinzer/hadoop,WIgor/hadoop,messi49/hadoop,NightWolf007/hadoop,frdeso/hadoop,malli3131/hadoop-1,dierobotsdie/hadoop,plusplusjiajia/hadoop,yanbit/hadoop,jingjidejuren/hadoop,Authorlove/hadoop,ucare-uchicago/hadoop,LoQIStar/hadoop,ucare-uchicago/hadoop,messi49/hadoop,f7753/hadoop,EdwinChanYi/hadoop,piaoyu/hadoop,littlezhou/hadoop,hastimal/hadoop,odpi/hadoop,jth/hadoop,mapr/hadoop-common,ouyangjie/hadoop,sujeetv/hadoop,steveloughran/hadoop,taoguan/hadoop,1tylermitchell/hadoop,ading1977/hadoop,korrelate/hadoop,GeLiXin/hadoop,piaoyu/hadoop,lukmajercak/hadoop,WIgor/hadoop,mapr/hadoop-common,djalova/hadoop,venkateshu/hadoop,xiao-chen/hadoop,littlezhou/hadoop,Elbehery/hadoop,rohanwaghere/hadoop,bitmybytes/hadoop,rohanwaghere/hadoop,dxd132630/hadoop,matrix-stone/hadoop,sroegner/hadoop,HazelChen/hadoop,xujianhai/hadoop,SwathiMystery/hadoop,ucare-uchicago/hadoop,gilv/hadoop,hash-X/hadoop,allfro/hadoop,ading1977/hadoop,tianshouzhi/hadoop,bysslord/hadoop,faspl/hadoop,weipinghe/hadoop,lzo/hadoop,weipinghe/hadoop,yanbit/hadoop,lukmajercak/hadoop,pritishppai/hadoop,lightslife/hadoop,qqming113/hadoop,HazelChen/hadoop,faspl/hadoop,neo-hu/hadoop,adouang/hadoop,ChetnaChaudhari/hadoop,taoguan/hadoop,saydulk/hadoop,binn-yang/hadoop,xuchenCN/hadoop,zengzhaozheng/hadoop,MetSystem/hadoop,odpi/hadoop,skinzer/hadoop,dhootha/hadoop,ouyangjie/hadoop,dxd132630/hadoop,NightWolf007/hadoop,dongjiaqiang/hadoop,tianshouzhi/hadoop,plusplusjiajia/hadoop,1tylermitchell/hadoop,gilv/hadoop,matrix-stone/hadoop,bysslord/hadoop,Elbehery/hadoop,pkdevbox/hadoop,qqming113/hadoop,apurtell/hadoop,xuchenCN/hadoop,khiraiwa/hadoop,neo-hu/hadoop,flyrain/hadoop,legend-hua/hadoop,NightWolf007/hadoop,xuchenCN/hadoop,messi49/hadoop,MobinRanjbar/hadoop,bitmybytes/hadoop,eonezhang/hadoop,ouyangjie/hadoop,busbey/hadoop,sasa233/hadoop,soumabrata-chakraborty/hadoop,JingchengDu/hadoop,malli3131/hadoop-1,ChetnaChaudhari/hadoop,pkit/hadoop,plusplusjiajia/hadoop,grokcoder/hadoop,wenxinhe/hadoop,pritishppai/hadoop,Winiex/hadoop,Authorlove/hadoop,grokcoder/hadoop,grokcoder/hadoop,dongjiaqiang/hadoop,cnfire/hadoop,anjuncc/hadoop,slchen2014/hadoop,pritishppai/hadoop,jjj117/hadoop,legend-hua/hadoop,mapr/hadoop-common,abhishekagarwal87/hadoop,979969786/hadoop,dierobotsdie/hadoop,lightslife/hadoop,plusplusjiajia/hadoop,liutizhong/hadoop,Ethanlm/hadoop,xiao-chen/hadoop,LoQIStar/hadoop,korrelate/hadoop,flyrain/hadoop,xuchenCN/hadoop,lightslife/hadoop,dilaver/hadoop,venkateshu/hadoop,wenxinhe/hadoop,zhe-thoughts/hadoop,harshavmb/hadoop,dongjiaqiang/hadoop,dxd132630/hadoop,ctrezzo/hadoop,EasonYi/hadoop,vesense/hadoop,rohanwaghere/hadoop,hastimal/hadoop,GeLiXin/hadoop,HazelChen/hadoop,soumabrata-chakraborty/hadoop,Ethanlm/hadoop,liutizhong/hadoop,pkit/hadoop,pritishppai/hadoop,f7753/hadoop,cnfire/hadoop,huafengw/hadoop,ouyangjie/hadoop,harshavmb/hadoop,szegedim/hadoop,bitmybytes/hadoop,ChetnaChaudhari/hadoop,ading1977/hadoop,chenliang613/hadoop,flyrain/hadoop,lawrencewu/hadoop,hjk41/hadoop,apache/hadoop,wenxinhe/hadoop,MeiSheng/hadoop,EdwinChanYi/hadoop,apache/hadoop,szegedim/hadoop,saydulk/hadoop,weipinghe/hadoop,chetan-anand/hadoop,1tylermitchell/hadoop,weipinghe/hadoop,liutizhong/hadoop,huafengw/hadoop,vesense/hadoop,sroegner/hadoop,dennishuo/hadoop,dennishuo/hadoop,samuelan/hadoop,busbey/hadoop,odpi/hadoop,WIgor/hadoop,simbadzina/hadoop-fcfs,SwathiMystery/hadoop,hastimal/hadoop,skinzer/hadoop,mapr/hadoop-common,abhishekagarwal87/hadoop,Winiex/hadoop,chenliang613/hadoop,simbadzina/hadoop-fcfs,laxman-ch/hadoop,liutizhong/hadoop,Authorlove/hadoop,oza/hadoop,mapr/hadoop-common,djalova/hadoop,Ethanlm/hadoop,frdeso/hadoop,soumabrata-chakraborty/hadoop,zhe-thoughts/hadoop,zhe-thoughts/hadoop,979969786/hadoop,malli3131/hadoop-1,LoQIStar/hadoop,fullcontact/hadoop,lukmajercak/hadoop,lawrencewu/hadoop,zjshen/hadoop-YARN-2928-POC,HazelChen/hadoop,f7753/hadoop,likaiwalkman/hadoop,jth/hadoop,hash-X/hadoop,zengzhaozheng/hadoop,leftnoteasy/hadoop-1,abhishekagarwal87/hadoop,adouang/hadoop,wwjiang007/hadoop,IBYoung/hadoop,likaiwalkman/hadoop,likaiwalkman/hadoop,binn-yang/hadoop,skinzer/hadoop,adouang/hadoop,jth/hadoop,dossett/hadoop,MeiSheng/hadoop,ctrezzo/hadoop,pritishppai/hadoop,odpi/hadoop,apurtell/hadoop,sroegner/hadoop,wwjiang007/hadoop,tianshouzhi/hadoop,leftnoteasy/hadoop-1,fullcontact/hadoop,dhootha/hadoop,qqming113/hadoop,jingjidejuren/hadoop,dhootha/hadoop,hastimal/hadoop,anjuncc/hadoop,yanbit/hadoop,busbey/hadoop,steveloughran/hadoop,littlezhou/hadoop,vlajos/hadoop,slchen2014/hadoop,f7753/hadoop,eonezhang/hadoop,messi49/hadoop,qqming113/hadoop,ucare-uchicago/hadoop,busbey/hadoop,JingchengDu/hadoop,ading1977/hadoop,lzo/hadoop,Winiex/hadoop,nandakumar131/hadoop,ading1977/hadoop,korrelate/hadoop,bysslord/hadoop,slchen2014/hadoop,yanbit/hadoop,chenliang613/hadoop,sasa233/hadoop,simbadzina/hadoop-fcfs,cryptickp/hadoop,SwathiMystery/hadoop,Winiex/hadoop,vlajos/hadoop,lzo/hadoop,pkdevbox/hadoop,djalova/hadoop,steveloughran/hadoop,vesense/hadoop,saydulk/hadoop,NightWolf007/hadoop,lightslife/hadoop,sroegner/hadoop,GeLiXin/hadoop,dossett/hadoop,flyrain/hadoop,gilv/hadoop,vlajos/hadoop,dennishuo/hadoop,liutizhong/hadoop,EasonYi/hadoop,jth/hadoop,malli3131/hadoop-1,EdwinChanYi/hadoop,StephanieMak/hadoop,legend-hua/hadoop,wwjiang007/hadoop,MetSystem/hadoop,taoguan/hadoop,frdeso/hadoop,dilaver/hadoop,bysslord/hadoop,tianshouzhi/hadoop,grokcoder/hadoop,979969786/hadoop,apurtell/hadoop,LoQIStar/hadoop,xujianhai/hadoop,littlezhou/hadoop,lightslife/hadoop,JingchengDu/hadoop,hastimal/hadoop,cnfire/hadoop,chetan-anand/hadoop,busbey/hadoop,dongjiaqiang/hadoop,xiao-chen/hadoop,yanbit/hadoop,ctrezzo/hadoop,jjj117/hadoop,ronny-macmaster/hadoop,sujeetv/hadoop,qqming113/hadoop,sroegner/hadoop,littlezhou/hadoop,sasa233/hadoop,soumabrata-chakraborty/hadoop,jth/hadoop,dossett/hadoop,legend-hua/hadoop,harshavmb/hadoop,cnfire/hadoop,dennishuo/hadoop,korrelate/hadoop,rohanwaghere/hadoop,littlezhou/hadoop,vlajos/hadoop,saydulk/hadoop,f7753/hadoop,chetan-anand/hadoop,jingjidejuren/hadoop,likaiwalkman/hadoop,xiao-chen/hadoop,MeiSheng/hadoop,EdwinChanYi/hadoop,JingchengDu/hadoop,lawrencewu/hadoop,piaoyu/hadoop,dierobotsdie/hadoop,cryptickp/hadoop,taoguan/hadoop,anjuncc/hadoop,oza/hadoop,zjshen/hadoop-YARN-2928-POC,messi49/hadoop,huafengw/hadoop,Authorlove/hadoop,matrix-stone/hadoop,IBYoung/hadoop,vlajos/hadoop,matrix-stone/hadoop,dhootha/hadoop,wenxinhe/hadoop,LoQIStar/hadoop,979969786/hadoop,qqming113/hadoop,laxman-ch/hadoop,hash-X/hadoop,jth/hadoop,venkateshu/hadoop,eonezhang/hadoop,dossett/hadoop,khiraiwa/hadoop,MobinRanjbar/hadoop,adouang/hadoop,matrix-stone/hadoop,StephanieMak/hadoop,messi49/hadoop,cryptickp/hadoop,eonezhang/hadoop,wwjiang007/hadoop,piaoyu/hadoop,979969786/hadoop,korrelate/hadoop,jingjidejuren/hadoop,mapr/hadoop-common,venkateshu/hadoop,wenxinhe/hadoop,MobinRanjbar/hadoop,slchen2014/hadoop,likaiwalkman/hadoop,legend-hua/hadoop,ading1977/hadoop,dilaver/hadoop,ctrezzo/hadoop,dossett/hadoop,littlezhou/hadoop,SwathiMystery/hadoop,ouyangjie/hadoop,dennishuo/hadoop,khiraiwa/hadoop,saydulk/hadoop,bitmybytes/hadoop,frdeso/hadoop,simbadzina/hadoop-fcfs,allfro/hadoop,fullcontact/hadoop,OnePaaS/hadoop,eonezhang/hadoop,sujeetv/hadoop,f7753/hadoop,harshavmb/hadoop,JingchengDu/hadoop,chenliang613/hadoop,MeiSheng/hadoop,faspl/hadoop,hastimal/hadoop,xuchenCN/hadoop,djalova/hadoop,cryptickp/hadoop,likaiwalkman/hadoop,binn-yang/hadoop,anjuncc/hadoop,EdwinChanYi/hadoop,busbey/hadoop,vlajos/hadoop,Elbehery/hadoop,zhe-thoughts/hadoop,dhootha/hadoop,lawrencewu/hadoop,MetSystem/hadoop,ouyangjie/hadoop,malli3131/hadoop-1,huafengw/hadoop,gilv/hadoop,Authorlove/hadoop,weipinghe/hadoop,harshavmb/hadoop,xuchenCN/hadoop,jjj117/hadoop,leftnoteasy/hadoop-1