Clarify the HINT for 'checkpoint request failed', per recent complaint demonstrating that its intent wasn't obvious.
Clarify the HINT for 'checkpoint request failed', per recent complaint
demonstrating that its intent wasn't obvious.

foyzur/gpdb,postmind-net/postgres-xl,janebeckman/gpdb,snaga/postgres-xl,xuegang/gpdb,yazun/postgres-xl,zeroae/postgres-xl,lpetrov-pivotal/gpdb,0x0FFF/gpdb,kaknikhil/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,0x0FFF/gpdb,randomtask1155/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,kaknikhil/gpdb,atris/gpdb,tangp3/gpdb,xuegang/gpdb,lisakowen/gpdb,xuegang/gpdb,oberstet/postgres-xl,edespino/gpdb,atris/gpdb,rubikloud/gpdb,postmind-net/postgres-xl,yuanzhao/gpdb,xuegang/gpdb,tpostgres-projects/tPostgres,ahachete/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,edespino/gpdb,50wu/gpdb,rvs/gpdb,lintzc/gpdb,kmjungersen/PostgresXL,ovr/postgres-xl,zaksoup/gpdb,snaga/postgres-xl,edespino/gpdb,ahachete/gpdb,tpostgres-projects/tPostgres,ashwinstar/gpdb,Quikling/gpdb,randomtask1155/gpdb,janebeckman/gpdb,tangp3/gpdb,ashwinstar/gpdb,ovr/postgres-xl,Postgres-XL/Postgres-XL,yazun/postgres-xl,kaknikhil/gpdb,rvs/gpdb,oberstet/postgres-xl,ahachete/gpdb,royc1/gpdb,janebeckman/gpdb,kaknikhil/gpdb,ashwinstar/gpdb,lisakowen/gpdb,techdragon/Postgres-XL,CraigHarris/gpdb,randomtask1155/gpdb,tangp3/gpdb,lisakowen/gpdb,rvs/gpdb,randomtask1155/gpdb,jmcatamney/gpdb,edespino/gpdb,kaknikhil/gpdb,ashwinstar/gpdb,zaksoup/gpdb,postmind-net/postgres-xl,royc1/gpdb,arcivanov/postgres-xl,foyzur/gpdb,rvs/gpdb,50wu/gpdb,cjcjameson/gpdb,atris/gpdb,yuanzhao/gpdb,lisakowen/gpdb,cjcjameson/gpdb,Quikling/gpdb,Quikling/gpdb,CraigHarris/gpdb,janebeckman/gpdb,arcivanov/postgres-xl,Quikling/gpdb,janebeckman/gpdb,xuegang/gpdb,chrishajas/gpdb,zeroae/postgres-xl,foyzur/gpdb,kmjungersen/PostgresXL,50wu/gpdb,CraigHarris/gpdb,CraigHarris/gpdb,oberstet/postgres-xl,edespino/gpdb,rubikloud/gpdb,zaksoup/gpdb,tpostgres-projects/tPostgres,postmind-net/postgres-xl,edespino/gpdb,tangp3/gpdb,kaknikhil/gpdb,Chibin/gpdb,kaknikhil/gpdb,cjcjameson/gpdb,Quikling/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,foyzur/gpdb,pavanvd/postgres-xl,yuanzhao/gpdb,arcivanov/postgres-xl,chrishajas/gpdb,0x0FFF/gpdb,lintzc/gpdb,50wu/gpdb,yuanzhao/gpdb,xuegang/gpdb,tangp3/gpdb,jmcatamney/gpdb,xinzweb/gpdb,rubikloud/gpdb,pavanvd/postgres-xl,rubikloud/gpdb,lpetrov-pivotal/gpdb,cjcjameson/gpdb,foyzur/gpdb,techdragon/Postgres-XL,snaga/postgres-xl,randomtask1155/gpdb,0x0FFF/gpdb,Quikling/gpdb,zaksoup/gpdb,Chibin/gpdb,lpetrov-pivotal/gpdb,greenplum-db/gpdb,cjcjameson/gpdb,janebeckman/gpdb,yazun/postgres-xl,lisakowen/gpdb,janebeckman/gpdb,arcivanov/postgres-xl,arcivanov/postgres-xl,50wu/gpdb,arcivanov/postgres-xl,ashwinstar/gpdb,greenplum-db/gpdb,yuanzhao/gpdb,chrishajas/gpdb,0x0FFF/gpdb,adam8157/gpdb,Chibin/gpdb,ahachete/gpdb,randomtask1155/gpdb,lisakowen/gpdb,Chibin/gpdb,chrishajas/gpdb,kmjungersen/PostgresXL,xinzweb/gpdb,Postgres-XL/Postgres-XL,yuanzhao/gpdb,chrishajas/gpdb,50wu/gpdb,jmcatamney/gpdb,kmjungersen/PostgresXL,ovr/postgres-xl,ashwinstar/gpdb,tangp3/gpdb,techdragon/Postgres-XL,kmjungersen/PostgresXL,greenplum-db/gpdb,kaknikhil/gpdb,tpostgres-projects/tPostgres,lpetrov-pivotal/gpdb,zaksoup/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,edespino/gpdb,xuegang/gpdb,rubikloud/gpdb,rvs/gpdb,pavanvd/postgres-xl,Quikling/gpdb,Quikling/gpdb,snaga/postgres-xl,adam8157/gpdb,Chibin/gpdb,greenplum-db/gpdb,janebeckman/gpdb,royc1/gpdb,zeroae/postgres-xl,tpostgres-projects/tPostgres,randomtask1155/gpdb,CraigHarris/gpdb,zaksoup/gpdb,rvs/gpdb,pavanvd/postgres-xl,royc1/gpdb,techdragon/Postgres-XL,xuegang/gpdb,ashwinstar/gpdb,zeroae/postgres-xl,postmind-net/postgres-xl,Quikling/gpdb,lpetrov-pivotal/gpdb,pavanvd/postgres-xl,foyzur/gpdb,lpetrov-pivotal/gpdb,rvs/gpdb,CraigHarris/gpdb,yazun/postgres-xl,xinzweb/gpdb,yazun/postgres-xl,cjcjameson/gpdb,Chibin/gpdb,tangp3/gpdb,lintzc/gpdb,jmcatamney/gpdb,50wu/gpdb,0x0FFF/gpdb,Quikling/gpdb,xuegang/gpdb,chrishajas/gpdb,ovr/postgres-xl,lintzc/gpdb,atris/gpdb,tangp3/gpdb,lintzc/gpdb,adam8157/gpdb,jmcatamney/gpdb,janebeckman/gpdb,Postgres-XL/Postgres-XL,rubikloud/gpdb,50wu/gpdb,rvs/gpdb,Chibin/gpdb,ahachete/gpdb,lintzc/gpdb,foyzur/gpdb,0x0FFF/gpdb,randomtask1155/gpdb,xinzweb/gpdb,rubikloud/gpdb,greenplum-db/gpdb,adam8157/gpdb,lintzc/gpdb,CraigHarris/gpdb,lisakowen/gpdb,lintzc/gpdb,Postgres-XL/Postgres-XL,greenplum-db/gpdb,zaksoup/gpdb,xinzweb/gpdb,chrishajas/gpdb,ovr/postgres-xl,greenplum-db/gpdb,ahachete/gpdb,edespino/gpdb,Postgres-XL/Postgres-XL,ahachete/gpdb,Chibin/gpdb,oberstet/postgres-xl,rubikloud/gpdb,adam8157/gpdb,ashwinstar/gpdb,snaga/postgres-xl,jmcatamney/gpdb,ahachete/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,foyzur/gpdb,Chibin/gpdb,kaknikhil/gpdb,rvs/gpdb,royc1/gpdb,xinzweb/gpdb,adam8157/gpdb,royc1/gpdb,oberstet/postgres-xl,edespino/gpdb,0x0FFF/gpdb,yuanzhao/gpdb,zaksoup/gpdb,lintzc/gpdb,yuanzhao/gpdb,chrishajas/gpdb,edespino/gpdb,rvs/gpdb,atris/gpdb,kaknikhil/gpdb,atris/gpdb,jmcatamney/gpdb,royc1/gpdb,CraigHarris/gpdb,royc1/gpdb,atris/gpdb,Chibin/gpdb,adam8157/gpdb,adam8157/gpdb,atris/gpdb,zeroae/postgres-xl,CraigHarris/gpdb,cjcjameson/gpdb,xinzweb/gpdb,xinzweb/gpdb