Prevent multiple archivers from starting.  Backpatch to 8.1.X.
Prevent multiple archivers from starting.  Backpatch to 8.1.X.

Simon Riggs

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