yarn rmadmin -transitionToActive --forcemanual rm1
cd /opt/cloudera/parcels/CDH/lib/zookeeper/bin/
./zkCli.sh -server IT-CDH-Node01:2181
查看是否存在殘留的ActiveBreadCrumb節點
ls /yarn-leader-election/yarnRM
#若輸出只有[ActiveBreadCrumb](正常應有[ActiveBreadCrumb, ActiveStandbyElectorLock])
deleteall /yarn-leader-election/yarnRM/ActiveBreadCrumb
deleteall /rmstore/ZKRMStateRoot/RMAppRoot
處理ACL權限問題(若刪除時報權限錯誤):
getAcl /rmstore/ZKRMStateRoot/RMAppRoot # 查看ACL
setAcl /rmstore/ZKRMStateRoot/RMAppRoot world:anyone:rwcda # 開放權限
deleteall /rmstore/ZKRMStateRoot/RMAppRoot # 再次刪除