我们有hadoop个群集，其中包含3台数据节点计算机
我们从第一个namenode
我们在HDFS配置中将副本配置为3个
但搜索了一段时间后，没有找到关于-Failed to place enough replicas: expected size is 1 but only 0的正确解决方案
2020-05-11 19:22:46,578 WARN protocol.BlockStoragePolicy (BlockStoragePolicy.java:chooseStorageTypes(162)) - Failed to place enough replicas: expected size is 1 but only 0 storage types can be selected (replication=3,selected=[],unavailable=[DISK],removed=[DISK],policy=BlockStoragePolicy{HOT:7,storageTypes=[DISK],creationFallbacks=[],replicationFallbacks=[ARCHIVE]})
2020-05-11 19:22:46,580 WARN protocol.BlockStoragePolicy (BlockStoragePolicy.java:chooseStorageTypes(162)) - Failed to place enough replicas: expected size is 1 but only 0 storage types can be selected (replication=3,581 WARN protocol.BlockStoragePolicy (BlockStoragePolicy.java:chooseStorageTypes(162)) - Failed to place enough replicas: expected size is 1 but only 0 storage types can be selected (replication=3,582 WARN protocol.BlockStoragePolicy (BlockStoragePolicy.java:chooseStorageTypes(162)) - Failed to place enough replicas: expected size is 1 but only 0 storage types can be selected (replication=3,replicationFallbacks=[ARCHIVE]})
知道这个行为的原因是什么？