hdfs Not enough replicas was chosen. Reason: {NO_REQUIRED_STORAGE_TYPE=1}

问题遇到的现象和发生背景

2022-07-24 09:33:24,978 INFO org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Not enough replicas was chosen. Reason: {NO_REQUIRED_STORAGE_TYPE=1}
2022-07-24 09:33:24,978 INFO org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Not enough replicas was chosen. Reason: {NO_REQUIRED_STORAGE_TYPE=1}

DN不够了，根据你的副本选的策略，找不到可用的DN来存放足够的副本数量

请问一下，最后是怎么解决的呀？