原因：
hdfs-site.xml中的配置为：
<property>
<name>dfs.datanode.du.reserved</name>
<value>400000000000</value>
</property>
<property>
阅读背景：
File /hbase could only be replicated to 0 nodes instead of minReplication (=1). There are 30 datanode(s) running and no node(s) are excluded in this operation.
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