Datanode的日志中看到: 10/12/14 20:10:31 INFO hdfs.DFSClient: Could not obtain block blk_XXXXXXXXXXXXXXXXXXXXXX_YYYYYYYY from any node: java.io.IOException: No live nodes contain current block. Will get new block locations from namenode and retry...
有可能是Hadoop HDFS Datanode 达到了同时处理文件的上限，修改
<property>
<name>dfs.datanode.max.xcievers</name>
<value>4096</value>
</property>
然后重启datanode
