报错：

org.apache.hadoop.hdfs.DFSClient:Failed to close file

org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException)

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解决方法：

修改linux打开文件最大限制

echo "fs.file-max = 65535" >> /etc/sysctl.conf 
echo "* - nofile 65535" >> /etc/security/limits.conf
sysctl -p

ulimit -n

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修改hadoop配置

vi hdfs-site.xml

<property>
  <name>dfs.datanode.max.xcievers</name>
  <value>8192</value>
</property>

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