具体修改：hadoop-env.sh
export HDFS_NAMENODE_OPTS="-Dhadoop.security.logger=INFO,RFAS - Xmx1024m" export HDFS_DATANODE_OPTS="-Dhadoop.security.logger=ERROR,RFAS -Xmx1024m" 2、NameNode 心跳并发配置 hdfs-site.xml The number of Namenode RPC server threads that listen to requests from clients. If dfs.namenode.servicerpc-address is not configured then Namenode RPC server threads listen to requests from all nodes. NameNode有一个工作线程池，用来处理不同DataNode的并发心跳以及客户端并发的元数据操作。对于大集群或者有大量客户端的集群来说，通常需要增大该参数。默认值是10。 <property> <name>dfs.namenode.handler.count</name> <value>21</value> </property> 企业经验 dfs.namenode.handler.count=20 ×