[root@ip-172-31-6-148~]# hadoop fs-put test.tar.gz/tmp17/11/2216:38:18WARNipc.Client:Failed to connect to server:ip-172-31-10-118.fayson.com/172.31.10.118:8020:tryonce and fail.java.net.ConnectException:Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)at s...
处理来自ApplicationManager的命令; ApplicationMaster: 数据切分; 为应用程序申请资源,并分配给内部任务; 任务监控和容错; Container: 对任务运行环境的抽象,封装了CPU、内存等多维资源以及环境变量、启动命令等任务运行相关信息; MR模块功能 ... ... 日志 启动日志文件目录 $HADOOP_HOME/logs; 日志格式 .out和.log ...
现象: node manager起不来, 执行mapreduce 程序hang住 namenode 进程状态查询 [root@hadp-master sbin]# jps 8608 ResourceManager 8257 NameNode 9268 Jps 8453 SecondaryNameNode datanode 进程状态查询 , 发现 nodemanager 没有起来 [root@hadp-node1 hadoop]# jps 4179 DataNode 4940 Jps namenode 单独起 nod...
现象: node manager起不来, 执行mapreduce 程序hang住 namenode 进程状态查询 [root@hadp-master sbin]# jps 8608 ResourceManager 8257 NameNode 9268 Jps 8453 SecondaryNameNode datanode 进程状态查询 , 发现 nodemanager 没有起来 [root@hadp-node1 hadoop]# jps 4179 DataNode 4940 Jps namenode 单独起 nod...
In a hadoop cluster, a node is shared with multiple services like datanode, region server etc. Suppose a node has 36GB of disk and it has 3 daemons running such as data node, node manager and region server. An admin may choose to give all 3 services equal memory. In this case, ...
(1)Hadoop-NN-01创建密钥: [zero@CentOS-Cluster-01 ~]$ ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/home/zero/.ssh/id_rsa): Created directory '/home/zero/.ssh'. Enter passphrase (empty for no passphrase): ...
hadoop源码学习之namenode启动 @ 整体流程 服务启动流程详解 pendingReplications datanodeManager replicationThread blockReportThread 概述 hdfs主要包括两类节点,namenode和datanode,所以hdfs的启动也就是这两类节点的启动. namenode管理者所有的datanode信息、数据块信息等,它是整个hdfs的核心,首先要启动namenode,然后再...
Node Manager health check script is not available or doesn't have execute permission, so not starting the node health script runner. AsyncDispatcher Registering class org.apache.hadoop.yarn.server.nodemanager.containermanager.container.ContainerEventType for class org.apache.hadoop.yarn.server.nodemanager...
在 Hadoop 初始化后，如果 NameNode 无法启动，可能是因为以下原因：配置错误：可能是配置文件中存在错误...
CACHE_MANAGER(CacheManagerSection):集中式缓存特性全局信息,集中式缓存特性是Hadoop-2.3.0为提升数据读性能引入的新特性; STRING_TABLE(StringTableSection):字符串到ID的映射表,维护目录/文件的Permission字符到ID的映射,节省存储空间。 NameNode执行CheckPoint时,遵循Protobuf定义及上述文件格式描述,重启加载FSImage时,同...