hadoop的datanode没有启动

Question

我正在使用ubuntu 14.04 LTS Java版本8和Hadoop 2.5.1进行安装.我按照本指南安装了所有组件.很抱歉没有使用michael noll's.现在我遇到的问题是当我做start-dfs.sh时,我收到以下消息

oroborus@Saras-Dell-System-XPS-L502X:~$ start-dfs.sh <br>
14/11/12 16:12:33 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable<br>
Starting namenodes on [localhost]<br>
localhost: starting namenode, logging to /usr/local/hadoop/logs/hadoop-oroborus-namenode-Saras-Dell-System-XPS-L502X.out<br>
localhost: starting datanode, logging to /usr/local/hadoop/logs/hadoop-oroborus-datanode-Saras-Dell-System-XPS-L502X.out<br>
Starting secondary namenodes [0.0.0.0]<br>
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/logs/hadoop-oroborus-secondarynamenode-Saras-Dell-System-XPS-L502X.out<br>
14/11/12 16:12:48 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable<br>

现在运行start-yarn.sh(看起来工作正常)和jps我得到以下输出

oroborus@Saras-Dell-System-XPS-L502X:~$ jps
9090 NodeManager
5107 JobHistoryServer
8952 ResourceManager
12442 Jps
11981 NameNode

理想的输出应该有datanode,但它不存在.谷歌搜索和SOing有点我发现错误在日志中被淹没所以这里是datanode的日志.(只有错误部分,如果你需要更多让我知道)

    2014-11-08 23:30:32,709 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: registered UNIX signal handlers for [TERM, HUP, INT]
2014-11-08 23:30:33,132 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Invalid dfs.datanode.data.dir /usr/local/hadoop_store/hdfs/datanode :
EPERM: Operation not permitted
        at org.apache.hadoop.io.nativeio.NativeIO$POSIX.chmodImpl(Native Method)
        at org.apache.hadoop.io.nativeio.NativeIO$POSIX.chmod(NativeIO.java:226)
        at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:642)
        at org.apache.hadoop.fs.FilterFileSystem.setPermission(FilterFileSystem.java:472)
        at org.apache.hadoop.util.DiskChecker.mkdirsWithExistsAndPermissionCheck(DiskChecker.java:126)
        at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:142)
        at org.apache.hadoop.hdfs.server.datanode.DataNode$DataNodeDiskChecker.checkDir(DataNode.java:1866)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.checkStorageLocations(DataNode.java:1908)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1890)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1782)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1829)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2005)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2029)
2014-11-08 23:30:33,134 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMain
java.io.IOException: All directories in dfs.datanode.data.dir are invalid: "/usr/local/hadoop_store/hdfs/datanode/"
        at org.apache.hadoop.hdfs.server.datanode.DataNode.checkStorageLocations(DataNode.java:1917)

现在我的疑问是如何让它有效.

感谢帮助.
PS我试过很多论坛,所以没有人能给我解决这个问题.因此问题.

Answer 1

首先从hdfs文件夹中删除所有内容:

的价值 <name>hadoop.tmp.dir</name>

rm -rf /usr/local/hadoop_store

确保dir拥有权限所有者和权限/ usr/local/hadoop_store

hduser@localhost$sudo chown hduser:hadoop -R /usr/local/hadoop_store
hduser@localhost$sudo chmod 777 -R /usr/local/hadoop_store

格式化namenode:

hduser@localhost$hadoop namenode -format

再次启动所有进程