java - dfs.data.dir : Failed to set permissions of path:\tmp\hadoop-user\dfs\data to 0755 中的无效目录

Question

我是 hadoop 框架的新手，目前我正在处理大数据项目，在 Windows 7 中使用 cygwin、hadoop-0.19.1、eclipse-3.3.1 (Europa)。现在我正在尝试从 hadoop -0.19 进行更改.1 到 hadoop-1.2.1 version.i 如下配置 hadoop-1.2.1

核心站点.xml:

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>

 <property>
         <name>fs.default.name</name>
         <value>hdfs://localhost:9100</value>
  </property>

</configuration>

hdfs.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>

  <property>
         <name>dfs.replication</name>
         <value>1</value>
     </property>


</configuration>

mapred-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>

     <property>
         <name>mapred.job.tracker</name>
         <value>localhost:9101</value>
     </property>



</configuration>

但是我在启动数据节点时出错，如下所示

$ bin/hadoop datanode
14/02/07 22:24:09 INFO datanode.DataNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting DataNode
STARTUP_MSG:   host = raj-PC/101.63.181.80
STARTUP_MSG:   args = []
STARTUP_MSG:   version = 1.2.1
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/b                                                                                                                ranch-1.2 -r 1503152; compiled by 'mattf' on Mon Jul 22 15:23:09 PDT 2013
STARTUP_MSG:   java = 1.7.0_45
************************************************************/
14/02/07 22:24:10 INFO impl.MetricsConfig: loaded properties from hadoop-metrics                                                                                                                2.properties
14/02/07 22:24:10 INFO impl.MetricsSourceAdapter: MBean for source MetricsSystem                                                                                                                ,sub=Stats registered.
14/02/07 22:24:10 INFO impl.MetricsSystemImpl: Scheduled snapshot period at 10 s                                                                                                                econd(s).
14/02/07 22:24:10 INFO impl.MetricsSystemImpl: DataNode metrics system started
14/02/07 22:24:11 INFO impl.MetricsSourceAdapter: MBean for source ugi registere                                                                                                                d.
14/02/07 22:24:11 WARN impl.MetricsSystemImpl: Source name ugi already exists!
14/02/07 22:24:11 WARN util.NativeCodeLoader: Unable to load native-hadoop libra                                                                                                                ry for your platform... using builtin-java classes where applicable
14/02/07 22:24:11 WARN datanode.DataNode: Invalid directory in dfs.data.dir: Fai                                                                                                                led to set permissions of path: \tmp\hadoop-raj\dfs\data to 0755
14/02/07 22:24:11 ERROR datanode.DataNode: All directories in dfs.data.dir are i                                                                                                                nvalid.
14/02/07 22:24:11 INFO datanode.DataNode: Exiting Datanode
14/02/07 22:24:11 INFO datanode.DataNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at raj-PC/101.63.181.80
************************************************************/

.我从这个 github 站点尝试了 Windows 补丁:https://github.com/congainc/patch-hadoop_7682-1.0.x-win .

它解决了我的问题。但是如果我试图在 eclipse 中运行简单的字数统计程序，它会给我同样的错误:“无法将路径的权限设置为:\tmp\hadoop-user\dfs\data 到 0755”。

我用谷歌搜索了很多次，但没有得到任何解决方案。

请任何人帮忙。

按照说明更改 hdfs-site.xml 后。

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>

  <property>
         <name>dfs.replication</name>
         <value>1</value>
     </property>

  <property>
    <name>dfs.name.dir</name>
    <value>C:/cygwin/usr/tmp/hadoop-raj/dfs/logs</value>
 </property>

  <property>
    <name>dfs.data.dir</name>
    <value>c:/cygwin/usr/hadoop-raj/dfs/data</value>
 </property>


  <property>
<name>hadoop.tmp.dir</name>
<value>c:/cygwin/usr/hadoop-raj/dfs/tmp</value>
</property>


</configuration>

现在我在 tasktracker 上遇到以下错误

 $ bin/hadoop tasktracker
14/02/08 15:25:22 INFO mapred.TaskTracker: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting TaskTracker
STARTUP_MSG:   host = raj-PC/192.168.42.248
STARTUP_MSG:   args = []
STARTUP_MSG:   version = 1.2.1
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/b                                                                                                                ranch-1.2 -r 1503152; compiled by 'mattf' on Mon Jul 22 15:23:09 PDT 2013
STARTUP_MSG:   java = 1.7.0_45
************************************************************/
14/02/08 15:25:23 INFO impl.MetricsConfig: loaded properties from hadoop-metrics                                                                                                                2.properties
14/02/08 15:25:23 INFO impl.MetricsSourceAdapter: MBean for source MetricsSystem                                                                                                                ,sub=Stats registered.
14/02/08 15:25:23 INFO impl.MetricsSystemImpl: Scheduled snapshot period at 10 s                                                                                                                econd(s).
14/02/08 15:25:23 INFO impl.MetricsSystemImpl: TaskTracker metrics system starte                                                                                                                d
14/02/08 15:25:23 WARN util.NativeCodeLoader: Unable to load native-hadoop libra                                                                                                                ry for your platform... using builtin-java classes where applicable
14/02/08 15:25:23 INFO impl.MetricsSourceAdapter: MBean for source ugi registere                                                                                                                d.
14/02/08 15:25:23 WARN impl.MetricsSystemImpl: Source name ugi already exists!
14/02/08 15:25:23 INFO mortbay.log: Logging to org.slf4j.impl.Log4jLoggerAdapter                                                                                                                (org.mortbay.log) via org.mortbay.log.Slf4jLog
14/02/08 15:25:23 INFO http.HttpServer: Added global filtersafety (class=org.apa                                                                                                                che.hadoop.http.HttpServer$QuotingInputFilter)
14/02/08 15:25:23 INFO mapred.TaskLogsTruncater: Initializing logs' truncater wi                                                                                                                th mapRetainSize=-1 and reduceRetainSize=-1
14/02/08 15:25:23 INFO mapred.TaskTracker: Starting tasktracker with owner as ra                                                                                                                j
14/02/08 15:25:23 INFO mapred.TaskTracker: Good mapred local directories are: /t                                                                                                                mp/hadoop-raj/mapred/local
14/02/08 15:25:23 ERROR mapred.TaskTracker: Can not start task tracker because j                                                                                                                ava.io.IOException: Failed to set permissions of path: \tmp\hadoop-raj\mapred\lo                                                                                                                cal\taskTracker to 0755
        at org.apache.hadoop.fs.FileUtil.checkReturnValue(FileUtil.java:691)
        at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:672)
        at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSys                                                                                                                tem.java:514)
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.jav                                                                                                                a:349)
        at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:19                                                                                                                3)
        at org.apache.hadoop.mapred.TaskTracker.initialize(TaskTracker.java:823)
        at org.apache.hadoop.mapred.TaskTracker.<init>(TaskTracker.java:1573)
        at org.apache.hadoop.mapred.TaskTracker.main(TaskTracker.java:3937)

14/02/08 15:25:23 INFO mapred.TaskTracker: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down TaskTracker at raj-PC/192.168.42.248
************************************************************/

Answer 1

这是一个 Cygwin 问题。需要将本地目录全部改为Cygwin目录，如c:/cygwin/usr/tmp/hadoop-user/dfs/data

确保对临时、日志和数据目录 (hdfs-site.xml) 执行此操作