我是hadoop框架的新手，目前我正在使用大数据项目，在Windows 7中使用cygwin，hadoop-0.19.1，eclipse-3.3.1（Europa）。现在我试图从hadoop -0.19改变.1到hadoop-1.2.1 version.i配置hadoop-1.2.1如下
核心-site.xml中：
<?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中
<?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datanode时遇到错误，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网站尝试了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：“无法设置路径权限：\ tmp \ hadoop-user \ dfs \ data to 0755”。
我已多次搜索，但没有得到任何解决方案。
任何人都会帮忙。
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
************************************************************/
答案 0 :(得分：1)
这是一个Cygwin问题。您需要将所有本地目录更改为Cygwin目录，例如c:/cygwin/usr/tmp/hadoop-user/dfs/data
确保使用临时，日志和数据目录（hdfs-site.xml）
执行此操作