我正在使用 Ubuntu 10.04。我在本地目录中安装了 hadoop 作为独立目录。
~-desktop:~$ hadoop/bin/hadoop version
Hadoop 1.2.0
Subversion https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.2 -r 1479473
Compiled by hortonfo on Mon May 6 06:59:37 UTC 2013
From source with checksum 2e0dac51ede113c1f2ca8e7d82fb3405
This command was run using /home/circar/hadoop/hadoop-core-1.2.0.jar
conf/core-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>hadoop.tmp.dir</name>
<value>/home/circar/hadoop/dataFiles</value>
<description>A base for other temporary directories.</description>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://localhost:54310</value>
<description>The name of the default file system. A URI whose
scheme and authority determine the FileSystem implementation. The
uri's scheme determines the config property (fs.SCHEME.impl) naming
the FileSystem implementation class. The uri's authority is used to
determine the host, port, etc. for a filesystem.</description>
</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:54311</value>
<description>The host and port that the MapReduce job tracker runs
at. If "local", then jobs are run in-process as a single map
and reduce task.
</description>
</property>
</configuration>
hdfs-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>dfs.replication</name>
<value>1</value>
<description>Default block replication.
The actual number of replications can be specified when the file is created.
The default is used if replication is not specified in create time.
</description>
</property>
</configuration>
我已经格式化了两次namenode
~-desktop:~$ hadoop/bin/hadoop namenode -format
然后我开始使用hadoop
~-desktop:~$ hadoop/bin/start-all.sh
显示结果为：
starting namenode, logging to /home/circar/hadoop/libexec/../logs/hadoop-circar-namenode-circar-desktop.out
circar@localhost's password:
localhost: starting datanode, logging to /home/circar/hadoop/libexec/../logs/hadoop-circar-datanode-circar-desktop.out
circar@localhost's password:
localhost: starting secondarynamenode, logging to /home/circar/hadoop/libexec/../logs/hadoop-circar-secondarynamenode-circar-desktop.out
starting jobtracker, logging to /home/circar/hadoop/libexec/../logs/hadoop-circar-jobtracker-circar-desktop.out
circar@localhost's password:
localhost: starting tasktracker, logging to /home/circar/hadoop/libexec/../logs/hadoop-circar-tasktracker-circar-desktop.out
但是在 /logs/hadoop-circar-datanode-circar-desktop.log
它显示错误为：
2013-06-24 17:32:47,183 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting DataNode
STARTUP_MSG: host = circar-desktop/127.0.1.1
STARTUP_MSG: args = []
STARTUP_MSG: version = 1.2.0
STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.2 -r 1479473; compiled by 'hortonfo' on Mon May 6 06:59:37 UTC 2013
STARTUP_MSG: java = 1.6.0_26
************************************************************/
2013-06-24 17:32:47,315 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties
2013-06-24 17:32:47,324 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered.
2013-06-24 17:32:47,325 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).
2013-06-24 17:32:47,325 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system started
2013-06-24 17:32:47,447 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered.
2013-06-24 17:32:47,450 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists!
2013-06-24 17:32:49,265 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Incompatible namespaceIDs in /home/circar/hadoop/dataFiles/dfs/data: namenode namespaceID = 186782509; datanode namespaceID = 1733977738
at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:232)
at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:147)
at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:412)
at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:319)
at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1698)
at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1637)
at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1655)
at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1781)
at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1798)
2013-06-24 17:32:49,266 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at circar-desktop/127.0.1.1
************************************************************/
JPS 显示：
~-desktop:~$ jps
8084 Jps
7458 JobTracker
7369 SecondaryNameNode
7642 TaskTracker
6971 NameNode
当我试图停止它时，它显示：
~-desktop:~$ hadoop/bin/stop-all.sh
stopping jobtracker
circar@localhost's password:
localhost: stopping tasktracker
stopping namenode
circar@localhost's password:
localhost: *no datanode to stop*
circar@localhost's password:
localhost: stopping secondarynamenode
我在做什么错？有人帮我吗？