当我通过 using 启动 hadoopnode1 时start-all.sh
,它成功地启动了 master 和 slave 上的服务(请参见 slave 的 jps 命令输出)。但是当我尝试在管理屏幕中查看活动节点时,从节点没有出现。即使我hadoop fs -ls /
从 master 运行命令它运行完美,但从 salve 它显示错误消息
@hadoopnode2:~/hadoop-0.20.2/conf$ hadoop fs -ls /
12/05/28 01:14:20 INFO ipc.Client: Retrying connect to server: hadoopnode1/192.168.1.120:8020. Already tried 0 time(s).
12/05/28 01:14:21 INFO ipc.Client: Retrying connect to server: hadoopnode1/192.168.1.120:8020. Already tried 1 time(s).
12/05/28 01:14:22 INFO ipc.Client: Retrying connect to server: hadoopnode1/192.168.1.120:8020. Already tried 2 time(s).
12/05/28 01:14:23 INFO ipc.Client: Retrying connect to server: hadoopnode1/192.168.1.120:8020. Already tried 3 time(s).
.
.
.
12/05/28 01:14:29 INFO ipc.Client: Retrying connect to server: hadoopnode1/192.168.1.120:8020. Already tried 10 time(s).
看起来从属节点(hadoopnode2)无法找到/连接主节点(hadoopnode1)
请指出我缺少什么?
这是主节点和从节点的设置 - PS - 运行相同版本的 Linux 和 Hadoop 和 SSH 的主节点和从节点运行良好,因为我可以从主节点启动从节点
主机(hadoopnode1)和从机(hadoopnode2)上的 core-site.xml、hdfs-site.xml 和 mapred-site.xml 的设置也相同
操作系统 - Ubuntu 10 Hadoop 版本 -
oop@hadoopnode1:~/hadoop-0.20.2/conf$ hadoop version
Hadoop 0.20.2
Subversion https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707
Compiled by chrisdo on Fri Feb 19 08:07:34 UTC 2010
-- 主(hadoopnode1)
hadoop@hadoopnode1:~/hadoop-0.20.2/conf$ uname -a
Linux hadoopnode1 2.6.35-32-generic #67-Ubuntu SMP Mon Mar 5 19:35:26 UTC 2012 i686 GNU/Linux
hadoop@hadoopnode1:~/hadoop-0.20.2/conf$ jps
9923 Jps
7555 NameNode
8133 TaskTracker
7897 SecondaryNameNode
7728 DataNode
7971 JobTracker
masters -> hadoopnode1
slaves -> hadoopnode1
hadoopnode2
--奴隶(hadoopnode2)
hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ uname -a
Linux hadoopnode2 2.6.35-32-generic #67-Ubuntu SMP Mon Mar 5 19:35:26 UTC 2012 i686 GNU/Linux
hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ jps
1959 DataNode
2631 Jps
2108 TaskTracker
masters - hadoopnode1
core-site.xml
hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ cat 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>/var/tmp/hadoop/hadoop-${user.name}</value>
<description>A base for other temp directories</description>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://hadoopnode1:8020</value>
<description>The name of the default file system</description>
</property>
</configuration>
hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ cat 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>hadoopnode1:8021</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</description>
</property>
</configuration>
hadoop@hadoopnode2:~/hadoop-0.20.2/conf$ cat 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>2</value>
<description>Default block replication</description>
</property>
</configuration>