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PODatanode process not running in Hadoop
 

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    <p>I set up and configured a multi-node Hadoop cluster using <a href="http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-multi-node-cluster/#formatting-the-hdfs-filesystem-via-the-namenode">this tutorial</a>.</p> <p>When I type in the start-all.sh command, it shows all the processes initializing properly as follows:</p> <pre><code>starting namenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-namenode-jawwadtest1.out jawwadtest1: starting datanode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-datanode-jawwadtest1.out jawwadtest2: starting datanode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-datanode-jawwadtest2.out jawwadtest1: starting secondarynamenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-secondarynamenode-jawwadtest1.out starting jobtracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-jobtracker-jawwadtest1.out jawwadtest1: starting tasktracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-tasktracker-jawwadtest1.out jawwadtest2: starting tasktracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-tasktracker-jawwadtest2.out </code></pre> <p>However, when I type the jps command, I get the following output:</p> <pre><code>31057 NameNode 4001 RunJar 6182 RunJar 31328 SecondaryNameNode 31411 JobTracker 32119 Jps 31560 TaskTracker </code></pre> <p>As you can see, there's no datanode process running. I tried configuring a single-node cluster but got the same problem. Would anyone have any idea what could be going wrong here? Are there any configuration files that are not mentioned in the tutorial or I may have looked over? I am new to Hadoop and am kinda lost and any help would be greatly appreciated.</p> <p>EDIT: hadoop-root-datanode-jawwadtest1.log:</p> <pre><code>STARTUP_MSG: args = [] STARTUP_MSG: version = 1.0.3 STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/$ ************************************************************/ 2012-08-09 23:07:30,717 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loa$ 2012-08-09 23:07:30,734 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapt$ 2012-08-09 23:07:30,735 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl:$ 2012-08-09 23:07:30,736 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl:$ 2012-08-09 23:07:31,018 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapt$ 2012-08-09 23:07:31,024 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl:$ 2012-08-09 23:07:32,366 INFO org.apache.hadoop.ipc.Client: Retrying connect to $ 2012-08-09 23:07:37,949 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: $ at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(Data$ at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransition$ at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNo$ at org.apache.hadoop.hdfs.server.datanode.DataNode.&lt;init&gt;(DataNode.java$ at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNod$ at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode($ at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataN$ at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.$ at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1$ 2012-08-09 23:07:37,951 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: S$ /************************************************************ SHUTDOWN_MSG: Shutting down DataNode at jawwadtest1/198.101.220.90 ************************************************************/ </code></pre>
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    1. This table or related slice is empty.
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    1. USTshepang
    1. USJawwad Zakaria
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      1. USbarclay
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    1. COOn Which node is this jps run ?
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      1. USRazvan
    2. COCan you look in the `/usr/local/hadoop/libexec/../logs/hadoop-root-datanode-jawwadtest1.log` file on the `jawwadtest1` node and see if there are any error messages you can post back?
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      1. USChris White
    3. CORazvan, this is all on the master node.
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      1. USJawwad Zakaria
 

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