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From Piotr Kubaj <pku...@riseup.net>
Subject MapReduce jobs start only on the PC they are typed on
Date Thu, 09 Oct 2014 21:24:24 GMT
Hi. I'm trying to run Hadoop on a 2-PC cluster (I need to do some
benchmarks for my bachelor thesis) and it works, but jobs start only on
the PC I typed the command (doesn't matter whether it has better specs
or not or where data is physically since I count Pi). My mapred-site.xml is:

<configuration>
<property>
  <name>mapred.job.tracker</name>
  <value>10.0.0.1:54311</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>
<property>
 <name>mapred.framework.name</name>
 <value>yarn</value>
</property>
<property>
  <name>mapred.map.tasks</name>
  <value>20</value>
</property>
<property>
  <name>mapred.reduce.tasks</name>
  <value>20</value>
</property>
<property>
  <name>mapreduce.tasktracker.map.tasks.maximum</name>
  <value>20</value>
</property>
<property>
  <name>mapreduce.tasktracker.reduce.tasks.maximum</name>
  <value>20</value>
</property>
<property>
  <name>mapreduce.tasktracker.map.tasks.maximum</name>
  <value>30</value>
  <final>true</final>
</property>
<property>
  <name>mapreduce.tasktracker.reduce.tasks.maximum</name>
  <value>30</value>
</property>
<property>
  <name>mapreduce.job.maps</name>
  <value>3500</value>
</property>
<property>
  <name>mapreduce.job.reduces</name>
  <value>3500</value>
</property>
<property>
  <name>mapred.child.java.opts</name>
  <value>-Xmx2048m</value>
</property>
<property>
  <name>mapreduce.reduce.shuffle.parallelcopies</name>
  <value>10</value>
</property>
<property>
  <name>mapreduce.jobhistory.address</name>
  <value>DESKTOP1:10020</value>
</property>
<property>
  <name>mapreduce.jobhistory.webapp.address</name>
  <value>DESKTOP1:19888</value>
</property>
</configuration>

And yarn-site.xml:
<configuration>

<property>
 <name>yarn.nodemanager.local-dirs</name>
 <value>/var/cache/hadoop-hdfs/hdfs</value>
 <description>Comma separated list of paths. Use the list of directories
from $YARN_LOCAL_DIR.
                For example,
/grid/hadoop/hdfs/yarn,/grid1/hadoop/hdfs/yarn.</description>
</property>

<property>
 <name>yarn.nodemanager.log-dirs</name>
 <value>/var/log/hadoop/yarn</value>
 <description>Use the list of directories from $YARN_LOG_DIR.
                For example, /var/log/hadoop/yarn.</description>
</property>

<property>
    <name>yarn.resourcemanager.hostname</name>
    <value>10.0.0.1</value>
  </property>

  <property>
    <name>yarn.resourcemanager.address</name>
    <value>${yarn.resourcemanager.hostname}:8032</value>
  </property>

  <property>
    <name>yarn.resourcemanager.scheduler.address</name>
    <value>${yarn.resourcemanager.hostname}:8030</value>
  </property>

  <property>
    <name>yarn.resourcemanager.resource-tracker.address</name>
    <value>${yarn.resourcemanager.hostname}:8031</value>
  </property>

  <property>
    <name>yarn.resourcemanager.admin.address</name>
    <value>${yarn.resourcemanager.hostname}:8033</value>
  </property>

  <property>
    <description>The address of the RM web application.</description>
    <name>yarn.resourcemanager.webapp.address</name>
    <value>${yarn.resourcemanager.hostname}:8088</value>
  </property>

  <property>
    <name>yarn.scheduler.maximum-allocation-mb</name>
    <value>131072</value>
  </property>

  <property>
    <name>yarn.nodemanager.resource.memory-mb</name>
    <value>131072</value>
  </property>

  <property>
    <description>Number of CPU cores that can be allocated
    for containers.</description>
    <name>yarn.nodemanager.resource.cpu-vcores</name>
    <value>8</value>
  </property>

  <property>
    <name>yarn.resourcemanager.am.max-attempts</name>
    <value>3</value>
  </property>
  <property>
    <name>yarn.log-aggregation-enable</name>
    <value>true</value>
  </property>
  <property>
    <name>yarn.log-aggregation.retain-seconds</name>
    <value>604800</value>
  </property>

</configuration>




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