根据硬件配置后mapred-site.xml和yarn-site.xml

机器总共16G内存，sqoop导入数据时大约需要2G左右

mapred-site.xml

<configuration>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>

    <property>
        <name>mapreduce.jobhistory.address</name>
        <value>master:10020</value>
        <description>MapReduce JobHistory Server IPC host:port</description>
    </property>

    <property>
        <name>mapreduce.jobhistory.webapp.address</name>
        <value>master:19888</value>
        <description>MapReduce JobHistory Server Web UI host:port</description>

    </property>
    <property>
        <name>mapred.child.java.opts</name>
        <value>-Xmx3000m -Xmx3000m -XX:-UseGCOverheadLimit</value>
    </property>

    <property>
        <name>mapreduce.reduce.memory.mb</name>
        <value>4096</value>
    </property>

    <property>
        <name>mapreduce.map.memory.mb</name>
        <value>4096</value>

    </property>
    <property>
        <name>mapreduce.task.timeout</name>
        <value>600000</value>
    </property>

</configuration>

yarn-site.xml

<configuration>
    <property>
        <name>yarn.resourcemanager.hostname</name>
        <value>master</value>
    </property>


    <property>
        <description>The address of the applications manager interface in the RM.</description>
        <name>yarn.resourcemanager.address</name>
        <value>${yarn.resourcemanager.hostname}:8032</value>
    </property>


    <property>
        <description>The address of the scheduler interface.</description>
        <name>yarn.resourcemanager.scheduler.address</name>
        <value>${yarn.resourcemanager.hostname}:8030</value>
    </property>


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


    <property>
        <description>The https adddress of the RM web application.</description>
        <name>yarn.resourcemanager.webapp.https.address</name>
        <value>${yarn.resourcemanager.hostname}:8090</value>
    </property>


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


    <property>
        <description>The address of the RM admin interface.</description>
        <name>yarn.resourcemanager.admin.address</name>
        <value>${yarn.resourcemanager.hostname}:8033</value>
    </property>


    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>

    <property>
        <name>yarn.scheduler.maximum-allocation-mb</name>
        <value>9216</value>
        <discription>每个任务最多可用内存,单位MB,默认8182MB</discription>
    </property>

    <property>
        <name>yarn.nodemanager.vmem-pmem-ratio</name>
        <value>2.1</value>
    </property>

    <property>
        <name>yarn.nodemanager.resource.memory-mb</name>
        <value>10240</value>
        <discription>该节点总共可用内存</discription>
    </property>
  <property>
    <name>yarn.app.mapreduce.am.resource.mb</name>
    <value>3000</value>
    <discription>am管理任务需要的内存</discription>
  </property>
</configuration>