AWS EMR S3DistCp：auxService:mapreduce_shuffle 不存在

Question

我通过 SSH 连接到 AWS EMR v5.4.0 实例，我想调用 s3distcp。 This link 演示了如何设置一个 emr 步骤来调用它，但是当我运行它时，我收到以下错误：

Container launch failed for container_1492469375740_0001_01_000002 : org.apache.hadoop.yarn.exceptions.InvalidAuxServiceException: The auxService:mapreduce_shuffle does not exist
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.apache.hadoop.yarn.api.records.impl.pb.SerializedExceptionPBImpl.instantiateException(SerializedExceptionPBImpl.java:168)
    at org.apache.hadoop.yarn.api.records.impl.pb.SerializedExceptionPBImpl.deSerialize(SerializedExceptionPBImpl.java:106)
    at org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$Container.launch(ContainerLauncherImpl.java:155)
    at org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$EventProcessor.run(ContainerLauncherImpl.java:390)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

我关注了the instructions here，但还是不行。

Answer 1

原来我需要 restart the yarn nodemanager service 配置后 mapreduce_shuffle:

$ initctl list | grep yarn
hadoop-yarn-resourcemanager start/running, process 1256
hadoop-yarn-proxyserver start/running, process 702
hadoop-yarn-nodemanager start/running, process 896
$ sudo stop hadoop-yarn-nodemanager
$ sudo start hadoop-yarn-nodemanager

此外，如果有帮助，yarn-site.xml 文件位于：/etc/hadoop/conf/yarn-site.xml。它已经有 yarn.nodemanager.aux-services 的条目，但未配置 mapreduce_shuffle：

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

<property>
  <name>yarn.nodemanager.aux-services.spark_shuffle.class</name>
  <value>org.apache.spark.network.yarn.YarnShuffleService</value>
</property>

所以我这样添加：

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

<property>
  <name>yarn.nodemanager.aux-services.mapreduce_shuffle.class</name>
  <value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>

<property>
  <name>yarn.nodemanager.aux-services.spark_shuffle.class</name>
  <value>org.apache.spark.network.yarn.YarnShuffleService</value>
</property>

AWS EMR S3DistCp：auxService:mapreduce_shuffle 不存在

AWS EMR S3DistCp: The auxService:mapreduce_shuffle does not exist

hadoop

elastic-map-reduce