AWS EMR S3DistCp: The auxService:mapreduce_shuffle does not exist

问题

I am connected to an AWS EMR v5.4.0 instance over SSH and I want to call s3distcp. This link demonstrates how to setup an emr step to call it, but when I run it I get the following error:

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)

I followed the instructions here but it still didn't work.

回答1:

It turns out I needed to restart the yarn nodemanager service after configuring 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

Also, in case it helps the yarn-site.xml file was located at: /etc/hadoop/conf/yarn-site.xml. It already had an entry for yarn.nodemanager.aux-services but mapreduce_shuffle wasn't configured:

<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>

So I added it like this:

<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>

来源：https://stackoverflow.com/questions/43478985/aws-emr-s3distcp-the-auxservicemapreduce-shuffle-does-not-exist

标签

Hadoop

elastic-map-reduce