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https://issues.apache.org/jira/browse/SPARK-3979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14174165#comment-14174165
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Marcelo Vanzin commented on SPARK-3979:
---------------------------------------
BTW, this would avoid issues like this:
{noformat}
Exception in thread "main"
org.apache.hadoop.ipc.RemoteException(java.io.IOException): file
/user/systest/.sparkStaging/application_1413485082283_0001/spark-assembly-1.2.0-SNAPSHOT-hadoop2.3.0.jar.
Requested replication 3 exceeds maximum 1
at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.verifyReplication(BlockManager.java:943)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setReplicationInt(FSNamesystem.java:2243)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setReplication(FSNamesystem.java:2233)
...
at
org.apache.spark.deploy.yarn.ClientBase$class.copyFileToRemote(ClientBase.scala:101)
{noformat}
> Yarn backend's default file replication should match HDFS's default one
> -----------------------------------------------------------------------
>
> Key: SPARK-3979
> URL: https://issues.apache.org/jira/browse/SPARK-3979
> Project: Spark
> Issue Type: Bug
> Components: YARN
> Reporter: Marcelo Vanzin
> Priority: Minor
>
> This code in ClientBase.scala sets the replication used for files uploaded to
> HDFS:
> {{noformat}}
> val replication = sparkConf.getInt("spark.yarn.submit.file.replication",
> 3).toShort
> {{noformat}}
> Instead of a hardcoded "3" (which is the default value for HDFS), it should
> be using the default value from the HDFS conf ("dfs.replication").
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