[jira] [Assigned] (SPARK-13071) Coalescing HadoopRDD overwrites existing input metrics

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-13071?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-13071:
------------------------------------

    Assignee: Apache Spark  (was: Andrew Or)

> Coalescing HadoopRDD overwrites existing input metrics
> ------------------------------------------------------
>
>                 Key: SPARK-13071
>                 URL: https://issues.apache.org/jira/browse/SPARK-13071
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.0.0
>            Reporter: Andrew Or
>            Assignee: Apache Spark
>
> Currently if we do the following in Hadoop 2.5+:
> {code}
> sc.textFile(..., 4).coalesce(2).collect()
> {code}
> We'll get incorrect `InputMetrics#bytesRead`. This is because HadoopRDD's compute method overwrites any existing value of `bytesRead`, and in the case of coalesce we'll end up calling `compute` multiple times in the same task.
> This is why InputOutputMetricsSuite is failing in master, but only for hadoop2.6/2.7: https://amplab.cs.berkeley.edu/jenkins/job/spark-master-test-sbt-hadoop-2.7/67/
> This was caused by https://github.com/apache/spark/pull/10835.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org