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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/10/16 08:31:20 UTC
[jira] [Commented] (SPARK-17931) taskScheduler has some unneeded
serialization
[ https://issues.apache.org/jira/browse/SPARK-17931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15579590#comment-15579590 ]
Apache Spark commented on SPARK-17931:
--------------------------------------
User 'witgo' has created a pull request for this issue:
https://github.com/apache/spark/pull/15505
> taskScheduler has some unneeded serialization
> ---------------------------------------------
>
> Key: SPARK-17931
> URL: https://issues.apache.org/jira/browse/SPARK-17931
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Guoqiang Li
>
> When taskScheduler instantiates TaskDescription, it calls `Task.serializeWithDependencies(task, sched.sc.addedFiles, sched.sc.addedJars, ser)`. It serializes task and its dependency.
> But after SPARK-2521 has been merged into the master, the ResultTask class and ShuffleMapTask class no longer contain rdd and closure objects. TaskDescription class can be changed as below:
> {noformat}
> class TaskDescription[T](
> val taskId: Long,
> val attemptNumber: Int,
> val executorId: String,
> val name: String,
> val index: Int,
> val task: Task[T]) extends Serializable
> {noformat}
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