[
https://issues.apache.org/jira/browse/SPARK-16106?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Imran Rashid updated SPARK-16106:
---------------------------------
Priority: Trivial (was: Major)
> TaskSchedulerImpl does not correctly handle new executors on existing hosts
> ---------------------------------------------------------------------------
>
> Key: SPARK-16106
> URL: https://issues.apache.org/jira/browse/SPARK-16106
> Project: Spark
> Issue Type: Bug
> Components: Scheduler
> Affects Versions: 2.0.0
> Reporter: Imran Rashid
> Priority: Trivial
>
> The TaskSchedulerImpl updates the set of executors and hosts in each call to
> {{resourceOffers}}. During this call, it also tracks whether there are any
> new executors observed in {{newExecAvail}}:
> {code}
> executorIdToHost(o.executorId) = o.host
> executorIdToTaskCount.getOrElseUpdate(o.executorId, 0)
> if (!executorsByHost.contains(o.host)) {
> executorsByHost(o.host) = new HashSet[String]()
> executorAdded(o.executorId, o.host)
> newExecAvail = true
> }
> {code}
> However, this only detects when a new *host* is added, not when an additional
> executor is added to an existing host (a relatively common event in dynamic
> allocation).
> The end result is that task locality and {{failedEpochs}} is not updated
> correctly for new executors.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
