[
https://issues.apache.org/jira/browse/SPARK-41848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dongjoon Hyun reassigned SPARK-41848:
-------------------------------------
Assignee: huangtengfei
> Tasks are over-scheduled with TaskResourceProfile
> -------------------------------------------------
>
> Key: SPARK-41848
> URL: https://issues.apache.org/jira/browse/SPARK-41848
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.4.0
> Reporter: wuyi
> Assignee: huangtengfei
> Priority: Blocker
>
> {code:java}
> test("SPARK-XXX") {
> val conf = new
> SparkConf().setAppName("test").setMaster("local-cluster[1,4,1024]")
> sc = new SparkContext(conf)
> val req = new TaskResourceRequests().cpus(3)
> val rp = new ResourceProfileBuilder().require(req).build()
> val res = sc.parallelize(Seq(0, 1), 2).withResources(rp).map { x =>
> Thread.sleep(5000)
> x * 2
> }.collect()
> assert(res === Array(0, 2))
> } {code}
> In this test, tasks are supposed to be scheduled in order since each task
> requires 3 cores but the executor only has 4 cores. However, we noticed 2
> tasks are launched concurrently from the logs.
> It turns out that we used the TaskResourceProfile (taskCpus=3) of the taskset
> for task scheduling:
> {code:java}
> val rpId = taskSet.taskSet.resourceProfileId
> val taskSetProf = sc.resourceProfileManager.resourceProfileFromId(rpId)
> val taskCpus = ResourceProfile.getTaskCpusOrDefaultForProfile(taskSetProf,
> conf) {code}
> but the ResourceProfile (taskCpus=1) of the executor for updating the free
> cores in ExecutorData:
> {code:java}
> val rpId = executorData.resourceProfileId
> val prof = scheduler.sc.resourceProfileManager.resourceProfileFromId(rpId)
> val taskCpus = ResourceProfile.getTaskCpusOrDefaultForProfile(prof, conf)
> executorData.freeCores -= taskCpus {code}
> which results in the inconsistency of the available cores.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
