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From "Andrew Or (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-2350) Master throws NPE
Date Mon, 21 Jul 2014 21:20:40 GMT

     [ https://issues.apache.org/jira/browse/SPARK-2350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Or updated SPARK-2350:
-----------------------------

    Affects Version/s:     (was: 1.1.0)
                       1.0.0

> Master throws NPE
> -----------------
>
>                 Key: SPARK-2350
>                 URL: https://issues.apache.org/jira/browse/SPARK-2350
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 1.0.0
>            Reporter: Andrew Or
>            Assignee: Aaron Davidson
>             Fix For: 0.9.2, 1.0.1, 1.1.0
>
>
> ... if we launch a driver and there are more waiting drivers to be launched. This is
because we remove from a list while iterating through this.
> Here is the culprit from Master.scala (L487 as of the creation of this JIRA, commit bc7041a42dfa84312492ea8cae6fdeaeac4f6d1c).
> {code}
> for (driver <- waitingDrivers) {
>   if (worker.memoryFree >= driver.desc.mem && worker.coresFree >= driver.desc.cores)
{
>     launchDriver(worker, driver)
>     waitingDrivers -= driver
>   }
> }
> {code}



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