spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Guoqiang Li (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (SPARK-2677) BasicBlockFetchIterator#next can wait forever
Date Sun, 27 Jul 2014 18:19:38 GMT

    [ https://issues.apache.org/jira/browse/SPARK-2677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14075673#comment-14075673
] 

Guoqiang Li edited comment on SPARK-2677 at 7/27/14 6:17 PM:
-------------------------------------------------------------

If {{yarn.scheduler.fair.preemption}} is set to {{true}} in yarn, This issue will appear frequently.


was (Author: gq):
If {{yarn.scheduler.fair.preemption}} is set to true in yarn, This issue will appear frequently.

> BasicBlockFetchIterator#next can wait forever
> ---------------------------------------------
>
>                 Key: SPARK-2677
>                 URL: https://issues.apache.org/jira/browse/SPARK-2677
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 0.9.2, 1.0.0, 1.0.1
>            Reporter: Kousuke Saruta
>            Priority: Blocker
>
> In BasicBlockFetchIterator#next, it waits fetch result on result.take.
> {code}
>     override def next(): (BlockId, Option[Iterator[Any]]) = {
>       resultsGotten += 1
>       val startFetchWait = System.currentTimeMillis()
>       val result = results.take()
>       val stopFetchWait = System.currentTimeMillis()
>       _fetchWaitTime += (stopFetchWait - startFetchWait)
>       if (! result.failed) bytesInFlight -= result.size
>       while (!fetchRequests.isEmpty &&
>         (bytesInFlight == 0 || bytesInFlight + fetchRequests.front.size <= maxBytesInFlight))
{
>         sendRequest(fetchRequests.dequeue())
>       }
>       (result.blockId, if (result.failed) None else Some(result.deserialize()))
>     }
> {code}
> But, results is implemented as LinkedBlockingQueue so if remote executor hang up, fetching
Executor waits forever.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message