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Posted to issues@spark.apache.org by "Saisai Shao (JIRA)" <ji...@apache.org> on 2015/01/04 02:27:34 UTC
[jira] [Commented] (SPARK-5001) BlockRDD removed unreasonablly in
streaming
[ https://issues.apache.org/jira/browse/SPARK-5001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14263694#comment-14263694 ]
Saisai Shao commented on SPARK-5001:
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Hi [~hanhg], I don't think it is a problem of Spark Streaming, from my understanding, mostly this exception is introduced by your unstable running status, say the processing delay is larger than the tolerated batch interval. IMO I think you should tune your application, rather than modifying the Spark Streaming in this way. The patch you submitted is not a proper way to solve the problem from my understanding, it will break the internal logic of Spark Streaming.
> BlockRDD removed unreasonablly in streaming
> -------------------------------------------
>
> Key: SPARK-5001
> URL: https://issues.apache.org/jira/browse/SPARK-5001
> Project: Spark
> Issue Type: Bug
> Affects Versions: 1.0.2, 1.1.1, 1.2.0
> Reporter: hanhonggen
> Attachments: fix_bug_BlockRDD_removed_not_reasonablly_in_streaming.patch
>
>
> I've counted messages using kafkainputstream of spark-1.1.1. The test app failed when the latter batch job completed sooner than the previous. In the source code, BlockRDDs older than (time-rememberDuration) will be removed in cleanMetaData after one job completed. And the previous job will abort due to block not found.The relevant log are as follows:
> 2014-12-25 14:07:12(Logging.scala:59)[sparkDriver-akka.actor.default-dispatcher-14] INFO :Starting job streaming job 1419487632000 ms.0 from job set of time 1419487632000 ms
> 2014-12-25 14:07:15(Logging.scala:59)[sparkDriver-akka.actor.default-dispatcher-14] INFO :Starting job streaming job 1419487635000 ms.0 from job set of time 1419487635000 ms
> 2014-12-25 14:07:15(Logging.scala:59)[sparkDriver-akka.actor.default-dispatcher-15] INFO :Finished job streaming job 1419487635000 ms.0 from job set of time 1419487635000 ms
> 2014-12-25 14:07:15(Logging.scala:59)[sparkDriver-akka.actor.default-dispatcher-16] INFO :Removing blocks of RDD BlockRDD[3028] at createStream at TestKafka.java:144 of time 1419487635000 ms from DStream clearMetadata
> java.lang.Exception: Could not compute split, block input-0-1419487631400 not found for 3028
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