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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/12/02 04:02:11 UTC
[jira] [Assigned] (SPARK-12087) DStream.saveAsHadoopFiles can throw
ConcurrentModificationException
[ https://issues.apache.org/jira/browse/SPARK-12087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-12087:
------------------------------------
Assignee: Tathagata Das (was: Apache Spark)
> DStream.saveAsHadoopFiles can throw ConcurrentModificationException
> -------------------------------------------------------------------
>
> Key: SPARK-12087
> URL: https://issues.apache.org/jira/browse/SPARK-12087
> Project: Spark
> Issue Type: Bug
> Components: Streaming
> Affects Versions: 1.3.1, 1.4.1, 1.5.2
> Reporter: Tathagata Das
> Assignee: Tathagata Das
>
> The JobConf object created in DStream.saveAsHadoopFiles is used concurrently in multiple places:
> - The JobConf is updated by RDD.saveAsHadoopFile() before the job is launched
> - The JobConf is serialized as part of the DStream checkpoints.
> These concurrent accesses (updating in one thread, while the another thread is serializing it) can lead to concurrentModidicationException in the underlying Java hashmap using in the internal Hadoop Configuration object.
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