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https://issues.apache.org/jira/browse/FLINK-3788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15247919#comment-15247919
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Andreas C. Osowski commented on FLINK-3788:
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In that case, the behaviour can probably be explained by:
bq. It should be noted that this trait is implemented using the DelayedInit
functionality, which means that fields of the object will not have been
initialized before the main method has been executed.
Source: http://www.scala-lang.org/api/current/index.html#scala.App
> Local variable values are not distributed to job runners
> --------------------------------------------------------
>
> Key: FLINK-3788
> URL: https://issues.apache.org/jira/browse/FLINK-3788
> Project: Flink
> Issue Type: Bug
> Components: DataSet API
> Affects Versions: 1.0.0, 1.0.1
> Environment: Scala 2.11.8
> Sun JDK 1.8.0_65 or OpenJDK 1.8.0_77
> Fedora 25, 4.6.0-0.rc2.git3.1.fc25.x86_64
> Reporter: Andreas C. Osowski
> Attachments: FLINK-3788.tgz
>
>
> Variable values of non-elementary types aren't caught and distributed to job
> runners, causing them to remain 'null' and causing NPEs upon access when
> running on a cluster. Running locally through `flink-clients` works fine.
> Changing parallelism or disabling the closure cleaner don't seem to have any
> effect.
> Minimal example, also see the attached archive.
> {code:java}
> case class IntWrapper(a1: Int)
> val wrapped = IntWrapper(42)
> env.readTextFile("myTextFile.txt").map(line => wrapped.toString).collect
> {code}
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