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https://issues.apache.org/jira/browse/FLINK-944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14035987#comment-14035987
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ASF GitHub Bot commented on FLINK-944:
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Github user StephanEwen commented on the pull request:
https://github.com/apache/incubator-flink/pull/25#issuecomment-46466239
Looks good, will merge...
> Serialization problem of CollectionInputFormat
> ----------------------------------------------
>
> Key: FLINK-944
> URL: https://issues.apache.org/jira/browse/FLINK-944
> Project: Flink
> Issue Type: Bug
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
>
> The CollectionInputFormat uses only the standard serialization means provided
> by the JVM. Thus data types which are serializable with a TypeSerializer but
> does not implement the Serializable interface cannot be used with a
> CollectionDataSource. Even worse, if one uses an aggregation type such as a
> tuple, only the top level object will be checked for serializability.
> Consequently, it will crash at runtime.
> It would be more user friendly to not enforce that a used data type has to
> implement the Serializable interface. Instead we should use the generated
> TypeSerializer to do the serialization. That way, we are more flexible.
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