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https://issues.apache.org/jira/browse/FLINK-864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Metzger resolved FLINK-864.
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Resolution: Invalid
The mutable object mode is going to be documented in FLINK-1565
> Add description of mutable object iterators (GroupReduce, CoGroup) to
> documentation
> -----------------------------------------------------------------------------------
>
> Key: FLINK-864
> URL: https://issues.apache.org/jira/browse/FLINK-864
> Project: Flink
> Issue Type: Sub-task
> Components: Documentation
> Reporter: GitHub Import
> Labels: github-import
> Fix For: pre-apache
>
>
> Stratosphere uses value iterators with mutable objects.
> If this is not considered by an UDF, this silently leads to invalid results
> and hard to debug bugs.
> We had a lot of discussions about this. In the long run, we want to offer a
> safe default iterator which returns new objects with every call and a more
> efficient iterator with mutable object.
> Until then, we should add a warning to the Java Docs of `GroupReduceFunction`
> and `CoGroupFunction`.
> ---------------- Imported from GitHub ----------------
> Url: https://github.com/stratosphere/stratosphere/issues/864
> Created by: [fhueske|https://github.com/fhueske]
> Labels: documentation, user satisfaction,
> Milestone: Release 0.5.1
> Created at: Mon May 26 10:33:28 CEST 2014
> State: open
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