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https://issues.apache.org/jira/browse/FLINK-7291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17328737#comment-17328737
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Flink Jira Bot commented on FLINK-7291:
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This major issue is unassigned and itself and all of its Sub-Tasks have not
been updated for 30 days. So, it has been labeled "stale-major". If this ticket
is indeed "major", please either assign yourself or give an update. Afterwards,
please remove the label. In 7 days the issue will be deprioritized.
> Incorrect return value of getArity() in ListTypeInfo and MapTypeInfo
> --------------------------------------------------------------------
>
> Key: FLINK-7291
> URL: https://issues.apache.org/jira/browse/FLINK-7291
> Project: Flink
> Issue Type: Bug
> Components: API / Type Serialization System
> Affects Versions: 1.3.1, 1.4.0
> Reporter: Fabian Hueske
> Priority: Major
> Labels: stale-major
>
> The implementation of {{getArity()}} in {{ListTypeInfo}} and {{MapTypeInfo}}
> returns 0 but should return 1.
> The implementation of {{MapTypeInfo.getTotalFields()}} is also incorrect and
> must return 1 instead of 2.
> The JavaDocs of {{TypeInformation.getArity()}} and
> {{TypeInformation.getTotalFields()}} should be extended as well to avoid
> future confusion about this method. The method returns the arity for current
> type. For atomic types, this is 1 for composite types, the number of
> non-nested fields (or number of fields on the first nesting-level).
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