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From "Matthias J. Sax (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (KAFKA-5985) Mention the need to close store iterators
Date Thu, 28 Sep 2017 17:19:01 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-5985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias J. Sax updated KAFKA-5985:
-----------------------------------
    Component/s: streams

> Mention the need to close store iterators
> -----------------------------------------
>
>                 Key: KAFKA-5985
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5985
>             Project: Kafka
>          Issue Type: Improvement
>          Components: documentation, streams
>    Affects Versions: 0.11.0.0
>            Reporter: Stanislav Chizhov
>
> Store iterators should be closed in all/most of the cases, but currently it is not consistently
reflected in the documentation and javadocs. For instance  https://kafka.apache.org/0110/documentation/streams/developer-guide#streams_developer-guide_interactive-queries_custom-stores
does not mention the need to close an iterator and provide an example that does not do that.

> Some of the fetch methods do mention the need to close an iterator returned (e.g. https://kafka.apache.org/0110/javadoc/org/apache/kafka/streams/state/ReadOnlyKeyValueStore.html#range(K,%20K)),
but others do not: https://kafka.apache.org/0110/javadoc/org/apache/kafka/streams/state/ReadOnlyWindowStore.html#fetch(K,%20long,%20long)
> It makes sense to: 
> - update javadoc for all store methods that do return iterators to reflect that the iterator
returned needs to be closed
> - mention it in the documentation and to update related examples.



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