[jira] [Updated] (KAFKA-2335) Javadoc for Consumer says that it's thread-safe

["Ewen Cheslack-Postava (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-2335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ewen Cheslack-Postava updated KAFKA-2335:
-----------------------------------------
         Reviewer: Guozhang Wang
    Fix Version/s: 0.8.3
      Component/s: consumer

> Javadoc for Consumer says that it's thread-safe
> -----------------------------------------------
>
>                 Key: KAFKA-2335
>                 URL: https://issues.apache.org/jira/browse/KAFKA-2335
>             Project: Kafka
>          Issue Type: Bug
>          Components: consumer
>            Reporter: Ismael Juma
>            Assignee: Jason Gustafson
>             Fix For: 0.8.3
>
>
> This looks like it was left there by mistake:
> {quote}
>  * The consumer is thread safe but generally will be used only from within a single thread. The consumer client has no threads of it's own, all work is done in the caller's thread when calls are made on the various methods exposed.
> {quote}
> A few paragraphs below it says:
> {quote}
> The Kafka consumer is NOT thread-safe. All network I/O happens in the thread of the application making the call. It is the responsibility of the user to ensure that multi-threaded access is properly synchronized. Un-synchronized access will result in {@link ConcurrentModificationException}.
> {quote}
> This matches what the code does, so the former quoted section should probably be deleted.



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