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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ZOOKEEPER-3215) Handle Java 9/11 additions of covariant return types to java.nio.ByteBuffer methods
Date Tue, 08 Jan 2019 20:12:00 GMT

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-3215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ASF GitHub Bot updated ZOOKEEPER-3215:
--------------------------------------
    Labels: pull-request-available  (was: )

> Handle Java 9/11 additions of covariant return types to java.nio.ByteBuffer methods
> -----------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-3215
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3215
>             Project: ZooKeeper
>          Issue Type: Bug
>    Affects Versions: 3.4.13
>            Reporter: V
>            Priority: Minor
>              Labels: pull-request-available
>
> Java 9 introduces covariant return types which allows one to have different return types
if return type in the overridden method is a sub type. Since Java 9, few functions return
ByteBuffer, whereas the parent method return Buffer, resulting in causing issues for Java
8 and below since for them the method does not exist.
> Steps To Reproduce:
> 1. Setup ZooKeeper Server with JDK11.
> 2. Setup ZooKeeper Client with JDK8.
> 3. Try connecting the client and server.
> Results:
> Cast ByteBuffer instances to Buffer before calling the method.
>  
> Notes:
> There was a similar bug in the MongoDB community - [https://jira.mongodb.org/browse/JAVA-2559]
>  
> This is not a contribution.



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