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https://issues.apache.org/jira/browse/SPARK-27275?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-27275:
----------------------------------
    Affects Version/s: 2.2.0
                       2.3.0

> Potential corruption in EncryptedMessage.transferTo
> ---------------------------------------------------
>
>                 Key: SPARK-27275
>                 URL: https://issues.apache.org/jira/browse/SPARK-27275
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.2.0, 2.3.0, 2.4.0
>            Reporter: Shixiong Zhu
>            Assignee: Shixiong Zhu
>            Priority: Major
>              Labels: correctness
>             Fix For: 2.3.4, 2.4.2, 3.0.0
>
>
> `EncryptedMessage.transferTo` has a potential corruption issue. When the 
> underlying buffer has more than `1024 * 32` bytes (this should be rare but it 
> could happen in error messages that send over the wire), it may just send a 
> partial message as `EncryptedMessage.count` becomes less than `transferred`. 
> This will cause the client hang forever (or timeout) as it will wait until 
> receiving expected length of bytes,  or weird errors (such as corruption or 
> silent correctness issue) if the channel is reused by other messages.



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