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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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Wenchen Fan resolved SPARK-27275.
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Resolution: Fixed
Fix Version/s: 3.0.0
> 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: 2.4.0
> Reporter: Shixiong Zhu
> Assignee: Shixiong Zhu
> Priority: Major
> Labels: correctness
> Fix For: 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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