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https://issues.apache.org/jira/browse/HDDS-13943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Attila Doroszlai updated HDDS-13943:
------------------------------------
    Priority: Minor  (was: Major)

> Add input validation for protocol format in DirstreamClientHandler to prevent 
> ArrayIndexOutOfBoundsException
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: HDDS-13943
>                 URL: https://issues.apache.org/jira/browse/HDDS-13943
>             Project: Apache Ozone
>          Issue Type: Improvement
>            Reporter: Huang Guan Hao
>            Assignee: Huang Guan Hao
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 2.2.0
>
>
> The `DirstreamClientHandler` directly accesses `parts[1]` after splitting 
> `currentFileName` without validating the split result length. While the 
> server-side protocol guarantees the format `SIZE FILENAME` (with space), the 
> client should validate input to handle network errors, protocol version 
> mismatches, malicious input, or implementation errors.
> Currently, if the format is incorrect (e.g., no space), `split(" ", 2)` 
> returns an array of length 1, and accessing `parts[1]` throws 
> `ArrayIndexOutOfBoundsException`, which is not a user-friendly error.



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