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Posted to dev@mina.apache.org by "Thomas Wolf (Jira)" <ji...@apache.org> on 2023/05/17 21:07:00 UTC

[jira] [Commented] (SSHD-1327) WriteState causes memory overflow

    [ https://issues.apache.org/jira/browse/SSHD-1327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17723734#comment-17723734 ] 

Thomas Wolf commented on SSHD-1327:
-----------------------------------

[PR 374|https://github.com/apache/mina-sshd/pull/374] set that {{lastWrite}} to {{null}} when the future is done (i.e., when the whole buffer has been written).

> WriteState causes memory overflow
> ---------------------------------
>
>                 Key: SSHD-1327
>                 URL: https://issues.apache.org/jira/browse/SSHD-1327
>             Project: MINA SSHD
>          Issue Type: Bug
>            Reporter: fuzhoupeng
>            Priority: Major
>         Attachments: image-2023-05-16-09-58-04-005.png, image-2023-05-16-10-03-30-225.png, image-2023-05-16-10-03-44-339.png, image-2023-05-16-10-04-31-679.png, image-2023-05-16-10-04-53-165.png, image-2023-05-16-10-06-12-880.png, image-2023-05-16-10-12-13-163.png, image-2023-05-16-10-12-23-189.png
>
>
> When data is written to a channel, the writeBuffer method is invoked, and a writeState is recorded.
> !image-2023-05-16-10-03-44-339.png!
>  
> WriteState records the last sent packet, which causes memory overflow.
> !image-2023-05-16-10-04-31-679.png!
> !image-2023-05-16-10-06-12-880.png!
>  
> When a large number of devices are managed and a large number of packets are delivered last time, the cached packets delivered last time cause service memory overflow.
> !image-2023-05-16-10-12-13-163.png!
> !image-2023-05-16-10-12-23-189.png!
>  



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