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https://issues.apache.org/jira/browse/RATIS-1587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17544090#comment-17544090
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Song Ziyang commented on RATIS-1587:
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[~szetszwo] please take a look. Is it appropriate to use the request uuid as
the name of tmp dir?
> InstallSnapshot fails when snapshot has multiple chunks
> -------------------------------------------------------
>
> Key: RATIS-1587
> URL: https://issues.apache.org/jira/browse/RATIS-1587
> Project: Ratis
> Issue Type: Bug
> Components: server
> Affects Versions: 2.3.0
> Reporter: Song Ziyang
> Priority: Major
> Attachments: image-2022-05-31-08-56-35-373.png,
> image-2022-05-31-08-58-44-717.png, image-2022-05-31-09-00-41-286.png
>
>
> *Bug Description*
> Currently, when follower install snapshot from leader, leader will divide
> snapshot files into a sequence of fixed size chunks (16MB) and send each
> through rpc.
> !image-2022-05-31-08-56-35-373.png!
> only the last rpc request in the sequence is tagged with 'Done'.
> !image-2022-05-31-08-58-44-717.png!
> However, when follower handles these sequence of rpcs, it will create *a
> random temp dir for each rpc request, store the chunk in, and only move the
> last chunk from tmp dir to sm dir.*
> *!image-2022-05-31-09-00-41-286.png!*
> Thus, when snapshot contains multiple files or a single file larger than
> 16MB, InstallSnapshot will fail because only last chunk is stored in the /sm
> dir and others are remained in many tmp dirs.
>
> *How To Fix*
> Instead of use random uuid to name tmp dir every time, it is possible to use
> the *request-uuid* to name the tmp dir. request-uuid is generated by leader
> once and is shared among the sequence of requests.
>
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