[jira] [Commented] (IOTDB-5726) Cross compaction cannot select any seq files

["周沛辰 (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IOTDB-5726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17704534#comment-17704534 ] 

周沛辰 commented on IOTDB-5726:
----------------------------

有两个用户都报了这个问题。问题描述：文件没有重叠，却被放在了乱序区里，导致跨空间选文件的时候选不到与其有重叠的顺序文件，导致该分区下永远无法触发跨空间合并。

用户1：从0.11升级到0.12，然后直接升级到0.13.3。大部分数据是0.11上生成的，少量是0.12生成的。使用工具排查后的日志详见“overlap.txt”。其中有问题的文件里包含0层文件。

 

用户2：从0.13.1升级到0.13.3，有问题的设备都是在0.13.1上生成的。存在两个sg下有这个问题，工具排查后的日志详见“text.txt”和“testtq12.txt”，具体系统的compaction和all日志详见文档。

> Cross compaction cannot select any seq files
> --------------------------------------------
>
>                 Key: IOTDB-5726
>                 URL: https://issues.apache.org/jira/browse/IOTDB-5726
>             Project: Apache IoTDB
>          Issue Type: Bug
>    Affects Versions: 0.13.3
>            Reporter: 周沛辰
>            Assignee: 周沛辰
>            Priority: Major
>         Attachments: image-2023-03-24-17-03-00-462.png
>
>
> !image-2023-03-24-17-03-00-462.png|width=691,height=288!
> *Phenomenon*
> Cross compaction select one unseq file but cannot select any seq files.
>  
> After preliminary investigation, it is found that there are indeed a large number of unseq files which do not overlap with any seq files. There are two specific cases: 1. The devices under the unseq files do not exist in the seq files. 2. The device of the unseq file exists in the seq file, but unseqDevice.startTime>seqDevice.endTime.
>  
>  



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