[jira] [Updated] (KYLIN-5319) Occasional failure to query the real-time model, reporting NPE

[Jiale He (Jira)]

     [ 
https://issues.apache.org/jira/browse/KYLIN-5319?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Jiale He updated KYLIN-5319:
----------------------------
    Attachment:     (was: KYLIN-5319 查询元数据变更导致NPE.pdf)

> Occasional failure to query the real-time model, reporting NPE
> --------------------------------------------------------------
>
>                 Key: KYLIN-5319
>                 URL: https://issues.apache.org/jira/browse/KYLIN-5319
>             Project: Kylin
>          Issue Type: Bug
>          Components: Query Engine
>            Reporter: Jiale He
>            Priority: Major
>             Fix For: 5.0-alpha
>
>         Attachments: KYLIN-5319 查询元数据变更导致NPE.pdf
>
>
> 这个问题是因为
> Segment Merge 完毕后，元数据更新结束的节点大量并发查询，
> FilePruner中DataFlow变量的Segment元数据懒加载导致的。
> 因为懒加载导致dataflow中元数据不一致。
>  
> 详细的RC分析和Fix Design 见{color:#de350b}*附件*{color}



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