[jira] [Assigned] (KYLIN-5320) After the model is deleted, an abnormal error occurs when querying historical statistics

["Jiale He (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KYLIN-5320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jiale He reassigned KYLIN-5320:
-------------------------------

    Assignee: Jiale He

> After the model is deleted, an abnormal error occurs when querying historical statistics
> ----------------------------------------------------------------------------------------
>
>                 Key: KYLIN-5320
>                 URL: https://issues.apache.org/jira/browse/KYLIN-5320
>             Project: Kylin
>          Issue Type: Bug
>          Components: Others
>            Reporter: Jiale He
>            Assignee: Jiale He
>            Priority: Major
>             Fix For: 5.0-alpha
>
>
> h1. 复现步骤：
> 当查询击中模型后，然后删除模型，
> 查询历史统计信息的定时器在更新模型击中信息元数据时，会捞取查询历史，
> 此时会获取被删除模型的查询历史，然后再事务更新的时候，漏判断了是否模型被删除，
> 这样会导致事务更新失败。
> 由于一直更新失败，所以查询历史的 offset 也一直没有更新，最终在页面上就显示模型击中次数，索引击中次数一致没变。
>  
> h1. Root Cause & Dev Design
> 在更新 dataflow 的最新更新时间时，需要确认 dataflow 是否存在，如果不存在，则跳过。



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