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Posted to issues@kylin.apache.org by "Billy Liu (JIRA)" <ji...@apache.org> on 2018/03/28 08:28:00 UTC

[jira] [Assigned] (KYLIN-3296) When merge cube，get java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(Native Method)

     [ https://issues.apache.org/jira/browse/KYLIN-3296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Billy Liu reassigned KYLIN-3296:
--------------------------------

    Assignee: RenZhiMin

> When merge cube，get java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(Native Method)
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: KYLIN-3296
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3296
>             Project: Kylin
>          Issue Type: Bug
>          Components: Job Engine
>    Affects Versions: v2.3.0
>            Reporter: RenZhiMin
>            Assignee: RenZhiMin
>            Priority: Major
>              Labels: patch
>         Attachments: JIRA.master.3296.patch
>
>
> cube中，设计rowkey时，有个维度设置编码方式是固定长度500。每天采用内存构建算法。在合并cube时，在生成的mr中的map任务执行中出现“java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(Native Method)” 错误。经查看在生成的mr中的map任务中需要对要合并的cuboiddata数据的rowkey进行切分，切分时，根据每个维度的编码方式获取对应的长度，然后从rowkey中获取，并赋值给SplittedBytes的value中，由于value数组初始化时设置的固定值255，所以在切分大于255的维度值时，出现下标越界错误。



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