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https://issues.apache.org/jira/browse/KYLIN-3296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16411328#comment-16411328
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Shaofeng SHI commented on KYLIN-3296:
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The patch is not properly generated, which has too many changes. Please use a
newly created branch to generate the patch.
BTW, using fixed_length 500 as the encoding is terrable. As a dimension, please
keep the length as short as possible, usually don't be more than 50 characters
I think.
> 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
> 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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