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https://issues.apache.org/jira/browse/KYLIN-1104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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fengYu updated KYLIN-1104:
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    Attachment: 0001-bytes-split-max-length-limit.patch

> Long dimension value casue ArrayIndexOutOfBoundsException
> ---------------------------------------------------------
>
>                 Key: KYLIN-1104
>                 URL: https://issues.apache.org/jira/browse/KYLIN-1104
>             Project: Kylin
>          Issue Type: Bug
>            Reporter: fengYu
>            Assignee: Shaofeng SHI
>             Fix For: v1.3
>
>         Attachments: 0001-.patch, 0001-bug.patch, 
> 0001-bytes-split-max-length-limit.patch
>
>
> I get ArrayIndexOutOfBoundsException while building cube, and the error is 
> caused by one dimension(I think measure can not be so long) value is longer 
> than 4096 bytes.
> I check source code and find the reason:
> 1、it specify max split length is 4096 when create BytesSplitter object in 
> setup.
> 2、in BytesSplitter.split function which split all items in one row with 
> delimiter, and using System.arraycopy(bytes, offset, split.value, 0, length); 
> copy every item to a SplittedBytes object named split. and before this line , 
> it execute split.length = length; to set the split length.
> 3、while executing the copy code, it throw ArrayIndexOutOfBoundsException 
> because the real item length is bigger than 4096!
> 4、in mapper function, the exception will catched and execute 
> handleErrorRecord function to handle it, However, in this function it will 
> call use splits again(in toString function), ArrayIndexOutOfBoundsException 
> will throw again.
> 5、There is not one catch this exception, which casue the mapper execute 
> failed.
> That is all my situation and analysis, I will modify source code to continue 
> my job building and I will upload my patch later.



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