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Posted to issues@kylin.apache.org by "RenZhiMin (JIRA)" <ji...@apache.org> on 2018/03/19 03:44:00 UTC

[jira] [Created] (KYLIN-3296) cube合并时,java.lang.ArrayIndexOutOfBoundsException at java.lang.System.arraycopy(Native Method)

RenZhiMin created KYLIN-3296:
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             Summary: cube合并时,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: Others
    Affects Versions: v2.3.0
            Reporter: RenZhiMin
         Attachments: RowKeySplitter.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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