Re: 答复: kylin 手动合并（merge）报错问题

[ShaoFeng Shi <sh...@apache.org>]

From the source code where the NPE be thrown, we can see it seems the cube
statistics file wasn't found in Kylin meta store. It seems your metadata is
incomplete:

https://github.com/apache/kylin/blob/2.2.x/engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/MergeStatisticsStep.java#L80

Best regards,

Shaofeng Shi 史少锋
Apache Kylin PMC
Work email: shaofeng.shi@kyligence.io
Kyligence Inc: https://kyligence.io/

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王林 <10...@qq.com> 于2019年1月31日周四 下午5:11写道：

> 2.2.0
>
>
>
>
> ------------------ 原始邮件 ------------------
> 发件人: "Na Zhai"<na...@kyligence.io>;
> 发送时间: 2019年1月31日(星期四) 下午2:54
> 收件人: "dev@kylin.apache.org"<de...@kylin.apache.org>;
>
> 主题: 答复: kylin 手动合并（merge）报错问题
>
>
>
> Hi, wanglin.
>
>        What’s your Kylin version? There is an issue about auto merge:
> https://issues.apache.org/jira/browse/KYLIN-3718.
>
> But I think your error is not related to that issue. It is may be caused
> by the deletion of cube_statistics directory.
>
>
>
> 发送自 Windows 10 版邮件<https://go.microsoft.com/fwlink/?LinkId=550986>应用
>
>
>
> ________________________________
> 发件人: 王林 <10...@qq.com>
> 发送时间: Monday, January 28, 2019 10:23:37 AM
> 收件人: dev
> 主题: kylin 手动合并（merge）报错问题
>
> 你好：
>   我使用kylin 创建了一个cube，开启了自动合并功能，合并周期为7天，28天。
> 但是发现kylin 自动合并功能没有生效，然后手动合并cube，合并最近几天的没有问题，但是合并以前的就报错信息如下：
>
>
> 报错步骤：#2 Step Name: Merge Cuboid Statistics Duration:
> 0.01 mins                     Waiting:                      0 seconds
> 报错日志：java.lang.NullPointerException
>         at org.apache.kylin.engine.mr.steps.MergeStatisticsStep.doWork(MergeStatisticsStep.java:80)
>     at
> org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:125)
>       at
> org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:64)
>     at
> org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:125)
>       at
> org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:144)
>       at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>      at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>      at java.lang.Thread.run(Thread.java:745)
> 请教是什么原因。
> 谢谢