[jira] [Closed] (KYLIN-4405) Internal exception when trying to build cube whose modal has null PartitionDesc

["Xiaoxiang Yu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KYLIN-4405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiaoxiang Yu closed KYLIN-4405.
-------------------------------

Resolved in release 3.1.0 (2020-07-03)

> Internal exception when trying to build cube whose modal has null PartitionDesc 
> --------------------------------------------------------------------------------
>
>                 Key: KYLIN-4405
>                 URL: https://issues.apache.org/jira/browse/KYLIN-4405
>             Project: Kylin
>          Issue Type: Bug
>          Components: Job Engine
>    Affects Versions: v2.6.2
>            Reporter: Chester Liu
>            Assignee: Chester Liu
>            Priority: Minor
>             Fix For: v3.1.0, v3.0.2, v2.6.6
>
>
> We are using 2.6.2 in our production environment and came upon this exception. We build our model and cube using the REST api, which allows null partitionDesc in a kylin model. However, when we try to build the cube related to the model, this exception occurs:
>  
> {{org.apache.kylin.rest.exception.InternalErrorException}}
>  {{org.apache.kylin.rest.controller.CubeController.buildInternal(CubeController.java:398)org.apache.kylin.rest.controller.CubeController.rebuild(CubeController.java:354)}}
>  {{org.apache.kylin.rest.controller.CubeController.build(CubeController.java:343)}}
>  {{sun.reflect.GeneratedMethodAccessor233.invoke(Unknown Source)sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)}}
>  {{java.lang.reflect.Method.invoke(Method.java:497)}}
>  {{...}}
>  {{Caused by: java.lang.NullPointerException}}
>  {{org.apache.kylin.cube.CubeManager$SegmentAssist.appendSegment(CubeManager.java:695)}}
>  {{org.apache.kylin.cube.CubeManager.appendSegment(CubeManager.java:638)}}
>  {{org.apache.kylin.cube.CubeManager.appendSegment(CubeManager.java:630)}}
>  {{org.apache.kylin.rest.service.JobService.submitJobInternal(JobService.java:233)}}
>  {{org.apache.kylin.rest.service.JobService.submitJob(JobService.java:202)}}
>  {{org.apache.kylin.rest.controller.CubeController.buildInternal(CubeController.java:394)}}
> Our current solution is using a not-null partitionDesc with empty partitionDateColumn. But I think ultimately a null partitionDesc makes more sense to me when our data source is not partitioned in the first place.
> I searched the codebase for null-checking of partitionDesc and found several of them. So I think an extra null-check should be added.
>   



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