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https://issues.apache.org/jira/browse/KYLIN-4753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17193396#comment-17193396
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ASF GitHub Bot commented on KYLIN-4753:
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jshmchenxi commented on pull request #1402:
URL: https://github.com/apache/kylin/pull/1402#issuecomment-690015060
@shaofengshi Hi, this is a simple patch and the failed test seems to be
irrelevant. Would you please take a look?
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> Merging job stop working after Kylin upgrade
> --------------------------------------------
>
> Key: KYLIN-4753
> URL: https://issues.apache.org/jira/browse/KYLIN-4753
> Project: Kylin
> Issue Type: Bug
> Components: Job Engine
> Affects Versions: v3.0.0, v2.6.4
> Reporter: Xi Chen
> Priority: Major
>
> Cubes stop auto merging after upgrading to Kylin to 2.6.4+ or 3.0.0+.
> Following stack is thrown in log:
> {code:java}
> 2020-09-09 17:57:52 ERROR - [Thread-1131] -
> org.apache.kylin.rest.service.CacheService$1$1(83) - Error in
> updateOnNewSegmentReady() java.lang.NullPointerException at
> org.apache.kylin.rest.service.CubeService.isMergingJobBeenDiscarded(CubeService.java:800)
> at
> org.apache.kylin.rest.service.CubeService.mergeCubeSegment(CubeService.java:776)
> at
> org.apache.kylin.rest.service.CubeService.updateOnNewSegmentReady(CubeService.java:722)
> at
> org.apache.kylin.rest.service.CubeService$$FastClassBySpringCGLIB$$17a07c0e.invoke(<generated>)
> at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
> at
> org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:667)
> at
> org.apache.kylin.rest.service.CubeService$$EnhancerBySpringCGLIB$$1737fa4f.updateOnNewSegmentReady(<generated>)
> at org.apache.kylin.rest.service.CacheService$1$1.run(CacheService.java:81)
> {code}
> If cube has segments discarded before upgrading, the job instance does not
> have `segmentName` param. The problem is brought in KYLIN-4057.
>
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