[jira] [Created] (KYLIN-2059) Concurrent build issue in CubeManager.calculateToBeSegments()

["Shaofeng SHI (JIRA)" <ji...@apache.org>]

Shaofeng SHI created KYLIN-2059:
-----------------------------------

             Summary: Concurrent build issue in CubeManager.calculateToBeSegments()
                 Key: KYLIN-2059
                 URL: https://issues.apache.org/jira/browse/KYLIN-2059
             Project: Kylin
          Issue Type: Bug
          Components: Metadata
    Affects Versions: v1.6.0
            Reporter: Shaofeng SHI
            Assignee: Shaofeng SHI
             Fix For: v1.6.0


In 1.6.0 Kylin will allow multile segments be built concurently; A bug is found in CubeManager.calculateToBeSegments(), which will delete merging segments unexpectedly when another segment's build is finished.

{code}
java.lang.NullPointerException
	at org.apache.kylin.engine.mr.steps.UpdateCubeInfoAfterMergeStep.doWork(UpdateCubeInfoAfterMergeStep.java:69)
	at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:115)
	at org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:57)
	at org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:115)
	at org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:136)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

{code}



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