wangxiaojing created KYLIN-4136:
-----------------------------------

             Summary: Real time streaming segment building may save the same 
cube segment twice in some case
                 Key: KYLIN-4136
                 URL: https://issues.apache.org/jira/browse/KYLIN-4136
             Project: Kylin
          Issue Type: Bug
    Affects Versions: v3.0.0
            Reporter: wangxiaojing
             Fix For: Future
         Attachments: image-2019-08-13-21-03-53-045.png

Real time streaming segment building may save the same cube segment whit new 
state twice in some case , that 's lead to can't build the segment success.
{code:java}
// exception
2019-08-13 20:22:09,644 ERROR [http-bio-8081-exec-64] 
coordinator.Coordinator:1127 : streaming job submit fail, 
cubeName:rt_common_task_state_change_v3_cl2 
segment:20190809195000_20190809200000
java.lang.IllegalStateException: Segments overlap: 
rt_common_task_state_change_v3_cl2[20190809195000_20190809200000] and 
rt_common_task_state_change_v3_cl2[20190809195000_20190809200000]
at org.apache.kylin.metadata.model.Segments.validate(Segments.java:426)
at org.apache.kylin.cube.CubeManager.updateCubeWithRetry(CubeManager.java:388)
at org.apache.kylin.cube.CubeManager.updateCube(CubeManager.java:301)
at 
org.apache.kylin.cube.CubeManager$SegmentAssist.appendSegment(CubeManager.java:742)
at org.apache.kylin.cube.CubeManager.appendSegment(CubeManager.java:662)
at org.apache.kylin.cube.CubeManager.appendSegment(CubeManager.java:650)
at 
org.apache.kylin.stream.coordinator.Coordinator.triggerSegmentBuild(Coordinator.java:1110)
at 
org.apache.kylin.stream.coordinator.Coordinator.tryFindAndBuildSegment(Coordinator.java:982)
at 
org.apache.kylin.stream.coordinator.Coordinator.segmentRemoteStoreComplete(Coordinator.java:294)
at 
org.apache.kylin.rest.service.StreamingCoordinatorService.onSegmentRemoteStoreComplete(StreamingCoordinatorService.java:114)
at 
org.apache.kylin.rest.controller.StreamingCoordinatorController.segmentRemoteStoreComplete(StreamingCoordinatorController.java:184)
at sun.reflect.GeneratedMethodAccessor106.invoke(Unknown Source)
at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at 
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at 
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at 
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at 
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at 
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at 
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at 
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at 
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
{code}
//debug

!image-2019-08-13-21-03-53-045.png!



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