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https://issues.apache.org/jira/browse/HIVE-24577?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
guojh reassigned HIVE-24577:
----------------------------
Assignee: guojh
> Task resubmission bug
> ---------------------
>
> Key: HIVE-24577
> URL: https://issues.apache.org/jira/browse/HIVE-24577
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 2.3.4
> Environment: hive-2.3.4
> Reporter: guojh
> Assignee: guojh
> Priority: Major
>
> When hive execute jobs in parallel(control by “hive.exec.parallel”
> parameter), tasks submit to yarn with parallel. If the jobs completed
> simultaneously, then Their children task may submit more than ones.
> In our production cluster, we have a query with the stage dependencies is
> below:
> {code:java}
> STAGE DEPENDENCIES:
> Stage-1 is a root stage
> Stage-2 depends on stages: Stage-1, Stage-10, Stage-14
> Stage-7 depends on stages: Stage-2 , consists of Stage-4, Stage-3, Stage-5
> Stage-4
> Stage-0 depends on stages: Stage-4, Stage-3, Stage-6
> Stage-3
> Stage-5
> Stage-6 depends on stages: Stage-5
> Stage-18 is a root stage
> Stage-9 depends on stages: Stage-18
> Stage-10 depends on stages: Stage-9
> Stage-19 is a root stage
> Stage-13 depends on stages: Stage-19
> Stage-14 depends on stages: Stage-13
> {code}
> There is a certain probability that Stage-10 and Stage-14 will complete at
> the same time, then their children Stage-2 was submitted twice. As bellow log:
> {code:java}
> 2021-01-03T13:35:32,079 INFO [d207a1c7-287d-4f03-83c8-f2c42ed878a9 main]
> ql.Driver: Launching Job 6 out of 6
> 2021-01-03T13:35:32,080 INFO [d207a1c7-287d-4f03-83c8-f2c42ed878a9 main]
> ql.Driver: Starting task [Stage-2:MAPRED] in parallel
> 2021-01-03T13:35:32,082 INFO [d207a1c7-287d-4f03-83c8-f2c42ed878a9 main]
> ql.Driver: Launching Job 7 out of 6
> 2021-01-03T13:35:32,083 INFO [d207a1c7-287d-4f03-83c8-f2c42ed878a9 main]
> ql.Driver: Starting task [Stage-2:MAPRED] in parallel
> {code}
>
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