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https://issues.apache.org/jira/browse/KYLIN-5186?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ibrar Ahmed closed KYLIN-5186.
------------------------------
Resolution: Fixed
> few jobs do not get registered to a cluster for processing by scheduler
> -----------------------------------------------------------------------
>
> Key: KYLIN-5186
> URL: https://issues.apache.org/jira/browse/KYLIN-5186
> Project: Kylin
> Issue Type: Bug
> Components: Job Engine
> Affects Versions: v3.0.1
> Environment: EMR
> Reporter: Ibrar Ahmed
> Priority: Critical
>
> i am using kylin version:
> *Version: Apache kylin 3.0.1*
> Commit: 638a1eb68f257366d240105b33e5eea3bfa4dbf3
> i have *30+ kylin cube build jobs but* in a week one or two jobs are not
> getting registered in the cluster even though S{*}CHEDULER tries to send jobs
> to the cluster{*},
> its gets this error usually on step: *Build N-Dimension Cuboid :*
> get following error:
> {code:java}
> // code placeholder
> 1113546:2022-05-20 00:26:04,873 ERROR [Scheduler 1065041011 Job
> 7df4f62c-b58f-b959-8ae9-ee0e5b2438fb-112] common.HadoopJobStatusChecker:58 :
> error check status
> 1113559:2022-05-20 00:26:04,907 ERROR [Scheduler 1065041011 Job
> 7df4f62c-b58f-b959-8ae9-ee0e5b2438fb-112] common.MapReduceExecutable:259 :
> error execute MapReduceExecutable{id=7df4f62c-b58f-b959-8ae9-ee0e5b2438fb-11,
> name=Build N-Dimension Cuboid : level 6, state=RUNNING}
> 2022-05-17 23:45:28,237 ERROR [Scheduler 1065041011 Job
> 4cc6e7c9-98e6-3f3c-db26-5e45e0455cab-129] common.MapReduceExecutable:259 :
> error execute MapReduceExecutable{id=4cc6e7c9-98e6-3f3c-db26-5e45e0455cab-05,
> name=Build Base Cuboid, state=RUNNING}
> java.lang.RuntimeException:
> org.apache.kylin.job.exception.PersistentException: java.io.IOException:
> com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link
> failure
> The last packet sent successfully to the server was 0 milliseconds ago. The
> driver has not received any packets from the server.
> at
> org.apache.kylin.job.execution.ExecutableManager.getOutput(ExecutableManager.java:178)
> at
> org.apache.kylin.job.execution.AbstractExecutable.getOutput(AbstractExecutable.java:389)
> at
> org.apache.kylin.job.execution.AbstractExecutable.isDiscarded(AbstractExecutable.java:515)
>
> at
> org.apache.kylin.engine.mr.common.MapReduceExecutable.doWork(MapReduceExecutable.java:179)
> at
> org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:179)
> at
> org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:71)
> at
> org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:179)
> at
> org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:114)
>
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: org.apache.kylin.job.exception.PersistentException:
> java.io.IOException: com.mysql.cj.jdbc.exceptions.CommunicationsException:
> Communications link failure
> The last packet sent successfully to the server was 0 milliseconds ago. The
> driver has not received any packets from the server.
> at org.apache.kylin.job.dao.ExecutableDao.getJobOutput(ExecutableDao.java:407)
> at
> org.apache.kylin.job.execution.ExecutableManager.getOutput(ExecutableManager.java:173)
> ... 10 more
> Caused by: java.io.IOException:
> com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link
> failure {code}
> {*}Note{*}: if i *pause and resume* the jobs it gets registerd and {*}works
> fine{*}.
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