[
https://issues.apache.org/jira/browse/KYLIN-4017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16849583#comment-16849583
]
ASF GitHub Bot commented on KYLIN-4017:
---------------------------------------
wangxiaojing123 commented on pull request #664: KYLIN-4017 Build engine get
zk(zookeeper) lock failed when building job, it causes the whole build engine
doesn't work
URL: https://github.com/apache/kylin/pull/664
```
【Type】：BUG
【Severity】：1-Blocker
【Module】：Build Engine
【Description】：Kylin build engine occasionally appears to be unable to get
the ZK lock exception, and once this build engine appears, it will not work and
can only be restarted to solve.Usually this problem will recur one day after
the build engine starts.
【Design】：Setting the cache for curator is never invalid (unless the service
stops) and check the state before use curator instance (if closed ,create a new
curator instance and put into the cache)
```
```
issue: https://issues.apache.org/jira/browse/KYLIN-4017
```
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> Build engine get zk(zookeeper) lock failed when building job, it causes the
> whole build engine doesn't work.
> ------------------------------------------------------------------------------------------------------------
>
> Key: KYLIN-4017
> URL: https://issues.apache.org/jira/browse/KYLIN-4017
> Project: Kylin
> Issue Type: Bug
> Components: Job Engine, Tools, Build and Test
> Affects Versions: Future, v3.0.0, v3.0.0-alpha
> Reporter: wangxiaojing
> Priority: Critical
> Labels: build
> Fix For: Future, v3.0.0-alpha
>
> Attachments: zkinstancestart.png
>
>
> Kylin has ZK acquisition lock exception when it is building job. Only restart
> can solve this problem. Otherwise, it can't build job ,the whole build engine
> doesn't work.This problem will continue to occur one day after restart. Log
> looks like below:
> {code:java}
> 2019-05-15 11:09:43,209 INFO [FetcherRunner 1910115020-57]
> threadpool.FetcherRunner:59 :
> CubingJob{id=878974c4-4c65-88a4-a912-b238fcc33bdc, name=BUILD CUBE -
> es_report_respnse_rate_cube - 20190513000000_20190514000000 - GMT+08:00
> 2019-05-15 11:03:15, state=READY} prepare to schedule and its priority is 20
> 2019-05-15 11:09:43,209 INFO [FetcherRunner 1910115020-57]
> threadpool.FetcherRunner:63 :
> CubingJob{id=878974c4-4c65-88a4-a912-b238fcc33bdc, name=BUILD CUBE -
> es_report_respnse_rate_cube - 20190513000000_20190514000000 - GMT+08:00
> 2019-05-15 11:03:15, state=READY} scheduled
> 2019-05-15 11:09:43,209 DEBUG [Scheduler 719764581 Job
> 878974c4-4c65-88a4-a912-b238fcc33bdc-132]
> zookeeper.ZookeeperDistributedLock:92 :
> 18...@bigdata-kylin-build01.gz01.diditaxi.com trying to lock
> /job_engine/lock/878974c4-4c65-88a4-a912-b238fcc33bdc
> 2019-05-15 11:09:43,212 ERROR [pool-12-thread-10]
> threadpool.DistributedScheduler:115 : unknown error execute
> job:878974c4-4c65-88a4-a912-b238fcc33bdc in server:
> 18...@bigdata-kylin-build01.gz01.diditaxi.com
> java.lang.IllegalStateException: Error while
> 18...@bigdata-kylin-build01.gz01.diditaxi.com trying to lock
> /job_engine/lock/878974c4-4c65-88a4-a912-b238fcc33bdc
> at
> org.apache.kylin.job.lock.zookeeper.ZookeeperDistributedLock.lock(ZookeeperDistributedLock.java:99)
> at
> org.apache.kylin.job.lock.zookeeper.ZookeeperJobLock.lock(ZookeeperJobLock.java:41)
> at
> org.apache.kylin.job.impl.threadpool.DistributedScheduler$JobRunner.run(DistributedScheduler.java:105)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.IllegalStateException: instance must be started before
> calling this method
> at
> org.apache.curator.shaded.com.google.common.base.Preconditions.checkState(Preconditions.java:176)
> at
> org.apache.curator.framework.imps.CuratorFrameworkImpl.create(CuratorFrameworkImpl.java:351)
> at
> org.apache.kylin.job.lock.zookeeper.ZookeeperDistributedLock.lock(ZookeeperDistributedLock.java:95)
> ... 5 more{code}
>
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