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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19694) The initialization order for a fresh cluster is incorrect
Date Thu, 11 Jan 2018 14:32:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16322317#comment-16322317
] 

Duo Zhang commented on HBASE-19694:
-----------------------------------

You could try removing the wait until connected logic in ReadOnlyZKClient to see if the keepalive
change is enough.

> The initialization order for a fresh cluster is incorrect
> ---------------------------------------------------------
>
>                 Key: HBASE-19694
>                 URL: https://issues.apache.org/jira/browse/HBASE-19694
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Duo Zhang
>            Assignee: stack
>            Priority: Critical
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-19694.branch-2.001.patch, HBASE-19694.branch-2.002.patch,
HBASE-19694.branch-2.003.patch, HBASE-19694.branch-2.004.patch, HBASE-19694.branch-2.005.patch,
HBASE-19694.branch-2.006.patch, HBASE-19694.branch-2.007.patch, HBASE-19694.branch-2.008.patch,
HBASE-19694.branch-2.009.patch
>
>
> The cluster id will set once we become the active master in finishActiveMasterInitialization,
but the blockUntilBecomingActiveMaster and finishActiveMasterInitialization are both called
in a thread to make the constructor of HMaster return without blocking. And since HMaster
itself is also a HRegionServer, it will create a Connection and then start calling reportForDuty.
And when creating the ConnectionImplementation, we will read the cluster id from zk, but the
cluster id may have not been set yet since it is set in another thread, we will get an exception
and use the default cluster id instead.
> I always get this when running UTs which will start a mini cluster
> {noformat}
> 2018-01-03 15:16:37,916 WARN  [M:0;zhangduo-ubuntu:32848] client.ConnectionImplementation(528):
Retrieve cluster id failed
> java.util.concurrent.ExecutionException: org.apache.zookeeper.KeeperException$NoNodeException:
KeeperErrorCode = NoNode for /hbase/hbaseid
> 	at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
> 	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895)
> 	at org.apache.hadoop.hbase.client.ConnectionImplementation.retrieveClusterId(ConnectionImplementation.java:526)
> 	at org.apache.hadoop.hbase.client.ConnectionImplementation.<init>(ConnectionImplementation.java:286)
> 	at org.apache.hadoop.hbase.client.ConnectionUtils$ShortCircuitingClusterConnection.<init>(ConnectionUtils.java:141)
> 	at org.apache.hadoop.hbase.client.ConnectionUtils$ShortCircuitingClusterConnection.<init>(ConnectionUtils.java:137)
> 	at org.apache.hadoop.hbase.client.ConnectionUtils.createShortCircuitConnection(ConnectionUtils.java:185)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.createClusterConnection(HRegionServer.java:781)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.setupClusterConnection(HRegionServer.java:812)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.preRegistrationInitialization(HRegionServer.java:827)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:938)
> 	at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:550)
> 	at java.lang.Thread.run(Thread.java:748)
> Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
for /hbase/hbaseid
> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> 	at org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient$ZKTask$1.exec(ReadOnlyZKClient.java:163)
> 	at org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient.run(ReadOnlyZKClient.java:311)
> 	... 1 more
> {noformat}



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