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Posted to issues@hbase.apache.org by "Duo Zhang (Jira)" <ji...@apache.org> on 2020/07/24 13:23:00 UTC
[jira] [Updated] (HBASE-22060) postOpenDeployTasks could send
OPENED region transition state to the wrong master
[ https://issues.apache.org/jira/browse/HBASE-22060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Duo Zhang updated HBASE-22060:
------------------------------
Resolution: Implemented
Status: Resolved (was: Patch Available)
Should have been solved by HBASE-22074.
> postOpenDeployTasks could send OPENED region transition state to the wrong master
> ---------------------------------------------------------------------------------
>
> Key: HBASE-22060
> URL: https://issues.apache.org/jira/browse/HBASE-22060
> Project: HBase
> Issue Type: Bug
> Components: amv2, proc-v2
> Affects Versions: 3.0.0-alpha-1
> Reporter: Bahram Chehrazy
> Assignee: Duo Zhang
> Priority: Critical
> Attachments: Reset-cached-rssStub-on-region-servers-as-soon-as-the-master-changes-v2.patch
>
>
> As was reported in HBASE-21788, we have repeatedly seen regions getting stuck in OPENING after master restarts. Here is one scenario that I've observed recently:
>
> 1) There is a region is transit (RIT).
> 2) The active master aborts and begins shutting down.
> 3) The backup master becomes active quickly, finds the RIT, creates OpenRegionProcedure and send request to some server.
> 4) The server quickly opens the region and posts OPENED state transition, but it uses its cached master instead of the new one.
> 5) The old active master which had not completely shutdown its assignment manager yet, notes the OPENED state report and ignores it. Because no corresponding procedure can be found.
> 6) The new master waits forever for a response to its OPEN region request.
>
> This happens more often with the meta region because it's small and takes a few seconds to open. Below are some related logs:
> *Previous HMaster:*
> 2019-03-14 13:19:16,310 ERROR [PEWorker-1] master.HMaster: ***** ABORTING master <master-1>,17000,1552438242232: Shutting down HBase cluster: file system not available *****
> 2019-03-14 13:19:16,310 INFO [PEWorker-1] regionserver.HRegionServer: ***** STOPPING region server '<master-1>,17000,1552438242232' *****
> 2019-03-14 13:20:54,358 WARN [RpcServer.priority.FPBQ.Fifo.handler=11,queue=1,port=17000] assignment.AssignmentManager: No matching procedure found for rit=OPEN, location=*************,17020,1552561955412, table=hbase:meta, region=1588230740 transition to OPENED
> 2019-03-14 13:20:55,707 INFO [master/<master-1>:17000] assignment.AssignmentManager: Stopping assignment manager
> *New HMaster logs:*
> 2019-03-14 13:19:16,907 INFO [master/<master-2>:17000:becomeActiveMaster] master.ActiveMasterManager: Deleting ZNode for /HBaseServerZnodeCommonDir/**************/backup-masters/<master-2>,17000,1552438259871 from backup master directory
> 2019-03-14 13:19:17,031 INFO [master/<master-2>:17000:becomeActiveMaster] master.ActiveMasterManager: Registered as active master=<master-2>,17000,1552438259871
> 2019-03-14 13:20:52,017 INFO [PEWorker-12] zookeeper.MetaTableLocator: Setting hbase:meta (replicaId=0) location in ZooKeeper as <server-1>,17020,1552536956826
> 2019-03-14 13:20:52,105 INFO [PEWorker-12] procedure2.ProcedureExecutor: Initialized subprocedures=[\{pid=178230, ppid=178229, state=RUNNABLE, hasLock=false; org.apache.hadoop.hbase.master.assignment.OpenRegionProcedure}]
>
> *HServer logs:*
> 2019-03-14 13:20:52,708 INFO [RS_CLOSE_META-regionserver/<server-1>:17020-0] handler.AssignRegionHandler: Open hbase:meta,,1.1588230740
> 2019-03-14 13:20:54,353 INFO [RS_CLOSE_META-regionserver/<server-1>:17020-0] regionserver.HRegion: Opened 1588230740; next sequenceid=229166
> 2019-03-14 13:20:54,356 INFO [RS_CLOSE_META-regionserver/<server-1>:17020-0] regionserver.HRegionServer: Post open deploy tasks for hbase:meta,,1.1588230740
> 2019-03-14 13:20:54,358 INFO [RS_CLOSE_META-regionserver/<server-1>:17020-0] handler.AssignRegionHandler: Opened hbase:meta,,1.1588230740
>
>
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