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https://issues.apache.org/jira/browse/HBASE-1156?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HBASE-1156 started by Jim Kellerman.
> Improve lease handling
> ----------------------
>
> Key: HBASE-1156
> URL: https://issues.apache.org/jira/browse/HBASE-1156
> Project: Hadoop HBase
> Issue Type: Sub-task
> Components: master, regionserver
> Affects Versions: 0.19.0
> Reporter: Jim Kellerman
> Assignee: Jim Kellerman
> Fix For: 0.20.0
>
>
> Currently, if a region server crashes and then restarts, it cannot be given
> work until its lease times out. This is because a lease is only identified by
> ipaddress:portnumber. If leases were also identified with the start code, the
> server could be given work immediately, because its log file includes the
> start code and will not interfere with the recovery of the log from its
> previous incarnation.
> Additionally, we wait in a master server thread for the server to leave the
> dead servers list because dead servers are not identified by their start code
> either. Waiting in a master server thread ties up that thread (possibly for
> quite some time), and rather than waiting, we should throw an exception as
> the region server already knows how to deal with an exception thrown from a
> regionServerStartup call.
> Finally, there is a bit of code cleanup that needs to be done in the region
> server when it receives a MSG_CALL_SERVER_STARTUP response from the master.
> It should not set up the HLog until reportForDuty completes
> successfully (which is what it does on the initial reportForDuty call.
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