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https://issues.apache.org/jira/browse/HBASE-7170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gregory Chanan updated HBASE-7170:
----------------------------------

    Attachment: HBASE-7170.patch

Here's a patch that illustrates the problem and fixes it.

This backports HBASE-6606 (the testUnmanagedHConnectionReconnect test in 
TestFromClientSide) to 0.94.  The test causes the master to die and a new 
master to come back up in TestFromClientSide.

But due to HBASE-5051, all the tests in TestFromClientSide use the same 
HBaseAdmin, so all the tests that are executed after 
testUnmanagedHConnectionReconnect fail.
                
> [0.94 branch] Allow HConnectionImplementation to reconnect to master multiple 
> times
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-7170
>                 URL: https://issues.apache.org/jira/browse/HBASE-7170
>             Project: HBase
>          Issue Type: Task
>            Reporter: Gregory Chanan
>            Assignee: Gregory Chanan
>            Priority: Minor
>             Fix For: 0.94.4
>
>         Attachments: HBASE-7170.patch
>
>
> HBASE-5058 retained the old behavior of managed HConnections not retrying 
> their connection to master b/c of the "masterChecked" variable.
> This behavior isn't great though, because you can get in the following 
> situation:
> 1) Connect to master using HBaseAdmin
> 2) Master goes down
> 3) New master takes over
> 4) The HBaseAdmin object is now useless
> The client needs to create a new HBaseAdmin in this case.

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