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https://issues.apache.org/jira/browse/HADOOP-2388?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jim Kellerman reassigned HADOOP-2388:
-------------------------------------

    Assignee: Bryan Duxbury

> [hbase] When a scanner lease times out, throw a more "user friendly" exception
> ------------------------------------------------------------------------------
>
>                 Key: HADOOP-2388
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2388
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/hbase
>            Reporter: Jim Kellerman
>            Assignee: Bryan Duxbury
>            Priority: Trivial
>
> Currently, if a client spends too much time between next() requests on a 
> scanner (or between scanner creation and the first call to next), the region 
> server will time out the scanner and close. The next call to next() will 
> receive an UnknownScannerException because all knowledge of the scanner was 
> wiped out on the server when the lease expired.
> The the client side scanner should keep a timer so it compute the elapsed 
> time between next() calls so that if it receives an UnknownScannerException, 
> it can determine if the scanner lease timed out and if so, throw a more "user 
> friendly" exception such as LeaseTimedOutException

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