[jira] [Updated] (HBASE-9904) Solve skipping data in HTable scans

["Elliott Clark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-9904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Elliott Clark updated HBASE-9904:
---------------------------------
    Resolution: Won't Fix
        Status: Resolved  (was: Patch Available)

> Solve skipping data in HTable scans
> -----------------------------------
>
>                 Key: HBASE-9904
>                 URL: https://issues.apache.org/jira/browse/HBASE-9904
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>    Affects Versions: 0.89-fb
>            Reporter: Manukranth Kolloju
>             Fix For: 0.89-fb
>
>         Attachments: TestScanRetries.java, scan.diff
>
>
> The HTable client cannot retry a scan operation in the getRegionServerWithRetries code path.
> This will result in the client missing data. This can be worked around using hbase.client.retries.number to 1.
> The whole problem is that Callable knows nothing about retries and the protocol it dances to as well doesn't support retires.
> This fix will keep Callable protocol (ugly thing worth merciless refactoring) intact but will change
> ScannerCallable to anticipate retries. What we want is to make failed operations to be identities for outside world:
> N1 , N2 , F3 , N3 , F4 , F4 , N4 ... = N1 , N2 , N3 , N4 ...
> where Nk are successful operation and Fk are failed operations.



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