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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HBASE-727) Client caught in an infinite loop when trying to connect to cached server locations
Date Tue, 08 Jul 2008 23:20:31 GMT

     [ https://issues.apache.org/jira/browse/HBASE-727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack resolved HBASE-727.
-------------------------

       Resolution: Fixed
    Fix Version/s: 0.2.0

Committed.  Thanks for the patch Izaak.

> Client caught in an infinite loop when trying to connect to cached server locations
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-727
>                 URL: https://issues.apache.org/jira/browse/HBASE-727
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: client, ipc
>            Reporter: Izaak Rubin
>            Assignee: Izaak Rubin
>            Priority: Minor
>             Fix For: 0.2.0
>
>         Attachments: hbase-727_logfile_sample.txt, hbase_727.patch
>
>
> HbaseRPC, which (to my understanding) is used whenever there is a need to connect to
a server, enters an infinite loop to continually retry the connection until it succeeds. 
This makes sense for server-to-server interaction, but it doesn't necessarily make sense for
all client-to-server interaction.
> The problem I first observed was in doing fast restarts of HBase.  When I attempted to
reload the UI after a restart, it would infinitely try to re-contact the cached server location
from before the restart.  The correct behavior would be to break out of the loop as soon as
possible in situations like the one above.  I think that throwing a RetriesExhaustedException
would be the best way to do this, although if anyone has any suggestions please let me know.

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