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From "Jesse Yates (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-6571) Generic multi-thread/cross-process error handling framework
Date Mon, 13 Aug 2012 21:46:38 GMT

     [ https://issues.apache.org/jira/browse/HBASE-6571?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jesse Yates updated HBASE-6571:
-------------------------------

    Attachment: Distributed Error Monitoring.docx
                java_HBASE-6571-v0.patch

Attaching patch and design doc, posting to RB momentarily.
                
> Generic multi-thread/cross-process error handling framework
> -----------------------------------------------------------
>
>                 Key: HBASE-6571
>                 URL: https://issues.apache.org/jira/browse/HBASE-6571
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>         Attachments: Distributed Error Monitoring.docx, java_HBASE-6571-v0.patch
>
>
> The idea for a generic inter-process error-handling framework came from working on HBASE-6055
(snapshots). Distributed snapshots require tight time constraints in taking a snapshot to
minimize offline time in face of errors. However, we often need to coordinate errors between
processes and the current Abortable framework is not sufficiently flexible to handle the multitude
of situations that can occur when coordinating between all region servers, the master and
zookeeper. Using this framework error handling for snapshots was a simple matter, amounting
to maybe 200 LOC.
> This seems to be a generally useful framework and can be used to easily add inter-process
error handling in HBase. The most obvious immediate usage is as part of HBASE-5487 when coordinating
multiple sub-tasks.

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