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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2136) 1073: Fault injection for StorageDirectory failures during read/write of FSImage/Edits files
Date Wed, 13 Jul 2011 23:10:59 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13064939#comment-13064939
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Eli Collins commented on HDFS-2136:
-----------------------------------

@Matt, #2 means the code contains hooks for generating a fault/behavior and the test code
triggers the hooks. See the test he referenced for an example. 

@Cos, maybe you and Matt could sync up and you could write an AOP test for a case Matt is
thinking of to compare against.  

> 1073: Fault injection for StorageDirectory failures during read/write of FSImage/Edits
files
> --------------------------------------------------------------------------------------------
>
>                 Key: HDFS-2136
>                 URL: https://issues.apache.org/jira/browse/HDFS-2136
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Matt Foley
>
> Both HDFS-1955 and HDFS-2135 have observed that it is difficult to unit test such failures.
 As a result, regression of HDFS-1955 was only found by careful manual review (thanks, atm!).
 Since 1073 is making broad changes to the way these files are read and written, and appropriately
putting effort into correct error handling, I propose we make also make it possible to auto-test
that error handling.

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