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From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7839) Add a script to simulate a dead machine during the integration tests
Date Wed, 29 May 2013 13:47:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13669258#comment-13669258

Nicolas Liochon commented on HBASE-7839:

Unixes don't like the sticky bit will shell tools. It's not possible (anymore) for perl for
example. I don't remember if it works with ruby or python, but the Unixes would aim at make
it not possible. 
> Add a script to simulate a dead machine during the integration tests
> --------------------------------------------------------------------
>                 Key: HBASE-7839
>                 URL: https://issues.apache.org/jira/browse/HBASE-7839
>             Project: HBase
>          Issue Type: New Feature
>          Components: test
>    Affects Versions: 0.95.2
>            Reporter: Nicolas Liochon
>            Assignee: Nicolas Liochon
>            Priority: Minor
>             Fix For: 0.95.1
>         Attachments: 7839.v1.patch
> A kill -9 cannot be used to simulate a dead box. With a kill -9:
> 1) the sockets are closed by the OS
> 2) the next calls will get immediately a connection refused.
> Physically unplugging the cable does work.
> To automate this, the best solution seems to be using a firewall config.
> It's a little bit complicated however, because we need to refuse the incoming packets.
If we block the out connection, it's detected by the OS and there is no wait on the socket.
> Moreover you need to be root, or use a program with a sticky bit to launch the script
that changes the firewall config.
> This will be usable from the integration tests.

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