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From "nkeywal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7839) Add a script to simulate a dead machine during the integration tests
Date Wed, 13 Feb 2013 16:18:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13577678#comment-13577678
] 

nkeywal commented on HBASE-7839:
--------------------------------

There is likely what I need, as I see some iptable stuff :-).

What I have is much smaller, but does nothing else than change the iptable rule and wrap this.

The final goal is to be able to call it from java (I'm going to create another jira for this,
including start / stop hdfs & hbase). 

So whatever works it ok for me. I attach what I have today.

                
> 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: 0.96.0
>            Reporter: nkeywal
>            Assignee: nkeywal
>            Priority: Minor
>             Fix For: 0.96.0
>
>
> 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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