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From "Konstantin Shvachko (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-430) http server should die if the Datanode fails.
Date Mon, 07 Aug 2006 22:35:13 GMT
http server should die if the Datanode fails.

                 Key: HADOOP-430
                 URL: http://issues.apache.org/jira/browse/HADOOP-430
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.5.0
            Reporter: Konstantin Shvachko
             Fix For: 0.5.1
         Attachments: RegistrationOrder.patch

HADOOP-375 changed the order in which a data node registers and starts its http server.
Current version first starts the http server, then registers. As a result if the registration
which can happen e.g. if the datanode has illegal storage id (=does not belong to the cluster),
the http server keeps running, which makes the data node seem running too.
I think 2 things need to be done.
1) Datanode registration should precede the http server startup.
2) The http server should shutdown when the datanode fails (in general).
I am attaching a patch for the first item.
Does anybody know how the latter can be done in the version of jetty we are on now?

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