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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6194) Add service base class and tests to hadoop-common/util
Date Tue, 27 Apr 2010 22:03:33 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated HADOOP-6194:
-----------------------------------

    Attachment: HADOOP-6194.patch

This is an updated patch which

* uses the name LifecycleService for the class, LifecycleServiceWithWorkers for the subclass
intended for services with workers.
* added much more javadocs and even some more test cases to the test

I'll stick up the HDFS services tomorrow; I will synchronise and run all the tests. The big
changes there are primarily in adding more shutdown logic to remove all threads; this could
be teased out to make the lifecycle patch look smaller. 

I have a patch for the JT and TT too; the only troublespot there is in startup, where I believe
it can block forever waiting for the filesystem to go live in startup. There's also MAPREDUCE-437.
These are separate issues from how you start and stop the things, just needed to make sure
that when you start or stop them they clean up and don't ever block waiting for some external
dependency like a functional filesystem.


> Add service base class and tests to hadoop-common/util
> ------------------------------------------------------
>
>                 Key: HADOOP-6194
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6194
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: util
>    Affects Versions: 0.21.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>             Fix For: 0.22.0
>
>         Attachments: HADOOP-6194-1.patch, HADOOP-6194.patch, HADOOP-6194.patch
>
>
> For a service base class, we need to add to common
> # The Service class
> # A mock Service class (it's not in test, its in src/, because it helps in functional
tests downstream)
> # Unit tests
> This is the issue to cover this work

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