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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2404) HADOOP-2185 breaks compatibility with hadoop-0.15.0
Date Thu, 27 Dec 2007 09:02:43 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Devaraj Das updated HADOOP-2404:

    Status: Open  (was: Patch Available)

There is one problem that HADOOP-2185 introduced (without knowledge I am sure) in the tasktracker's
reinitialization (after the jobtracker declares the tasktracker as lost, and upon the next
connection to the jobtracker, the tasktracker is asked to reinitialize). Post HADOOP-2185,
the tasktracker's initialize method sets "mapred.task.tracker.report.bindAddress" to the listener
address. This would be in the format _/<name>:<port>_ (due to the way InetAddress.toString()
is implemented). Now if the tasktracker were lost and were to reinitialize, it would call
the initialize method again, and this time the call to createSocketAddress would fail because
of the leading slash in the argument, and the tasktracker would not be able to recover from
this. So maybe, we should do a check for '/' in the tasktracker initialization before passing
it to createSocketAddress? Not sure whether such problems exist elsewhere in the framework
code too ....
Pre-HADOOP-2185, the "mapred.task.tracker.report.bindAddress" would not be reset to the listener
address, and, hence the above problem is not there..

This issue needs a resolution (and hence I am cancelling the patch).

> HADOOP-2185 breaks compatibility with hadoop-0.15.0
> ---------------------------------------------------
>                 Key: HADOOP-2404
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2404
>             Project: Hadoop
>          Issue Type: Bug
>          Components: conf
>    Affects Versions: 0.16.0
>            Reporter: Arun C Murthy
>            Assignee: Konstantin Shvachko
>            Priority: Blocker
>             Fix For: 0.16.0
>         Attachments: ConfigConvert.patch, ConfigurationConverter.patch
> HADOOP-2185 removed the following configuration parameters:
> {noformat}
> dfs.secondary.info.port
> dfs.datanode.port
> dfs.info.port
> mapred.job.tracker.info.port
> tasktracker.http.port
> {noformat}
> and changed the following configuration parameters:
> {noformat}
> dfs.secondary.info.bindAddress
> dfs.datanode.bindAddress
> dfs.info.bindAddress
> mapred.job.tracker.info.bindAddress
> mapred.task.tracker.report.bindAddress
> tasktracker.http.bindAddress
> {noformat}
> without a backward-compatibility story.
> Lots are applications/cluster-configurations are prone to fail hence, we need a way to
keep things working as-is for 0.16.0 and remove them for 0.17.0.

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