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Date: Thu, 30 Oct 2008 00:28:44 -0700 (PDT)
From: "Aaron Kimball (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Resolved: (HADOOP-4141) ScriptBasedMapping has infinite loop
 with invalid jobconf parameter
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     [ https://issues.apache.org/jira/browse/HADOOP-4141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aaron Kimball resolved HADOOP-4141.
-----------------------------------

    Resolution: Fixed

> ScriptBasedMapping has infinite loop with invalid jobconf parameter
> -------------------------------------------------------------------
>
>                 Key: HADOOP-4141
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4141
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.18.0
>            Reporter: Aaron Kimball
>            Priority: Minor
>         Attachments: HADOOP-4141.patch.3, scriptMap.patch, scriptMap.patch.2, TestScriptBasedMapping.java
>
>   Original Estimate: 0h
>  Remaining Estimate: 0h
>
> A few bugs in ScriptBasedTopology:
> 1) topology.script.number.args is not validated; if this is <= 0, the runResolveCommand() method will run its outer loop an infinite number of times. 
> 2) CachedDNSToSwitchMapping assumes that if a List is returned, it has the same cardinality as the number of names. ScriptBasedMapping should return 'null' instead of a mis-sized list on error

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