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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5454) SortedMapWritable: readFields() will not clear values before deserialization
Date Mon, 03 Aug 2009 12:54:15 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tom White updated HADOOP-5454:
------------------------------

    Affects Version/s: 0.19.1
        Fix Version/s:     (was: 0.19.2)

> SortedMapWritable: readFields() will not clear values before deserialization
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-5454
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5454
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.19.1
>            Reporter: Stefan Podkowinski
>
> In case SortedMapWritable is used as value in a reducer, the user must explicitly call
clear() on the map between iterating values. This is because SortedMapWritable will be reused
once instantiated, but consecutive calls to readFields() will not reset the maps internal
state, as e.g. done by MapWritable. Please add this.instance.clear(); on top of readFields().
> You may also want to consider HADOOP-5028 for fixing another issue with this class.

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