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From "Carl Steinbach (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-1686) XMLEncoder failing to serialize classes containing Enums for non-SUN JREs
Date Fri, 29 Oct 2010 22:53:22 GMT

     [ https://issues.apache.org/jira/browse/HIVE-1686?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Carl Steinbach updated HIVE-1686:
---------------------------------

    Fix Version/s:     (was: 0.5.1)

> XMLEncoder failing to serialize classes containing Enums for non-SUN JREs
> -------------------------------------------------------------------------
>
>                 Key: HIVE-1686
>                 URL: https://issues.apache.org/jira/browse/HIVE-1686
>             Project: Hive
>          Issue Type: Bug
>          Components: Serializers/Deserializers
>    Affects Versions: 0.5.0
>         Environment: SLES 10 SP2, IBM Java 1.6 SR8
>            Reporter: Stephen Watt
>            Priority: Minor
>         Attachments: HIVE-1686.patch
>
>
> If one is using Hive 0.5 with IBM Java 1.6 certain Hive Queries will fail in the Hive
CLI, such as "SELECT Count(1) from TABLE" with the error "failed to write expression: GenericUDAFEvaluator$Mode=Class.new()".
This is due to the fact that XMLEncoder in the JRE's beans.jar is not able to serialize Classes
with Enums without an explicitly having an EnumPersistenceDelegate assigned to each class
that needs to be serialized. This was an issue in SUN JDK 1.5 but not 1.6 and is still an
issue in IBM Java 1.6.

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