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From "Alejandro Abdelnur (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8104) Inconsistent Jackson versions
Date Thu, 23 Feb 2012 01:19:48 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214161#comment-13214161
] 

Alejandro Abdelnur commented on HADOOP-8104:
--------------------------------------------

trunk POMs specify jackson 1.8.8, where are you seeing 1.7.1 being pulled?
                
> Inconsistent Jackson versions
> -----------------------------
>
>                 Key: HADOOP-8104
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8104
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>
> This is a maven build issue.
> Jersey 1.8 is pulling in version 1.7.1 of Jackson.  Meanwhile, we are manually specifying
that we want version 1.8 of Jackson in the POM files.  This causes a conflict where Jackson
produces unexpected results when serializing Map objects.
> How to reproduce: try this code:
> <code>
> ObjectMapper mapper = new ObjectMapper();
>  Map<String, Object> m = new HashMap<String, Object>();
> mapper.writeValue(new File("foo"), m);
> </code>
> You will get an exception:
> <code>
> Exception in thread "main" java.lang.NoSuchMethodError: org.codehaus.jackson.type.JavaType.isMapLikeType()Z
> at org.codehaus.jackson.map.ser.BasicSerializerFactory.buildContainerSerializer(BasicSerializerFactory.java:396)
> at org.codehaus.jackson.map.ser.BeanSerializerFactory.createSerializer(BeanSerializerFactory.java:267)
> </code>
> Basically the inconsistent versions of various Jackson components are causing this NoSuchMethod
error.
> As far as I know, this only occurs when serializing maps-- that's why it hasn't been
found and fixed yet.

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