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From "Enis Soztutar (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8104) Inconsistent Jackson versions
Date Fri, 24 Feb 2012 03:03:51 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215333#comment-13215333
] 

Enis Soztutar commented on HADOOP-8104:
---------------------------------------

I think we can go with the Alejandro's version of the patch which adds remaining jackson artifacts,
but we should also exclude jackson dependency from jersey. Maven is said to be undeterministic
about conflicting versions. 
                
> 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
>         Attachments: HADOOP-7470.patch, HADOOP-8104.patch, dependency-tree-old.txt
>
>
> 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:
> {quote}
> ObjectMapper mapper = new ObjectMapper();
>  Map<String, Object> m = new HashMap<String, Object>();
> mapper.writeValue(new File("foo"), m);
> {quote}
> You will get an exception:
> {quote}
> 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)
> {quote}
> 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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