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https://issues.apache.org/jira/browse/HADOOP-8104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eli Collins reassigned HADOOP-8104:
-----------------------------------
Assignee: Alejandro Abdelnur (was: Colin Patrick McCabe)
> 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: Alejandro Abdelnur
> 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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