>________________________________
> From: vvkbtnkr <[email protected]>
>To: [email protected]
>Sent: Friday, January 13, 2012 1:59 PM
>Subject: Wrong version of jackson parser while running a hadoop job
>
>
>I am running a hadoop jar and keep getting this error -
>java.lang.NoSuchMethodError:
>org.codehaus.jackson.JsonParser.getValueAsLong()
>
>
>on digging deeper, this is what I can find:- my jar packages version 1.8.5
>of jackson-mapper-asl (Jackson json parser) and I can verify that by using
>"mvn dependency:resolve". I see that the proper version is being packaged
>into my jar.
>
>However, initially my jar was packaging version 1.0.1 of jackson-mapper-asl
>in the jar, thats because my jar depends on hadoop core 1.0.0 and as can be
>seen here
>
>/org/apache/hadoop/hadoop-core/1.0.0/hadoop-core-1.0.0.pom
>
>contains the following dependency section:
>
> <dependency>
> <groupId>org.codehaus.jackson</groupId>
> <artifactId>jackson-mapper-asl</artifactId>
> <version>1.0.1</version>
> </dependency>
>
>
>That is hadoop core depends on version 1.0.1 ...
>
>
>
>Given this, my current guess is that, though my jar which i run as
>
>hadoop jar myjar.jar
>
>
>contains the proper version of jackson parser, somehow during the call to
>"hadoop jar" , the wrong version , 1.0.1, of the jar is being loaded by
>hadoop. Does this make sense? I spent a lot of time verifying that the
>created jar file "myjar.jar" does indeed have proper version of jackson
>parser (i checked the size of JsonParser.class files in my jar is exactly
>the same as version 1.8.5 of jackson-mapper-asl), so something seems to be
>happening while hadoop is loading the classes, and am thinking it probably
>loads version 1.0.1 first, as hadoop core depends on it.
>
>Any one faced similar issues, any idea where to look ...
>
>--
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>
>
>
>
