Jackson ObjectMapper() constructor throws NoSuchMethod

Question

I\'m using Jackson sample code to deserialize a POJO:

ObjectMapper m = new ObjectMapper();

This line throws a NoSuchMethodError:

Answer 1

The trick here is to exclude jackson from the dependencies that use it.

To check which dependencies import it, you can use the following maven command:

mvn dependency:tree -Dincludes=org.codehaus.jackson

Answer 2

In my case it was due to yammer-metrics library including an older version of jackson.

<dependency>
  <groupId>com.yammer.metrics</groupId>
  <artifactId>metrics-servlet</artifactId>
  <version>2.1.2</version>
    <exclusions>
        <exclusion>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
        </exclusion>
    </exclusions>
</dependency>

Answer 3

I had this same problem. The core jar was 1.7.1 while the mapper was 1.8.1. Note: To fix this for maven I added an exclusion and pulled down the proper version.

        <exclusions>
            <exclusion>
                <groupId>org.codehaus.jackson</groupId>
                <artifactId>jackson-mapper-asl</artifactId>
            </exclusion>
        </exclusions>