JasperReports Jackson dependency conflict

Question

I am using JasperReports 6.3.1 with a Dropwizard 1.0.5 project and it seems to have a conflict with Jackson when desalinizing my JSON response.

I am getting:

Stacktrace:
    at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:575)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:462)
....
Caused by: org.apache.jasper.JasperException

and

Stacktrace:
    at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:575)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:477)
...
Caused by: org.apache.jasper.el.JspELException
...
Caused by: java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.ObjectReader.getConfig()Lcom/fasterxml/jackson/databind/DeserializationConfig;

I tried excluding jackson-core from my Maven dependency but it won't do the trick. As I see, Jasper uses 2.1.4 and Dropwizard uses 2.7.8

<dependency>
      <groupId>net.sf.jasperreports</groupId>
      <artifactId>jasperreports</artifactId>
      <version>6.3.1</version>
      <exclusions>
        <exclusion>
          <artifactId>jackson-core-asl</artifactId>
          <groupId>org.codehaus.jackson</groupId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>

Answer 1

I solved my problem. The issue was that as I was using a Dropwizard application (v 1.0.5), which was coming with jackson 2.7.8.

JasperReports is also using jackson, but it uses 2.1.4.

When deserializing the JSON objects, it was using JasperReports's library (v 2.1.4) which didn't have all the needed functions.

I solved this by adding the jackson library (core and annotations) in my pom.xml.

         <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.7.8</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.7.8</version>
        </dependency>