I'm parsing a XML string to convert it to a JsonNode in Scala using a XmlMapper from the Jackson library. I code on a Databricks notebook, so compilation is done on a cloud cluster. When compiling my code I got this error java.lang.NoSuchMethodError: com.fasterxml.jackson.dataformat.xml.XmlMapper.coercionConfigDefaults()Lcom/fasterxml/jackson/databind/cfg/MutableCoercionConfig; with a hundred lines of "at com.databricks. ..."
I maybe forget to import something but for me this is ok (tell me if I'm wrong) :
import ch.qos.logback.classic._
import com.typesafe.scalalogging._
import com.fasterxml.jackson._
import com.fasterxml.jackson.core._
import com.fasterxml.jackson.databind.{ObjectMapper, JsonNode}
import com.fasterxml.jackson.dataformat.xml._
import com.fasterxml.jackson.module.scala._
import com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper
import java.io._
import java.time.Instant
import java.util.concurrent.TimeUnit
import javax.xml.parsers._
import okhttp3.{Headers, OkHttpClient, Request, Response, RequestBody, FormBody}
import okhttp3.OkHttpClient.Builder._
import org.apache.spark._
import org.xml.sax._
As I'm using Databricks, there's no SBT file for dependencies. Instead I installed the libs I need directly on the cluster. Here are the ones I'm using :
com.squareup.okhttp:okhttp:2.7.5
com.squareup.okhttp3:okhttp:4.9.0
com.squareup.okhttp3:okhttp:3.14.9
org.scala-lang.modules:scala-swing_3:3.0.0
ch.qos.logback:logback-classic:1.2.6
com.typesafe:scalalogging-slf4j_2.10:1.1.0
cc.spray.json:spray-json_2.9.1:1.0.1
com.fasterxml.jackson.module:jackson-module-scala_3:2.13.0
javax.xml.parsers:jaxp-api:1.4.5
org.xml.sax:2.0.1
The code causing the error is simply (coming from here : https://www.baeldung.com/jackson-convert-xml-json Chapter 5):
val xmlMapper: XmlMapper = new XmlMapper()
val jsonNode: JsonNode = xmlMapper.readTree(responseBody.getBytes())
with responseBody being a String containing a XML document (I previously checked the integrity of the XML). When removing those two lines the code is working fine.
I've read tons of articles or forums but I can't figure out what's causing my issue. Can someone please help me ? Thanks a lot ! :)
Welcome to dependency hell and breaking changes in libraries.
This usually happens, when various lib bring in different version of same lib. In this case it is Jackson.
java.lang.NoSuchMethodError: com.fasterxml.jackson.dataformat.xml.XmlMapper.coercionConfigDefaults()Lcom/fasterxml/jackson/databind/cfg/MutableCoercionConfig; means: One lib probably require Jackson version, which has this method, but on class path is version, which does not yet have this funcion or got removed bcs was deprecated or renamed.
In case like this is good to print dependency tree and check version of Jackson required in libs. And if possible use newer versions of requid libs.
Solution: use libs, which use compatible versions of Jackson lib. No other shortcut possible.