In my project I found the library which brings Jackson core 2.6.5 and it is used in conjunction with the requested Jackson scala module 2.5.3 wanted by spark 2.0.0 preview. At runtime it's the cause of exception.
Now I have excluded 2.6.5 using sbt but it could be dangerous for the other library. Why this regression to Jackson 2.5.3 switching from 2.0.0 snapshot to preview ? Thanks Paolo Get Outlook for Android On Fri, Jul 1, 2016 at 4:24 PM +0200, "Paolo Patierno" <ppatie...@live.com> wrote: Hi, developing a custom receiver up today I used spark version "2.0.0-SNAPSHOT" and scala version 2.11.7. With these version all tests work fine. I have just switching to "2.0.0-preview" as spark version but not I have following error : An exception or error caused a run to abort: class com.fasterxml.jackson.module.scala.ser.ScalaIteratorSerializer overrides final method withResolved.(Lcom/fasterxml/jackson/databind/BeanProperty;Lcom/fasterxml/jackson/databind/jsontype/TypeSerializer;Lcom/fasterxml/jackson/databind/JsonSerializer;)Lcom/fasterxml/jackson/databind/ser/std/AsArraySerializerBase; java.lang.VerifyError: class com.fasterxml.jackson.module.scala.ser.ScalaIteratorSerializer overrides final method withResolved.(Lcom/fasterxml/jackson/databind/BeanProperty;Lcom/fasterxml/jackson/databind/jsontype/TypeSerializer;Lcom/fasterxml/jackson/databind/JsonSerializer;)Lcom/fasterxml/jackson/databind/ser/std/AsArraySerializerBase; at java.lang.ClassLoader.defineClass1(Native Method) I see that using 2.0.0-SNAPSHOT the jackson core version is 2.6.5 ... now 2.6.1 with module scala 2.5.3. Thanks, Paolo. Paolo PatiernoSenior Software Engineer (IoT) @ Red Hat Microsoft MVP on Windows Embedded & IoTMicrosoft Azure Advisor Twitter : @ppatierno Linkedin : paolopatierno Blog : DevExperience