Jackson 2.8+ conflict

[kaplanke]

Description:
Embedded Jackson classes causes problems if the target project has jackson core 2.8 or above. The error message is;

java.lang.NoSuchMethodError: com.fasterxml.jackson.core.JsonGenerator.writeStartObject(Ljava/lang/Object;)V
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:151) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.fasterxml.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:2655) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.fasterxml.jackson.core.base.GeneratorBase.writeObject(GeneratorBase.java:355) ~[siddhi-map-json-5.0.4.jar:na]
	at com.fasterxml.jackson.core.JsonGenerator.writeObjectField(JsonGenerator.java:1442) ~[siddhi-map-json-5.0.4.jar:na]
	at com.netflix.discovery.converters.EurekaJacksonCodec$InstanceInfoSerializer.serialize(EurekaJacksonCodec.java:371) ~[eureka-client-1.9.8.jar:1.9.8]
	at com.netflix.discovery.converters.EurekaJacksonCodec$InstanceInfoSerializer.serialize(EurekaJacksonCodec.java:327) ~[eureka-client-1.9.8.jar:1.9.8]
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:468) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:397) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1392) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.fasterxml.jackson.databind.ObjectWriter._configAndWriteValue(ObjectWriter.java:1120) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:950) ~[jackson-databind-2.9.8.jar:2.9.8]
	at com.netflix.discovery.converters.EurekaJacksonCodec.writeTo(EurekaJacksonCodec.java:221) ~[eureka-client-1.9.8.jar:1.9.8]
	... truncated

Suggested Labels:
jackson conflict

Affected Product Version:
Tested in 5.0.0 and 5.0.4

OS, DB, other environment details and versions:
Windows, Linux

Steps to reproduce:
A spring boot application with @EnableDiscoveryClient annotation which tries to register an Eureka Dİscovery server

Workaround
If there is no standalone packaging for this library, add two java classes and annotation definitons to the target project. (Btw, The same issue also exists in avro mapper).

[suhothayan]

@kaplanke can you help us by proving a test code to reproduce this issue, then we will be able to do the modifications quite fast and release a version for you.

[kaplanke]

Hi,

You can find a sample project at the following repo;
https://github.com/kaplanke/siddhidiscoverytest

The thing is, if your siddhi json mapping dependency comes before the eureka client or any other jackson containing dependency, the conflict occurs.

To run the example please first run the eureka server, (ignore the initial discovery errors, it will connect to itself soon) then run the test.

Regards,
Kemal

[mohanvive]

We have released the siddhi-map-json version 5.0.5, please use it.