MQTT-broker plugin raises an exception

[mcicolella]

When MQTT-broker plugin is running and you click on an object the following exception is raised

Exception in thread "freedomotic-protocol-executor" java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.introspect.AnnotatedMember.getType()Lcom/fasterxml/jackson/databind/JavaType; at com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector._fullSerializationType(JaxbAnnotationIntrospector.java:1637) at com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector._findContentAdapter(JaxbAnnotationIntrospector.java:1588) at com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector.findSerializationContentConverter(JaxbAnnotationIntrospector.java:920) at com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair.findSerializationContentConverter(AnnotationIntrospectorPair.java:388) at com.fasterxml.jackson.databind.ser.std.StdSerializer.findConvertingContentSerializer(StdSerializer.java:266) at com.fasterxml.jackson.databind.ser.std.AsArraySerializerBase.createContextual(AsArraySerializerBase.java:197) at com.fasterxml.jackson.databind.SerializerProvider.handleSecondaryContextualization(SerializerProvider.java:944) at com.fasterxml.jackson.databind.SerializerProvider.findValueSerializer(SerializerProvider.java:527) at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.resolve(BeanSerializerBase.java:317) at com.fasterxml.jackson.databind.ser.SerializerCache.addAndResolveNonTypedSerializer(SerializerCache.java:177) at com.fasterxml.jackson.databind.SerializerProvider._createAndCacheUntypedSerializer(SerializerProvider.java:1166) at com.fasterxml.jackson.databind.SerializerProvider.findValueSerializer(SerializerProvider.java:481) at com.fasterxml.jackson.databind.SerializerProvider.findTypedValueSerializer(SerializerProvider.java:679) at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:107) at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:3559) at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:2927) at com.freedomotic.plugins.devices.restapiv3.resources.atmosphere.AtmosphereObjectChangeResource.broadcast(AtmosphereObjectChangeResource.java:60) at com.freedomotic.plugins.devices.restapiv3.RestAPIv3.onEvent(RestAPIv3.java:127) at com.freedomotic.api.Protocol$ActuatorOnEventRunnable.run(Protocol.java:299) at org.apache.shiro.subject.support.SubjectRunnable.doRun(SubjectRunnable.java:120) at org.apache.shiro.subject.support.SubjectRunnable.run(SubjectRunnable.java:108) at java.lang.Thread.run(Thread.java:748)

When you remove the plugin the exception is no more present.
Maybe it is caused by a lib version conflict.

[abollaert]

It's probable that the code gets compiled against a different minor than it gets at runtime (assembly). I could have a look at it if you want.

[mcicolella]

@abollaert sure, thanks.

[Larry0ua]

Could anyone explain in short how to reproduce the issue? I've tried locally compiled version of Freedomotic with MQTT-broker plugin installed from marketplace, and did not see any exceptions while clicking on the lamps on the screen. Could the exception be caused by incompatible versions of plugin and core?

[mcicolella]

@Larry0ua have you tried with Windows? I found this problem only with Linux 64bit.

[Larry0ua]

Tried it on Windows only... So I believe my reproducing steps are correct?
Actually that's quite weird to have this issue on Linux, but not on Windows as it's a problem of class packaging and library versions incompatibility and not an environment specific thing.

[mcicolella]

I have other problems only with Linux. For example #272 .

[amenak77]

It could be windows has a more "permissive" JVM

[amenak77]

Don't know if this could be a better or worse factor, but linux probably represents a more stable test platform for java projects. Unfortunately I'm not very familiar with it, too

[amenak77]

Maybe abollaert was right. FasterXML/jackson-module-jaxb-annotations#57

[amenak77]

https://github.com/jersey/jersey/issues/3783

The exception seems to be from Jackson, where they say its due to an old version of jackson. 2.24 used version 2.5.4, 2.26 is using 2.8.4, 2.27 will use 2.8.10. as commented by jansupol