Jackson Afterburner module is failing inside Apache Karaf 3.0.5 - jackson

Question

I have a simple Hello World type Karaf Bundle running inside Apache ServiceMix 6.1.0 using Jackson's Afterburner Module. The activator code looks like below:-
public class HelloWorldActivator implements BundleActivator {
#Override
public void start(BundleContext bundleContext) throws Exception {
System.out.println("STARTING DEMO: hello, world\n");
System.out.println(getJsonDataAsString());
}
#Override
public void stop(BundleContext bundleContext) throws Exception {
System.out.println("STOPPING DEMO");
}
private String getJsonDataAsString() {
JsonDataBlob jsonDataBlob = new JsonDataBlob();
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(new AfterburnerModule());
try {
return objectMapper.writeValueAsString(jsonDataBlob);
} catch(Exception e) {
e.printStackTrace();
}
return "";
}
}
The pom.xml looks like below:-
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.hello</groupId>
<artifactId>world</artifactId>
<version>0.0.1</version>
<packaging>bundle</packaging>
<name>Hello World</name>
<dependencies>
<!-- OSGi -->
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.core</artifactId>
<version>4.3.1</version>
</dependency>
<dependency>
<groupId>org.osgi</groupId>
<artifactId>org.osgi.compendium</artifactId>
<version>4.3.1</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20160212</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-afterburner</artifactId>
<version>2.7.1</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<excludes>
<exclude>**/com/hello/main/*</exclude>
</excludes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>2.4.0</version>
<inherited>true</inherited>
<extensions>true</extensions>
<configuration>
<instructions>
<Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
<Bundle-Version>${project.version}</Bundle-Version>
<Bundle-Activator>com.hello.world.HelloWorldActivator</Bundle-Activator>
<Import-Package>*;resolution:=optional</Import-Package>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
</project>
The java object which I am trying to convert to json is a simple object as shown below:-
package com.hello.world;
public class JsonDataBlob {
private String add1 = "JP Naagar";
private String add2 = "";
private int shippartagent = 1;
public String getAdd1() {
return add1;
}
public void setAdd1(String add1) {
this.add1 = add1;
}
public String getAdd2() {
return add2;
}
public void setAdd2(String add2) {
this.add2 = add2;
}
public int getShippartagent() {
return shippartagent;
}
public void setShippartagent(int shippartagent) {
this.shippartagent = shippartagent;
}
}
But whenever I am trying to install the bundle I am getting the below exception and the bundle gets stuck in the Resolved state:-
2016-05-07 15:36:48,986 | WARN | x-6.1-2.0/deploy | fileinstall | 7 - org.apache.felix.fileinstall - 3.5.0 | Error while starting bundle: file:/Users/debraj/Downloads/apache-servicemix-6.1-2.0/deploy/world-0.0.1.jar
org.osgi.framework.BundleException: Activator start error in bundle world [239].
at org.apache.felix.framework.Felix.activateBundle(Felix.java:2196)[org.apache.felix.framework-4.2.1.jar:]
at org.apache.felix.framework.Felix.startBundle(Felix.java:2064)[org.apache.felix.framework-4.2.1.jar:]
at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:955)[org.apache.felix.framework-4.2.1.jar:]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(DirectoryWatcher.java:1245)[7:org.apache.felix.fileinstall:3.5.0]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1217)[7:org.apache.felix.fileinstall:3.5.0]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(DirectoryWatcher.java:509)[7:org.apache.felix.fileinstall:3.5.0]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:358)[7:org.apache.felix.fileinstall:3.5.0]
at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:310)[7:org.apache.felix.fileinstall:3.5.0]
Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/module/afterburner/AfterburnerModule
at java.lang.Class.getDeclaredConstructors0(Native Method)[:1.8.0_77]
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)[:1.8.0_77]
at java.lang.Class.getConstructor0(Class.java:3075)[:1.8.0_77]
at java.lang.Class.newInstance(Class.java:412)[:1.8.0_77]
at org.apache.felix.framework.Felix.createBundleActivator(Felix.java:4336)
at org.apache.felix.framework.Felix.activateBundle(Felix.java:2141)
... 7 more
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.module.afterburner.AfterburnerModule not found by world [239]
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1532)[org.apache.felix.framework-4.2.1.jar:]
at org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)[org.apache.felix.framework-4.2.1.jar:]
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1955)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)[:1.8.0_77]
... 13 more
All the required Jackson bundles are installed in Karaf:-
karaf#root>bundle:list | grep Jackson
123 | Active | 50 | 2.6.2 | Jackson-core
125 | Active | 50 | 2.6.2 | Jackson-annotations
238 | Installed | 80 | 2.7.1 | Jackson-module-Afterburner
karaf#root>bundle:list | grep jackson
124 | Active | 50 | 2.6.2 | jackson-databind
Everything works fine if I comment out the below line:-
objectMapper.registerModule(new AfterburnerModule());
Can some one let me know what I am doing wrong?
All the code I have placed in the github.

Answer 1

You already asked this at the karaf mailing list.
It's still the same thing, as long as the package isn't imported in your own application it won't work.
Since you do an import for *;optional=true you won't get a wiring exception as your imports are all optional. Therefore the ClassNotFound Exeception.
First of all check the headers for the right imports with
bundle:header [bundle-id]
second, since you are doing an * import it might happen as you don't explicitly ask for a certain class in a certain package that some packages aren't imported.
And a sub-package import doesn't help on the package, so if you have an import for
com.fasterxml.jackson.module.afterburner.subPackage
this won't help on resolving classes in
com.fasterxml.jackson.module.afterburner
So it's actually best to declare all imports and use the * only on sub-packages.
In your case add the following to your pom:
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>2.4.0</version>
<inherited>true</inherited>
<extensions>true</extensions>
<configuration>
<instructions>
<Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
<Bundle-Version>${project.version}</Bundle-Version>
<Bundle-Activator>com.hello.world.HelloWorldActivator</Bundle-Activator>
<Import-Package>
com.fasterxml.jackson.module.afterburner.*,
*;resolution:=optional
</Import-Package>
</instructions>
</configuration>
</plugin>

Answer 2

Along with upgrading to Jackson 2.7.4. Modifying my Import-Package in pom.xml as shown below solved the issue:-
<Import-Package>com.fasterxml.jackson.module.afterburner.ser;resolution:=optional,*</Import-Package>