Karaf / Maven - Unable to resolve: missing requirement osgi.wiring.package

Question

I am unable to start a bundle in Karaf (version 3.0.1).

The bundle is built using maven and it imports gson.

I included gson in maven as required:

<dependency>      <groupId>com.google.code.gson</groupId>      <artifactId>gson</artifactId>      <version>2.3.1</version> </dependency> 

The build goes fine. However, when deploying the bundle I receive this Warning from Karaf:

2015-05-27 12:45:07,371 | WARN  | 49-19-bin/deploy | fileinstall                      | 11 - org.apache.felix.fileinstall - 3.2.8 | Error while starting bundle: file:/Users/user/Documents/tools/MyBundle-1.0.0-SNAPSHOT.jar org.osgi.framework.BundleException: Unresolved constraint in bundle MyBundle [121]: Unable to resolve 121.13: missing requirement [121.13] osgi.wiring.package; (&(osgi.wiring.package=com.google.gson)(version>=2.3.0)(!(version>=3.0.0))) at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:3974)[org.apache.felix.framework-4.2.1.jar:] at org.apache.felix.framework.Felix.startBundle(Felix.java:2037)[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:1263)[11:org.apache.felix.fileinstall:3.2.8] at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1235)[11:org.apache.felix.fileinstall:3.2.8] at org.apache.felix.fileinstall.internal.DirectoryWatcher.startAllBundles(DirectoryWatcher.java:1224)[11:org.apache.felix.fileinstall:3.2.8] at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:519)[11:org.apache.felix.fileinstall:3.2.8] at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:308)[11:org.apache.felix.fileinstall:3.2.8] 

The bundle is not installed.

The Import-Package in the MANIFEST.MF begins with:

Import-Package: com.google.gson;version="[2.3,3)" 

I tried to change it with:

Import-Package: com.google.code.gson;version="[2.3,3)" 

But it gives me a similar error:

missing requirement [121.13] osgi.wiring.package; (&(osgi.wiring.package=com.google.code.gson) 

The pom.xml:

<?xml version="1.0" encoding="UTF-8"?> <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>  <parent>     <groupId>groupid</groupId>     <artifactId>artifactid</artifactId>     <version>0.0.1-SNAPSHOT</version> </parent>  <groupId>groupid</groupId> <artifactId>MyBundle</artifactId> <version>1.0.0-SNAPSHOT</version>  <packaging>bundle</packaging>  <name>MyBundle</name> <description>MyBundle</description>  <properties>     <skipTests>true</skipTests> </properties>  <dependencies>     ...     <dependency>         <groupId>org.apache.felix</groupId>         <artifactId>org.apache.felix.http.jetty</artifactId>     </dependency>     <dependency>         <groupId>org.json</groupId>         <artifactId>com.springsource.org.json</artifactId>     </dependency>     <dependency>         <groupId>org.apache.servicemix.bundles</groupId>         <artifactId>org.apache.servicemix.bundles.commons-httpclient</artifactId>         <scope>test</scope>     </dependency>     <dependency>         <groupId>org.postgresql</groupId>         <artifactId>postgresql</artifactId>         <version>9.4-1201-jdbc41</version>     </dependency>     <dependency>         <groupId>com.google.code.gson</groupId>         <artifactId>gson</artifactId>         <version>2.3.1</version>     </dependency>     <dependency>         <groupId>commons-codec</groupId>         <artifactId>commons-codec</artifactId>         <version>1.10</version>     </dependency> </dependencies>  <build>     <plugins>         <plugin>             <groupId>org.apache.felix</groupId>             <artifactId>maven-bundle-plugin</artifactId>             <extensions>true</extensions>             <configuration>                 <instructions>                     <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>                 </instructions>             </configuration>         </plugin>           <plugin>             <groupId>org.apache.maven.plugins</groupId>             <artifactId>maven-surefire-plugin</artifactId>             <configuration>                   <skipTests>${skipTests}</skipTests>             </configuration>           </plugin>     </plugins> </build>  </project> 

The MANIFEST.MF of Google GSON (the version maven downloads when I build the bundle) is:

Manifest-Version: 1.0 Export-Package: com.google.gson;version=2.3.1, com.google.gson.annotat  ions;version=2.3.1, com.google.gson.reflect;version=2.3.1, com.google  .gson.stream;version=2.3.1, com.google.gson.internal;version=2.3.1, c  om.google.gson.internal.bind;version=2.3.1 Bundle-ClassPath: . Built-By: inder Bundle-Name: Gson Created-By: Apache Maven 3.2.1 Bundle-RequiredExecutionEnvironment: J2SE-1.5, JavaSE-1.6, JavaSE-1.7,   JavaSE-1.8 Bundle-Vendor: Google Gson Project Bundle-ContactAddress: http://code.google.com/p/google-gson/ Build-Jdk: 1.6.0_65 Bundle-Version: 2.3.1 Bundle-ManifestVersion: 2 Bundle-Description: Google Gson library Bundle-SymbolicName: com.google.gson Archiver-Version: Plexus Archiver 

I also tried with

<build>     <plugins>         <plugin>             <groupId>org.apache.felix</groupId>             <artifactId>maven-bundle-plugin</artifactId>             <extensions>true</extensions>             <configuration>                 <instructions>                     <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>                     <Import-Package>*;resolution:=optional</Import-Package>                     <Embed-Dependency>*</Embed-Dependency>                     <Embed-Transitive>true</Embed-Transitive>                 </instructions>             </configuration>         </plugin>           <plugin>             <groupId>org.apache.maven.plugins</groupId>             <artifactId>maven-surefire-plugin</artifactId>             <configuration>                 <skipTests>${skipTests}</skipTests>             </configuration>           </plugin>     </plugins> </build> 

Now the dependencies are embedded but Karaf cannot start the bundle.

Answer 1

I believe you have two options here.

If you have Import-Package: com.google.gson;version="[2.3,3)" in your MANIFEST.MF, this means that you want some package to be imported from a deployed bundle, not from an embedded jar. In this case, you should first deploy gson-2.3.1.jar bundle (copy this file to the deploy folder), and then deploy your bundle.

If you want to embed the gson library as a simple non-OSGi jar dependency, this also can be done, but then you have to exclude its packages from Import-Package:

    <plugin>         <groupId>org.apache.felix</groupId>         <artifactId>maven-bundle-plugin</artifactId>         <extensions>true</extensions>         <configuration>             <instructions>                 <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>                 <Import-Package>!com.google.gson,*</Import-Package>                 <Embed-Dependency>gson</Embed-Dependency>             </instructions>         </configuration>     </plugin>