Bundle dependency could not be resolved due to missing constraint on import package, How to add jar dependency in a an osgi bundle using maven?

Question

I am new to maven.

I am trying to import a jar dependency (com.jcraft.jsch) in my opendaylight controller project. The code compiles successfully. But when the controller is run, it throws the following errors.

!ENTRY org.opendaylight.controller.samples.ssr 4 0 2013-10-11 10:25:14.624 !MESSAGE FrameworkEvent ERROR !STACK 0 org.osgi.framework.BundleException: The bundle "org.opendaylight.controller.samples.ssr_0.4.0.SNAPSHOT [36]" could not be resolved. Reason: Missing Constraint: Import-Package: com.jcraft.jsch; version="0.0.0" at org.eclipse.osgi.framework.internal.core.AbstractBundle.getResolverError(AbstractBundle.java:1332) at org.eclipse.osgi.framework.internal.core.AbstractBundle.getResolutionFailureException(AbstractBundle.java:1316) at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:323) at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390) at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176) at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559) at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544) at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457) at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243) at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438) at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1) at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340) 2013-10-11 10:25:14.627 IST [org.opendaylight.controller.logging.bridge.internal.LogListenerImpl@190c63b2] ERROR o.o.c.logging.bridge.OSGI2SLF4J - Bundle:org.opendaylight.controller.samples.ssr Message:FrameworkEvent ERROR Exception:org.osgi.framework.BundleException: The bundle "org.opendaylight.controller.samples.ssr_0.4.0.SNAPSHOT [36]" could not be resolved. Reason: Missing Constraint: Import-Package: com.jcraft.jsch; version="0.0.0"

I have imported that package. The package org.opendaylight.controller.samples.ssr is added by me in it. Basically, I have modified one of the packages in samples. The problem is I am trying to import one jar dependency com.jcraft.jsch in one of the classes in this package. But there is a problem with importing this jar.

I have been slogging after this issue for last couple of weeks. Any suggestions or solutions please. Thanks in advance.

Package org.opendaylight.controller.samples.ssr is not available in any bundle or if it is available, it is not exported. — Balazs Zsoldos
Thanks you :) Can you please look at it again? I have modified this query a little bit.. — user793735
Can you telnet onto the equinox system? If yes, what does the command "packages com.jcraft.jsch" say? I think it is not in the OSGi container. If it is there, I will be surprised. It might be in one of your jars but are you sure it is listed in the Export-Package Manifest header? If it is in that jar and the package is listed, is that bundle in ACTIVE state (ss command in the console)? — Balazs Zsoldos

sharmadhrv sharmadhrv · Accepted Answer · 2013-11-13T07:24:25

I was facing the same issue in OpenDaylight. Here's a solution that I figured out after some trial and error (Let me know if you find any step to be unnecessary):

The Maven dependency in your case would have, Group Id as com.jcraft, Artifact Id as jsch, Version as 0.1.31 (say) and Imported Package ias com.jcraft.jsch. Also, your OpenDaylight module is org.opendaylight.controller.samples.ssr.

In the file distribution/opendaylight/opendaylight-osgi-launcher.launch and distribution/opendaylight/opendaylight-osgi-launcher-local.launch, add your dependency and the module to the following tags:

...
<stringAttribute key="target_bundles" value="com.jcraft.jsch@default:default,ch.qos.logback.classic@default:default, ch.qos.logback.core@default:default ..."/>
.
.
<stringAttribute key="workspace_bundles" value="org.opendaylight.controller.samples.ssr@default:default,org.opendaylight.controller.arphandler@default:default, ..."/>
...

In file distribution/opendaylight/opendaylight.target, add a unit entry as,

...
<unit id="com.google.gson" version="2.1.0"/>
<unit id="com.jcraft.jsch" version="0.1.31"/>
...

In distribution/p2site/pom.xml, add the artifact entry as,

...
<artifact>
  <id>com.google.code.gson:gson:2.1</id>
  <transitive>false</transitive>
  <override>false</override>
</artifact>
<artifact>
  <id>com.jcraft:jsch:0.1.31</id>
  <transitive>false</transitive>
  <override>false</override>
</artifact>
...

In commons/opendaylight/pom.xml, add the dependency entry as,

...
<dependency>
  <groupId>com.google.code.gson</groupId>
  <artifactId>gson</artifactId>
  <version>2.1</version>
  <scope>compile</scope>
</dependency>
<dependency>
  <groupId>com.jcraft</groupId>
  <artifactId>jsch</artifactId>
  <version>0.1.31</version>
</dependency>
...

Do a complete OpenDaylight maven build and run. It should work fine. In case, this dependency has further chained dependencies you might get the error again. Import those dependencies the same way.

Bundle dependency could not be resolved due to missing constraint on import package, How to add jar dependency in a an osgi bundle using maven?

1 Answers