My own bundle doen't want to start, because it can't import log4j

Setup, Configuration and Use Beginners
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1

I’ve created my own binding for OpenHab2, build it with mvn clean package and uploaded it to /usr/share/openhab2/addons/.

My problem is that bundle is not starting. In logs there are this warns:

2016-11-25 10:55:00.518 [WARN ] [org.apache.felix.fileinstall ] - Error while starting bundle: file:/usr/share/openhab2/addons/org.openhab.binding.rf24-2.0.0-SNAPSHOT.jar
org.osgi.framework.BundleException: Could not resolve module: org.openhab.binding.rf24 [189]
Unresolved requirement: Import-Package: org.apache.log4j; version=“1.2.17”

    at org.eclipse.osgi.container.Module.start(Module.java:434)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
    at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:393)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(DirectoryWatcher.java:1245)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1217)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.startAllBundles(DirectoryWatcher.java:1207)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(DirectoryWatcher.java:504)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:358)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:310)[8:org.apache.felix.fileinstall:3.5.0]

2016-11-25 10:55:00.536 [WARN ] [org.apache.felix.fileinstall ] - Error while starting bundle: file:/usr/share/openhab2/addons/org.openhab.binding.rf24-2.0.0-SNAPSHOT.jar
org.osgi.framework.BundleException: Could not resolve module: org.openhab.binding.rf24 [189]
Unresolved requirement: Import-Package: org.apache.log4j; version=“1.2.17”

    at org.eclipse.osgi.container.Module.start(Module.java:434)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
    at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:393)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundle(DirectoryWatcher.java:1245)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.startBundles(DirectoryWatcher.java:1217)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.doProcess(DirectoryWatcher.java:509)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.process(DirectoryWatcher.java:358)[8:org.apache.felix.fileinstall:3.5.0]
    at org.apache.felix.fileinstall.internal.DirectoryWatcher.run(DirectoryWatcher.java:310)[8:org.apache.felix.fileinstall:3.5.0]

2016-11-25 11:00:16.306 [ERROR] [org.openhab.binding.rf24 ] - FrameworkEvent ERROR - org.openhab.binding.rf24
org.osgi.framework.BundleException: Could not resolve module: org.openhab.binding.rf24 [189]
Unresolved requirement: Import-Package: org.apache.log4j; version=“1.2.17”

    at org.eclipse.osgi.container.Module.start(Module.java:434)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]
    at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)[org.eclipse.osgi-3.10.2.v20150203-1939.jar:]

Installed on RPi3 Raspbian via http://docs.openhab.org/installation/linux.html

2

I think there should be no dependecy on log4j.

Look here: Tellstick binding for OpenHab2 - #22 by Kai

A binding should never depend on the logback implementation, but only on the org.slf4j logger interfaces.
Logback is not part of openHAB 2 anymore, this is the reason for the message above.

But the question is why genereting skeleton (via script) added this.

3

Can you provide your META-INF/MANIFEST.MF?

The entry “org.apache.log4j” should not be there if you do not provide the associated binary.