"Bundle cannot be generated" WARN message at org.ops4j.pax.swissbox.bnd.BndUtils (without additional information) [PAXURL-214]

[ops4j-issues]

Hendy Irawan created PAXURL-214

Log:

2013-03-06 07:00:08,579 | INFO  | rint Extender: 3 | OverridingSupplier               | luvas.commons.OverridingSupplier   80 | 239 - org.soluvas.commons - 2.0.0.SNAPSHOT | Initializing overriding supplier for WebAddress with 0 suppliers
2013-03-06 07:00:08,584 | DEBUG | rint Extender: 1 | json                             | ?                                   ? | 243 - org.soluvas.json - 2.0.0.SNAPSHOT | ServiceEvent REGISTERED - [com.google.common.base.Supplier, java.io.Serializable] - org.soluvas.json
2013-03-06 07:00:08,587 | INFO  | xFrameworkWiring | BlueprintExtender                | nt.container.BlueprintExtender$3  282 | 7 - org.apache.aries.blueprint.core - 1.1.0 | Destroying BlueprintContainer for bundle wicket_dev.xml
2013-03-06 07:00:08,595 | WARN  | Thread-59        | BndUtils                         | ps4j.pax.swissbox.bnd.BndUtils$1  178 | 2 - org.ops4j.pax.url.wrap - 1.3.5 | Bundle cannot be generated
2013-03-06 07:00:08,600 | WARN  | Thread-60        | BndUtils                         | ps4j.pax.swissbox.bnd.BndUtils$1  178 | 2 - org.ops4j.pax.url.wrap - 1.3.5 | Bundle cannot be generated
2013-03-06 07:00:08,897 | WARN  | Thread-62        | BndUtils                         | ps4j.pax.swissbox.bnd.BndUtils$1  178 | 2 - org.ops4j.pax.url.wrap - 1.3.5 | Bundle cannot be generated
2013-03-06 07:00:08,903 | WARN  | Thread-64        | BndUtils                         | ps4j.pax.swissbox.bnd.BndUtils$1  178 | 2 - org.ops4j.pax.url.wrap - 1.3.5 | Bundle cannot be generated

More descriptive information would be helpful.

Karaf also shows "ERROR: ''" messages (sometimes ERROR: '-1') as follows: (I'm not sure if it's related)

rudi@rudi ~/git/bippo-commerce5 $ kill -9 %1; fg; karaf_berbatik/bin/karaf
karaf_berbatik/bin/karaf
Killed
karaf: Ignoring predefined value for KARAF_HOME
        __ __                  ____      
       / //_/____ __________ _/ __/      
      / ,<  / __ `/ ___/ __ `/ /_        
     / /| |/ /_/ / /  / /_/ / __/        
    /_/ |_|\__,_/_/   \__,_/_/         

  Apache Karaf (2.3.1)

Hit '<tab>' for a list of available commands
and '[cmd] --help' for help on a specific command.
Hit '<ctrl-d>' or type 'osgi:shutdown' or 'logout' to shutdown Karaf.

karaf@root> ERROR:  ''
ERROR:  ''
ERROR:  ''
ERROR:  ''
ERROR:  ''
ERROR:  ''

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Affects: 1.3.5
Votes: 2, Watches: 2