Kitchen.sh issue: Unknown error in KarafBlueprintWatcher

I installed PDI 6.0 community version. it has many small issues while I execute the kitchen.sh. Many of them I resolved. However below issue I am not able to resolve. Also it is not occurring sometimes. So not sure how to fix this. Good thing is, it is not stopping the job executiong however it is increasing the job execution time while waiting for some blue print.: 06:32:55,241 ERROR [KarafLifecycleListener] Error in Blueprint Watcher
org.pentaho.osgi.api.IKarafBlueprintWatcher$BlueprintWatcherException: Unknown error in KarafBlueprintWatcher
at org.pentaho.osgi.impl.KarafBlueprintWatcherImpl.waitForBlueprint(KarafBlueprintWatcherImpl.java:89)
at org.pentaho.di.osgi.KarafLifecycleListener$2.run(KarafLifecycleListener.java:112)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.pentaho.osgi.api.IKarafBlueprintWatcher$BlueprintWatcherException: Timed out waiting for blueprints to load: pentaho-big-data-api-hdfs,pentaho-big-data-impl-vfs-hdfs,pentaho-big-data-impl-clusterTests
at org.pentaho.osgi.impl.KarafBlueprintWatcherImpl.waitForBlueprint(KarafBlueprintWatcherImpl.java:77)
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