Resolution:
Propagator jobs may fail with an exception (shown below) when Direct Data Transfer (DDT) is turned off.

Propagator jobs don't work with DDT turned off on the Driver and Engines. This is because Engines need to transfer data to each other, and can't without Direct Data Transfer.

03/12/2003 13:10:53:512 Error: ClientDataTransferPlugin bad URL
java.net.MalformedURLException: no protocol: null/dataTransfer/
at java.net.URL.&ltinit>(URL.java:579)
at java.net.URL.&ltinit>(URL.java:476)
at java.net.URL.&ltinit>(URL.java:425)
at com.livecluster.core.plugin.DataTransferPlugin._getBaseUrl(DataTransferPlugin.java:289)
at com.livecluster.core.propagator.RemoteDataRefFactory.&ltclinit>(RemoteDataRefFactory.java:108)
at com.livecluster.core.propagator.GroupCommunicatorImp.sendMessage(GroupCommunicatorImp.java:83)
at com.livecluster.core.propagator.GroupCommunicatorImp.sendMessage(GroupCommunicatorImp.java:65)
at com.livecluster.testharness.propagator.Test.treeTest(Test.java:63)
at com.livecluster.testharness.propagator.Test.main(Test.java:22)

Could not connect to the server java.lang.NullPointerException com.livecluster.tasklet.LiveClusterException: Invalid baseUrl at com.livecluster.core.propagator.RemoteDataRefFactory.create(RemoteDataRefFactory.java:17) at com.livecluster.core.propagator.GroupCommunicatorImp.sendMessage(GroupCommunicatorImp.java:83) at com.livecluster.core.propagator.GroupCommunicatorImp.sendMessage(GroupCommunicatorImp.java:65) at com.livecluster.testharness.propagator.Test.treeTest(Test.java:63) at com.livecluster.testharness.propagator.Test.main(Test.java:22)