Re: vsphere web client SDK 6.0  java.lang.NullPointerException: The URL of the VMware Component Manager cannot be empty.

I see the following error in you log file:

[2015-08-04T18:45:50.039+05:30] [INFO ] region-dm-7                   com.vmware.vise.vim.cm.impl.AfdCMSource                           Creating vm afd client at localhost

[2015-08-04T18:45:50.480+05:30] [ERROR] region-dm-7                   com.vmware.vise.vim.cm.impl.AfdCMSource                           Error when talking to afd client java.lang.ExceptionInInitializerError: null

  at com.vmware.af.VmAfClient.getCMLocation(VmAfClient.java:47)

Please make sure that your webclient.properties has the following peroperty:

afd.disabled=true