eclipse error : Jobs should be canceled by the plugin that scheduled them during shutdown

!MESSAGE Job found still running after platform shutdown.  Jobs should be canceled by the plugin that scheduled them during shutdown: org.eclipse.epp.internal.mpc.ui.wizards.MarketplaceDropAdapter$1

Step 1:

go to

.metadata/.plugins/org.eclipse.e4.workbench

Step 2:

Delete

workbench.xmi