Check if there is no nexus running. If not, delete
checkState() is Static convenience methods that help a method or constructor check whether it was invoked correctly (whether its preconditions have been met). This occurs when the precondition does not met.
java.lang.IllegalStateException: Work already begun on this thread. Looks like you have called UnitOfWork.begin() twice without a balancing call to end() in between.at com.google.common.base.Preconditions.checkState(Preconditions.java:150)at com.google.inject.persist.jpa.JpaPersistService.begin(JpaPersistService.java:73)at com.jbl.MyRunnable.run(MyRunnable.java:107)