Java exception when stopping controller under karaf:

opendaylight-user@root>system:shutdown
Confirm: halt instance root (yes/no): yes
opendaylight-user@root>Exception in thread "pool-21-thread-6" java.lang.IllegalStateException: Transaction factory was already closed
at com.google.common.base.Preconditions.checkState(Preconditions.java:149)
at org.opendaylight.controller.md.sal.dom.broker.impl.AbstractDOMForwardedTransactionFactory.close(AbstractDOMForwardedTransactionFactory.java:215)
at org.opendaylight.controller.md.sal.dom.broker.impl.DOMDataBrokerTransactionChainImpl.close(DOMDataBrokerTransactionChainImpl.java:80)
at org.opendaylight.controller.md.sal.binding.impl.BindingTranslatedTransactionChain.close(BindingTranslatedTransactionChain.java:118)
at org.opendaylight.controller.md.inventory.manager.FlowCapableInventoryProvider.close(FlowCapableInventoryProvider.java:85)
at org.opendaylight.controller.md.inventory.manager.InventoryActivator.stopImpl(InventoryActivator.java:36)
at org.opendaylight.controller.sal.binding.api.AbstractBrokerAwareActivator.onBrokerRemoved(AbstractBrokerAwareActivator.java:126)
at org.opendaylight.controller.sal.binding.api.AbstractBrokerAwareActivator$1$2.run(AbstractBrokerAwareActivator.java:53)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
carolsand@caslab-XPS-12-9Q23:~/Projects/ODL/distribution-karaf-0.2.0-SNAPSHOT$

JAVA INFO:
carolsand@caslab-XPS-12-9Q23:~/Projects/ODL/distribution-karaf-0.2.0-SNAPSHOT$ java -version
java version "1.7.0_65"
OpenJDK Runtime Environment (IcedTea 2.5.1) (7u65-2.5.1-4ubuntu1~0.14.04.2)
OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)