[CONTROLLER-630] Exceptions when multiple concurrent restconf clients are trying to add flows to the controller. Created: 16/Jul/14  Updated: 17/Oct/14  Resolved: 17/Oct/14

Status: Resolved
Project: controller
Component/s: mdsal
Affects Version/s: Helium
Fix Version/s: None

Type: Bug
Reporter: Jan Medved Assignee: Tony Tkacik
Resolution: Cannot Reproduce Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified
Environment:

Operating System: Mac OS
Platform: Macintosh

External issue ID: 1374

 Description   

See OPNFLWJAVA-29 (https://bugs.opendaylight.org/show_bug.cgi?id=1373): in addition to the openflowjava null pointer exceptions, there are md-sal null pointer exceptions.

for example:
2014-07-15 23:02:08.671 PDT [pool-8-thread-1] ERROR o.o.c.m.s.b.i.ForwardedBackwardsCompatibleDataBroker - Transaction DOM-325 failed to complete
org.opendaylight.controller.md.sal.common.api.data.OptimisticLockFailedException: Optimistic lock failed.
at org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore$ThreePhaseCommitImpl$1.call(InMemoryDOMDataStore.java:321) ~[na:na]
at org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore$ThreePhaseCommitImpl$1.call(InMemoryDOMDataStore.java:311) ~[na:na]

or

java.lang.IllegalStateException: null
at com.google.common.base.Preconditions.checkState(Preconditions.java:133) ~[bundlefile:na]
at org.opendaylight.controller.sal.dom.broker.impl.SchemaAwareRpcBroker.invokeRpc(SchemaAwareRpcBroker.java:261) ~[na:na]
at org.opendaylight.controller.sal.dom.broker.impl.SchemaAwareRpcBroker$RoutedRpcSelector.invokeRpc(SchemaAwareRpcBroker.java:360) ~[na:na]
at org.opendaylight.controller.sal.dom.broker.impl.SchemaAwareRpcBroker.invokeRpc(SchemaAwareRpcBroker.java:186) ~[na:na]
at org.opendaylight.controller.sal.dom.broker.osgi.RpcProvisionRegistryProxy.invokeRpc(RpcProvisionRegistryProxy.java:67) ~[na:na]
at org.opendaylight.controller.sal.binding.impl.connect.dom.RpcInvocationStrategy.forwardToDomBroker(RpcInvocationStrategy.java:121) ~[na:na]
at org.opendaylight.controller.sal.binding.impl.connect.dom.BindingIndependentConnector$DomToBindingRpcForwarder.invoke(BindingIndependentConnector.java:718) ~[na:na]

See OPNFLWJAVA-29 for the logs and how to reproduce.

 Comments   
Comment by Tony Tkacik [ 16/Jul/14 ]

There is no null pointer for MD-SAL exception just did not contained error
java.lang.IllegalStateException: null
at com.google.common.base.Preconditions.checkState(Preconditions.java:133)
Openflow device / rpc service was unregister from MD-SAL.
Patchset https://git.opendaylight.org/gerrit/9054 improves exception and adds error report to it.

Seems mininet was disconnected when data change events were still in processing.

Comment by Jan Medved [ 16/Jul/14 ]

There was no disconnection of mininet - afaik it was connected all the time

Comment by Jan Medved [ 16/Jul/14 ]

Also, since this can happen at any time, please handle in regular code, not in an exception.

Comment by Tony Tkacik [ 23/Jul/14 ]

Tried to replicate, this happens only if you run your testsuite with mininet lower than 16 nodes and this failures are reported for nodes 8-16.

Comment by Jan Medved [ 23/Jul/14 ]

Let me try to reproduce. Still needs fixing.

Comment by Jan Medved [ 23/Jul/14 ]

Actually, on my machine, it happens with other mininet configurations.

Comment by Jan Medved [ 28/Jul/14 ]

Tried this with a new build (Friday), still lots of exceptions, even with one thread. Try this with no mininet attached - it looks like there are these two per flow - IllegalStateException and Unhandled exception during invoking listener AbstractObjectRegistration:

java.lang.IllegalStateException: null
at com.google.common.base.Preconditions.checkState(Preconditions.java:133) ~[na:na]
at org.opendaylight.controller.sal.binding.impl.connect.dom.DomToBindingRpcForwarder.invoke(DomToBindingRpcForwarder.java:179) ~[na:na]
at com.sun.proxy.$Proxy100.removeFlow(Unknown Source) ~[na:na]
at org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.SalFlowService$$Broker$Router.removeFlow(SalFlowService$$Broker$Router.java) ~[na:na]
at org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.SalFlowService$$Broker$DirectProxy.removeFlow(SalFlowService$$Broker$DirectProxy.java) ~[na:na]
at org.opendaylight.controller.frm.flow.FlowChangeListener.remove(FlowChangeListener.java:73) ~[na:na]
at org.opendaylight.controller.frm.AbstractChangeListener.onDataChanged(AbstractChangeListener.java:69) ~[na:na]
at org.opendaylight.controller.md.sal.binding.impl.ForwardedBackwardsCompatibleDataBroker$BackwardsCompatibleConfigurationDataChangeInvoker.onDataChanged(ForwardedBackwardsCompatibleDataBroker.java:452) ~[na:na]
at org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedDataBroker$TranslatingDataChangeInvoker.onDataChanged(AbstractForwardedDataBroker.java:180) ~[na:na]
at org.opendaylight.controller.md.sal.dom.store.impl.ChangeListenerNotifyTask.run(ChangeListenerNotifyTask.java:33) ~[na:na]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_60]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_60]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_60]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_60]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_60]

2014-07-27 20:11:43.550 PDT [pool-12-thread-1] ERROR o.o.c.m.s.d.s.i.ChangeListenerNotifyTask - Unhandled exception during invoking listener AbstractObjectRegistration

{instance=org.opendaylight.controller.md.sal.binding.impl.AbstractForwardedDataBroker$TranslatingDataChangeInvoker@2dd70dde}

with event DOMImmutableDataChangeEvent [created=[], updated=[], removed=[(urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)id, (urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow-name, (urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)instructions/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)order=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction/(urn:opendaylight:flow:inventory?revision=2013-08-19)apply-actions/(urn:opendaylight:flow:inventory?revision=2013-08-19)action/(urn:opendaylight:flow:inventory?revision=2013-08-19)action[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)order=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)action/(urn:opendaylight:flow:inventory?revision=2013-08-19)dec-nw-ttl, (urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)instructions/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)order=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction/(urn:opendaylight:flow:inventory?revision=2013-08-19)apply-actions/(urn:opendaylight:flow:inventory?revision=2013-08-19)action, (urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)hard-timeout, (urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)instructions/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)order=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction/(urn:opendaylight:flow:inventory?revision=2013-08-19)apply-actions, (urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)match/(urn:opendaylight:flow:inventory?revision=2013-08-19)metadata/(urn:opendaylight:flow:inventory?revision=2013-08-19)metadata, (urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)idle-timeout, (urn:opendaylight:inventory?revision=2013-08-19)nodes/(urn:opendaylight:inventory?revision=2013-08-19)node/(urn:opendaylight:inventory?revision=2013-08-19)node[

{(urn:opendaylight:inventory?revision=2013-08-19)id=openflow:0}

]/AugmentationIdentifier

{childNames=[(urn:opendaylight:flow:inventory?revision=2013-08-19)manufacturer, (urn:opendaylight:flow:inventory?revision=2013-08-19)hardware, (urn:opendaylight:flow:inventory?revision=2013-08-19)software, (urn:opendaylight:flow:inventory?revision=2013-08-19)serial-number, (urn:opendaylight:flow:inventory?revision=2013-08-19)description, (urn:opendaylight:flow:inventory?revision=2013-08-19)group, (urn:opendaylight:flow:inventory?revision=2013-08-19)table, (urn:opendaylight:flow:inventory?revision=2013-08-19)meter, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-match-types, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-instructions, (urn:opendaylight:flow:inventory?revision=2013-08-19)supported-actions, (urn:opendaylight:flow:inventory?revision=2013-08-19)switch-features]}

/(urn:opendaylight:flow:inventory?revision=2013-08-19)table/(urn:opendaylight:flow:inventory?revision=2013-08-19)table[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow/(urn:opendaylight:flow:inventory?revision=2013-08-19)flow[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)id=92}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)instructions/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)order=0}

]/(urn:opendaylight:flow:inventory?revision=2013-08-19)instruction/(urn:opendaylight:flow:inventory?revision=2013-08-19)apply-actions/(urn:opendaylight:flow:inventory?revision=2013-08-19)action/(urn:opendaylight:flow:inventory?revision=2013-08-19)action[

{(urn:opendaylight:flow:inventory?revision=2013-08-19)order=0}

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