I downloaded latest master distribution and got following exception in karaf:

opendaylight-user@root>feature:install odl-l2switch-switch
opendaylight-user@root>Exception in thread "config-pusher" java.lang.NoSuchMethodError: org.opendaylight.yangtools.yang.binding.InstanceIdentifier$InstanceIdentifierBuilder.toInstance()Ljava/lang/Object;
at org.opendaylight.l2switch.loopremover.topology.TopologyLinkDataChangeHandler.registerAsDataChangeListener(TopologyLinkDataChangeHandler.java:99)
at org.opendaylight.yang.gen.v1.urn.opendaylight.packet.loop.remover.impl.rev140528.LoopRemoverModule.createInstance(LoopRemoverModule.java:57)
at org.opendaylight.yang.gen.v1.urn.opendaylight.packet.loop.remover.impl.rev140528.AbstractLoopRemoverModule.getInstance(AbstractLoopRemoverModule.java:112)
at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.opendaylight.controller.config.manager.impl.dependencyresolver.DependencyResolverManager$ModuleInvocationHandler.handleInvocation(DependencyResolverManager.java:149)
at com.google.common.reflect.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:70)
at com.sun.proxy.$Proxy30.getInstance(Unknown Source)
at org.opendaylight.controller.config.manager.impl.ConfigTransactionControllerImpl.secondPhaseCommit(ConfigTransactionControllerImpl.java:394)
at org.opendaylight.controller.config.manager.impl.ConfigRegistryImpl.secondPhaseCommit(ConfigRegistryImpl.java:280)
at org.opendaylight.controller.config.manager.impl.ConfigRegistryImpl.commitConfig(ConfigRegistryImpl.java:227)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:75)
at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:279)
at com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:193)
at com.sun.jmx.mbeanserver.ConvertingMethod.invokeWithOpenReturn(ConvertingMethod.java:175)
at com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:117)
at com.sun.jmx.mbeanserver.MXBeanIntrospector.invokeM2(MXBeanIntrospector.java:54)
at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:237)
at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:138)
at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:252)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at com.sun.jmx.mbeanserver.MXBeanProxy$InvokeHandler.invoke(MXBeanProxy.java:150)
at com.sun.jmx.mbeanserver.MXBeanProxy.invoke(MXBeanProxy.java:167)
at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:252)
at com.sun.proxy.$Proxy15.commitConfig(Unknown Source)
at org.opendaylight.controller.config.util.ConfigRegistryJMXClient.commitConfig(ConfigRegistryJMXClient.java:102)
at org.opendaylight.controller.netconf.confignetconfconnector.transactions.TransactionProvider.commitTransaction(TransactionProvider.java:110)
at org.opendaylight.controller.netconf.confignetconfconnector.operations.Commit.handleWithNoSubsequentOperations(Commit.java:54)
at org.opendaylight.controller.netconf.util.mapping.AbstractLastNetconfOperation.handle(AbstractLastNetconfOperation.java:33)
at org.opendaylight.controller.netconf.util.mapping.AbstractNetconfOperation.handle(AbstractNetconfOperation.java:100)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.sendRequestGetResponseCheckIsOK(ConfigPusherImpl.java:277)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.pushConfig(ConfigPusherImpl.java:236)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.pushConfigWithConflictingVersionRetries(ConfigPusherImpl.java:125)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.internalPushConfigs(ConfigPusherImpl.java:101)
at org.opendaylight.controller.netconf.persist.impl.ConfigPusherImpl.process(ConfigPusherImpl.java:76)
at org.opendaylight.controller.netconf.persist.impl.osgi.ConfigPersisterActivator$InnerCustomizer$1.run(ConfigPersisterActivator.java:175)
at java.lang.Thread.run(Thread.java:745)

Then I start mininet and I do not see any flood flow:

mininet@mininet-vm:~/integration\> sudo mn --controller=remote,ip=127.0.0.1 --topo tree,2

• • • Creating network
    • Adding controller
    • Adding hosts:
      h1 h2 h3 h4
    • Adding switches:
      s1 s2 s3
    • Adding links:
      (h1, s2) (h2, s2) (h3, s3) (h4, s3) (s1, s2) (s1, s3)
    • Configuring hosts
      h1 h2 h3 h4
    • Starting controller
    • Starting 3 switches
      s1 OVSswitch opts:
      s2 OVSswitch opts:
      s3 OVSswitch opts:

• • • Starting CLI:
      mininet> dpctl dump-flows
    • s1 ------------------------------------------------------------------------
      NXST_FLOW reply (xid=0x4):
      cookie=0x2b00000000000005, duration=12.511s, table=0, n_packets=8, n_bytes=504, idle_age=2, priority=100,dl_type=0x88cc actions=CONTROLLER:65535
    • s2 ------------------------------------------------------------------------
      NXST_FLOW reply (xid=0x4):
      cookie=0x2b00000000000003, duration=12.518s, table=0, n_packets=4, n_bytes=252, idle_age=2, priority=100,dl_type=0x88cc actions=CONTROLLER:65535
    • s3 ------------------------------------------------------------------------
      NXST_FLOW reply (xid=0x4):
      cookie=0x2b00000000000001, duration=12.519s, table=0, n_packets=4, n_bytes=252, idle_age=2, priority=100,dl_type=0x88cc actions=CONTROLLER:65535