Operating System: Linux
Platform: PC

https://git.opendaylight.org/gerrit/9527
https://git.opendaylight.org/gerrit/9528
https://git.opendaylight.org/gerrit/9532/

merged

Testing shows the following exceptions:

2014-08-02 18:08:20.583 CEST [pool-8-thread-1] WARN o.o.c.m.s.d.s.i.InMemoryDOMDataStore - Store Tx: DOM-CFG-185 Data Precondition failed for (urn:opendaylight:inventory?revision=2013-08-19)nodes.
org.opendaylight.yangtools.yang.data.api.schema.tree.ModifiedNodeDoesNotExistException: Node does not exist. Could not modify its children.
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkDoesNotExists(NormalizedNodeContainerModificationStrategy.java:176) ~[bundlefile:na]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkSubtreeModificationApplicable(NormalizedNodeContainerModificationStrategy.java:169) ~[bundlefile:na]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[bundlefile:na]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkChildPreconditions(NormalizedNodeContainerModificationStrategy.java:187) ~[bundlefile:na]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.NormalizedNodeContainerModificationStrategy.checkSubtreeModificationApplicable(NormalizedNodeContainerModificationStrategy.java:171) ~[bundlefile:na]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.SchemaAwareApplyOperation.checkApplicable(SchemaAwareApplyOperation.java:131) ~[bundlefile:na]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.RootModificationApplyOperation.checkApplicable(RootModificationApplyOperation.java:28) ~[bundlefile:na]
at org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTree.validate(InMemoryDataTree.java:89) ~[bundlefile:na]
at org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore$ThreePhaseCommitImpl$1.call(InMemoryDOMDataStore.java:315) [bundlefile:na]
at org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore$ThreePhaseCommitImpl$1.call(InMemoryDOMDataStore.java:311) [bundlefile:na]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_65]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_65]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_65]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_65]

After applying bandaid (https://git.opendaylight.org/gerrit/9610), the throughput is abysmal. Needs to be investigated.

I would suggest following:

issue write for /nodes/node/table/0 with ensure parents when node first appeared (this should be probably done by inventory manager upon learning existence of tables) so clients
could still write flows without ensure parents.

Error ModifiedNodeDoesNotExistException doesn't seem to be related to migration to new MD-SAL API. Nevertheless some changes were made while investigating this issue.

One of them is migration of inventory-manager to new MD-SAL API which is in commit : https://git.opendaylight.org/gerrit/#/c/9747/.

Another one is implementation of Tony's suggestion on issuing write on /nodes/node/table/0 which is in this commit https://git.opendaylight.org/gerrit/#/c/9771/.

Next investigation related to ModifiedNodeDoesNotExistException will be made under bug : OPNFLWPLUG-228 - Continuous ERROR logs in (https://bugs.opendaylight.org/show_bug.cgi?id=1490)