Ignore DataTreeChangeReply message

DataTreeChangeListenerActor is sending replies towards shard on each
processed datatree change. This is not handled by Shard, which ends up
flooding dead letters.

Make sure we ignore these messages, so that the logs are cleaner. Also
speed up the non-null check in DTCLActor.

JIRA: CONTROLLER-1986
Change-Id: I11b172d778c5b8cdf16aec58e77ec7faa9b6b146
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
(cherry picked from commit d6bc529eaf624afe74d9bf9ee9ab0cb926bba576)

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerActor.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerActor.java
index 5533fc8fad683756861305a45589115b422e4800..4901b036a3d0eb02ec7d5390f7ca93e6d50e6413 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerActor.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerActor.java
@@ -9,6 +9,7 @@ package org.opendaylight.controller.cluster.datastore;
 
 import static java.util.Objects.requireNonNull;
 
+import akka.actor.ActorRef;
 import akka.actor.Props;
 import org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor;
 import org.opendaylight.controller.cluster.datastore.messages.DataTreeChanged;
@@ -88,8 +89,9 @@ class DataTreeChangeListenerActor extends AbstractUntypedActor {
         // TODO: do we really need this?
         // It seems the sender is never null but it doesn't hurt to check. If the caller passes in
         // a null sender (ActorRef.noSender()), akka translates that to the deadLetters actor.
-        if (getSender() != null && !getContext().system().deadLetters().equals(getSender())) {
-            getSender().tell(DataTreeChangedReply.getInstance(), getSelf());
+        final ActorRef sender = getSender();
+        if (sender != null && !sender.equals(getContext().system().deadLetters())) {
+            sender.tell(DataTreeChangedReply.getInstance(), getSelf());
         }
     }
 

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
index d476b332b30dd35a73e9fe648b718149653cd8fe..886b26f96589625cfca5458bab81952731597ad4 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
@@ -77,6 +77,7 @@ import org.opendaylight.controller.cluster.datastore.messages.CloseTransactionCh
 import org.opendaylight.controller.cluster.datastore.messages.CommitTransaction;
 import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction;
 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply;
+import org.opendaylight.controller.cluster.datastore.messages.DataTreeChangedReply;
 import org.opendaylight.controller.cluster.datastore.messages.ForwardedReadyTransaction;
 import org.opendaylight.controller.cluster.datastore.messages.GetKnownClients;
 import org.opendaylight.controller.cluster.datastore.messages.GetKnownClientsReply;
@@ -349,6 +350,8 @@ public class Shard extends RaftActor {
                 handleAbortTransaction(AbortTransaction.fromSerializable(message));
             } else if (CloseTransactionChain.isSerializedType(message)) {
                 closeTransactionChain(CloseTransactionChain.fromSerializable(message));
+            } else if (message instanceof DataTreeChangedReply) {
+                // Ignore reply
             } else if (message instanceof RegisterDataTreeChangeListener) {
                 treeChangeSupport.onMessage((RegisterDataTreeChangeListener) message, isLeader(), hasLeader());
             } else if (message instanceof UpdateSchemaContext) {