Fix intermittent test failures in CDS

[controller.git] / opendaylight / md-sal / sal-akka-raft / src / test / java / org / opendaylight / controller / cluster / raft / behaviors / AbstractLeaderElectionScenarioTest.java

diff --git a/opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractLeaderElectionScenarioTest.java b/opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractLeaderElectionScenarioTest.java
index 36f5fd502e3c9cc3d0559dc2c22ab1fd04b0feea..348b3d9acdd2e260de06edb222ddcf971ec609e9 100644 (file)
--- a/opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractLeaderElectionScenarioTest.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractLeaderElectionScenarioTest.java
@@ -203,13 +203,31 @@ public class AbstractLeaderElectionScenarioTest {
 
     void initializeLeaderBehavior(MemberActor actor, MockRaftActorContext context, int numActiveFollowers) throws Exception {
         // Leader sends immediate heartbeats - we don't care about it so ignore it.
+        // Sometimes the initial AppendEntries messages go to dead letters, probably b/c the follower actors
+        // haven't been fully created/initialized by akka. So we try up to 3 times to create the Leader as
+        // a workaround.
 
-        actor.expectMessageClass(AppendEntriesReply.class, numActiveFollowers);
+        Leader leader = null;
+        AssertionError lastAssertError = null;
+        for(int i = 1; i <= 3; i++) {
+            actor.expectMessageClass(AppendEntriesReply.class, numActiveFollowers);
+
+            leader = new Leader(context);
+            try {
+                actor.waitForExpectedMessages(AppendEntriesReply.class);
+                lastAssertError = null;
+                break;
+            } catch (AssertionError e) {
+                lastAssertError = e;
+            }
+        }
+
+        if(lastAssertError != null) {
+            throw lastAssertError;
+        }
 
-        Leader leader = new Leader(context);
         context.setCurrentBehavior(leader);
 
-        actor.waitForExpectedMessages(AppendEntriesReply.class);
         // Delay assignment here so the AppendEntriesReply isn't forwarded to the behavior.
         actor.behavior = leader;