ZOOKEEPER-2806: Flaky test: org.apache.zookeeper.server.quorum.FLEBackwardElectionRoundTest.testBackwardElectionRound

Change-Id: Ia92eb2b2dfbd9b7c464abdc7ae018f426e591538

src/java/test/org/apache/zookeeper/server/quorum/FLEBackwardElectionRoundTest.java

@@ -100,7 +100,8 @@ public class FLEBackwardElectionRoundTest extends ZKTestCase {
             port[i] = clientport;
         }
 
-        ByteBuffer initialMsg = FLETestUtils.createMsg(ServerState.FOLLOWING.ordinal(), 0, 0, 1);
+        ByteBuffer initialMsg0 = getMsg();
+        ByteBuffer initialMsg1 = getMsg();
 
         /*
          * Start server 0
@@ -117,7 +118,7 @@ public class FLEBackwardElectionRoundTest extends ZKTestCase {
         cnxManagers[0] = new QuorumCnxManager(mockPeer);
         cnxManagers[0].listener.start();
 
-        cnxManagers[0].toSend(0l, initialMsg);
+        cnxManagers[0].toSend(0l, initialMsg0);
 
         /*
          * Start mock server 2
@@ -126,7 +127,7 @@ public class FLEBackwardElectionRoundTest extends ZKTestCase {
         cnxManagers[1] = new QuorumCnxManager(mockPeer);
         cnxManagers[1].listener.start();
 
-        cnxManagers[1].toSend(0l, initialMsg);
+        cnxManagers[1].toSend(0l, initialMsg1);
 
         /*
          * Run another instance of leader election.
@@ -138,8 +139,8 @@ public class FLEBackwardElectionRoundTest extends ZKTestCase {
         /*
          * Send the same messages, this time should not make 0 the leader.
          */
-        cnxManagers[0].toSend(0l, initialMsg);
-        cnxManagers[1].toSend(0l, initialMsg);
+        cnxManagers[0].toSend(0l, initialMsg0);
+        cnxManagers[1].toSend(0l, initialMsg1);
 
         thread.join(5000);
 
@@ -148,4 +149,8 @@ public class FLEBackwardElectionRoundTest extends ZKTestCase {
         }
 
     }
+
+    private ByteBuffer getMsg() {
+        return FLETestUtils.createMsg(ServerState.FOLLOWING.ordinal(), 0, 0, 1);
+    }
 }