synchronize access to lastWrite future

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@627154 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 11 insertions, 4 deletions

diff --git a/java/common/src/main/java/org/apache/qpidity/transport/network/mina/MinaSender.java b/java/common/src/main/java/org/apache/qpidity/transport/network/mina/MinaSender.java
index 17ae7ea0f7..f0f5731037 100644
--- a/java/common/src/main/java/org/apache/qpidity/transport/network/mina/MinaSender.java
+++ b/java/common/src/main/java/org/apache/qpidity/transport/network/mina/MinaSender.java
@@ -51,16 +51,23 @@ public class MinaSender implements Sender<java.nio.ByteBuffer>
         {
             throw new TransportException("attempted to write to a closed socket");
         }
-        lastWrite = session.write(ByteBuffer.wrap(buf));
+
+        synchronized (this)
+        {
+            lastWrite = session.write(ByteBuffer.wrap(buf));
+        }
     }
 
-    public void close()
+    public synchronized void close()
     {
         // MINA will sometimes throw away in-progress writes when you
         // ask it to close
-        if (lastWrite != null)
+        synchronized (this)
         {
-            lastWrite.join();
+            if (lastWrite != null)
+            {
+                lastWrite.join();
+            }
         }
         CloseFuture closed = session.close();
         closed.join();