diff -r acd677795920 modules/xdr/src/main/java/org/dcache/xdr/ClientTransport.java
--- a/modules/xdr/src/main/java/org/dcache/xdr/ClientTransport.java
+++ b/modules/xdr/src/main/java/org/dcache/xdr/ClientTransport.java
@@ -39,7 +39,7 @@ public class ClientTransport implements 
     }
 
     @Override
-    public void send(Xdr data)
+    public void send(Xdr data) throws IOException
     {
         Buffer buffer = data.body();
         _connection.write(buffer);
diff -r acd677795920 modules/xdr/src/main/java/org/dcache/xdr/GrizzlyXdrTransport.java
--- a/modules/xdr/src/main/java/org/dcache/xdr/GrizzlyXdrTransport.java
+++ b/modules/xdr/src/main/java/org/dcache/xdr/GrizzlyXdrTransport.java
@@ -21,10 +21,7 @@ import java.io.IOException;
 import java.net.InetSocketAddress;
 import org.glassfish.grizzly.Buffer;
 import org.glassfish.grizzly.Connection;
-import org.glassfish.grizzly.asyncqueue.PushBackContext;
 import org.glassfish.grizzly.filterchain.FilterChainContext;
-import org.glassfish.grizzly.asyncqueue.PushBackHandler;
-import org.glassfish.grizzly.asyncqueue.WritableMessage;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -32,7 +29,6 @@ import org.slf4j.LoggerFactory;
 public class GrizzlyXdrTransport implements XdrTransport {
 
     private final FilterChainContext _context;
-    private static final PushBackHandler RERTY_ON_PUSHBACK = new RetryPushBackHandler();
 
     private final static Logger _log = LoggerFactory.getLogger(GrizzlyXdrTransport.class);
 
@@ -41,13 +37,13 @@ public class GrizzlyXdrTransport impleme
     }
 
     @Override
-    public void send(Xdr xdr)
+    public void send(Xdr xdr) throws IOException
     {
         Buffer buffer = xdr.body();
         buffer.allowBufferDispose(true);
 
          // pass destination address to handle UDP connections as well
-        _context.write(_context.getAddress(), buffer, null, RERTY_ON_PUSHBACK);
+        _context.write(_context.getAddress(), buffer, null);
     }
 
     @Override
@@ -64,23 +60,4 @@ public class GrizzlyXdrTransport impleme
     public ReplyQueue<Integer, RpcReply> getReplyQueue() {
         return null;
     }
-
-    /**
-     * An implementation of {@link PushBackHandler}, which will enforce Grizzly's
-     * {@link org.glassfish.grizzly.Writer} to retry when possible if
-     * message can not be neither written nor added to write queue due
-     * to I/O or memory limitations.
-     */
-    private static class RetryPushBackHandler implements PushBackHandler {
-
-        @Override
-        public void onAccept(Connection connection, WritableMessage message) {
-            // NOP
-        }
-
-        @Override
-        public void onPushBack(Connection connection, WritableMessage message, PushBackContext pushBackContext) {
-            pushBackContext.retryWhenPossible();
-        }
-    }
 }
diff -r acd677795920 modules/xdr/src/main/java/org/dcache/xdr/OncRpcSvc.java
--- a/modules/xdr/src/main/java/org/dcache/xdr/OncRpcSvc.java
+++ b/modules/xdr/src/main/java/org/dcache/xdr/OncRpcSvc.java
@@ -139,7 +139,6 @@ public class OncRpcSvc {
                     TCPNIOTransportBuilder.newInstance()
                     .setReuseAddress(true)
                     .setIOStrategy(grizzlyIoStrategy)
-                    .setMaxAsyncWriteQueueSizeInBytes(4*1024*1024)
                     .build();
             _transports.add(tcpTransport);
         }
diff -r acd677795920 pom.xml
--- a/pom.xml
+++ b/pom.xml
@@ -292,7 +292,7 @@
         <dependency>
             <groupId>org.glassfish.grizzly</groupId>
             <artifactId>grizzly-framework</artifactId>
-            <version>2.3-SNAPSHOT</version>
+            <version>2.1.11</version>
         </dependency>
         <dependency>
             <groupId>com.sleepycat</groupId>