diff -r dd74a80a34d6 -r 1a95b1acb03f src/net/lemnik/eodsql/spi/util/DefaultDataObjectBinding.java
--- a/src/net/lemnik/eodsql/spi/util/DefaultDataObjectBinding.java	Fri Oct 29 21:13:08 2010 +0200
+++ b/src/net/lemnik/eodsql/spi/util/DefaultDataObjectBinding.java	Wed Jan 05 11:58:48 2011 +0100
@@ -13,6 +13,7 @@
 
 import java.util.Map;
 import java.util.Iterator;
+import java.util.concurrent.atomic.AtomicReference;
 
 import net.lemnik.eodsql.QueryTool;
 import net.lemnik.eodsql.TypeMapper;
@@ -38,7 +39,10 @@
 
     private String[] keyColumns = null;
 
-    private volatile boolean complete = false;
+    private enum State { NOT_COMPLETE, SET_BINDING_TYPE_IN_PROCESS, COMPLETION_IN_PROCESS, COMPLETE }
+    
+    private AtomicReference<State> complete 
+    	= new AtomicReference<DefaultDataObjectBinding.State>(State.NOT_COMPLETE); 
 
     DefaultDataObjectBinding(final Class<T> clazz) {
         setObjectType(clazz);
@@ -46,8 +50,7 @@
 
     private void complete(
             final ResultSetMetaData metaData)
-            throws SQLException,
-            EoDException {
+            throws EoDException {
 
         try {
             final DataObjectBindingCache cache =
@@ -68,6 +71,31 @@
         }
     }
 
+    private void ensureComplete(final ResultSetMetaData meta)
+    	throws EoDException {
+        do {
+            final State state = complete.get();
+            if (state == State.COMPLETE) {
+                break;
+            }
+            if (complete.compareAndSet(State.NOT_COMPLETE, State.COMPLETION_IN_PROCESS)) {
+        	try {
+        	    complete(meta);
+        	    complete.set(State.COMPLETE);
+        	    break;
+        	} catch (RuntimeException ex) {
+        	    complete.set(State.NOT_COMPLETE);
+        	    throw ex;
+        	}
+            } else {
+        	try {
+        	    Thread.sleep(1L);
+        	} catch (InterruptedException ex) {
+        	}
+            }
+        } while (true);
+    }
+
     /**
      * The implementation of the {@link #getKeyColumns()} method. This
      * implementation has no direct effect on the {@link #keyColumns}
@@ -197,8 +225,14 @@
 
     @Override
     public boolean setBindingType(final BindingType bindingType) {
-        if(!complete) {
-            return super.setBindingType(bindingType);
+        if (complete.compareAndSet(State.NOT_COMPLETE, State.SET_BINDING_TYPE_IN_PROCESS)) {
+            try
+            {
+        	return super.setBindingType(bindingType);
+            } finally
+            {
+        	complete.set(State.NOT_COMPLETE);
+            }
         }
 
         return false;
@@ -211,10 +245,7 @@
             throws SQLException,
             EoDException {
 
-        if(!complete) {
-            complete(row.getMetaData());
-            complete = true;
-        }
+	ensureComplete(row.getMetaData());
 
         final int length = columns.length;
 
@@ -241,10 +272,7 @@
 
         final ResultSetMetaData meta = results.getMetaData();
 
-        if(!complete) {
-            complete(meta);
-            complete = true;
-        }
+	ensureComplete(meta); 
 
         final int length = columns.length;