Index: jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/CPManagedConnectionFactory.java
===================================================================
--- jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/CPManagedConnectionFactory.java	(revision 47843)
+++ jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/CPManagedConnectionFactory.java	(working copy)
@@ -154,7 +154,16 @@
         mc.initializeConnectionType(ManagedConnection.ISPOOLEDCONNECTION);
 
         //GJCINT
-        validateAndSetIsolation(mc);
+        try {
+            validateAndSetIsolation(mc);
+        } catch (ResourceException re) {
+            try {
+                mc.destroy();
+            } catch (ResourceException e) {
+                _logger.log(Level.WARNING, "jdbc.exc_destroy", e.getCause());
+            }
+            throw re;
+        }
         return mc;
     }
 
Index: jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/DMManagedConnectionFactory.java
===================================================================
--- jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/DMManagedConnectionFactory.java	(revision 47843)
+++ jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/DMManagedConnectionFactory.java	(working copy)
@@ -168,8 +168,16 @@
                 null, dsConn, pc, this);
 
         //GJCINT
-        setIsolation(mc);
-        isValid(mc);
+        try {
+            validateAndSetIsolation(mc);
+        } catch (ResourceException re) {
+            try {
+                mc.destroy();
+            } catch (ResourceException e) {
+                _logger.log(Level.WARNING, "jdbc.exc_destroy", e.getCause());
+            }
+            throw re;
+        }
         return mc;
     }
 
Index: jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/DSManagedConnectionFactory.java
===================================================================
--- jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/DSManagedConnectionFactory.java	(revision 47843)
+++ jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/DSManagedConnectionFactory.java	(working copy)
@@ -132,7 +132,16 @@
         ManagedConnection mc = constructManagedConnection(null, dsConn, pc, this);
 
         //GJCINT
-        validateAndSetIsolation(mc);
+        try {
+            validateAndSetIsolation(mc);
+        } catch (ResourceException re) {
+            try {
+                mc.destroy();
+            } catch (ResourceException e) {
+                _logger.log(Level.WARNING, "jdbc.exc_destroy", e.getCause());
+            }
+            throw re;
+        }
         return mc;
     }
 
Index: jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/XAManagedConnectionFactory.java
===================================================================
--- jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/XAManagedConnectionFactory.java	(revision 47843)
+++ jdbc-ra/jdbc-core/src/main/java/com/sun/gjc/spi/XAManagedConnectionFactory.java	(working copy)
@@ -133,7 +133,16 @@
 
         mc.initializeConnectionType(ManagedConnection.ISXACONNECTION);
         //GJCINT
-        validateAndSetIsolation(mc);
+        try {
+            validateAndSetIsolation(mc);
+        } catch (ResourceException re) {
+            try {
+                mc.destroy();
+            } catch (ResourceException e) {
+                _logger.log(Level.WARNING, "jdbc.exc_destroy", e.getCause());
+            }
+            throw re;
+        }
         return mc;
     }