This has been changed in the server.

Simon MacMullen · Simon MacMullen · commit 660b42e7b3f8 · 2010-08-11T11:44:53.000+01:00
diff --git a/test/src/com/rabbitmq/client/test/functional/TransactionsBase.java b/test/src/com/rabbitmq/client/test/functional/TransactionsBase.java
@@ -249,7 +249,7 @@ public void testUnknownTagAck()
             fail("expected exception");
         }
         catch (IOException e) {
-            checkShutdownSignal(AMQP.NOT_FOUND, e);
+            checkShutdownSignal(AMQP.PRECONDITION_FAILED, e);
         }
         connection = null;
         openConnection();

Original file line number	Diff line number	Diff line change
`@@ -249,7 +249,7 @@ public void testUnknownTagAck()`
`249`	`249`	`fail("expected exception");`
`250`	`250`	`}`
`251`	`251`	`catch (IOException e) {`
`252`		`- checkShutdownSignal(AMQP.NOT_FOUND, e);`
	`252`	`+ checkShutdownSignal(AMQP.PRECONDITION_FAILED, e);`
`253`	`253`	`}`
`254`	`254`	`connection = null;`
`255`	`255`	`openConnection();`