Index: trunk/src/org/openstreetmap/josm/data/validation/tests/MultipolygonTest.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/MultipolygonTest.java	(revision 6385)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/MultipolygonTest.java	(revision 6386)
@@ -124,6 +124,9 @@
             List<Node> nodes = w.getNodes();
             if (nodes.size()<1) return; // fix zero nodes bug
-            errors.add(new TestError(this, Severity.WARNING, tr("Area style way is not closed"), NOT_CLOSED,
-                    Collections.singletonList(w), Arrays.asList(nodes.get(0), nodes.get(nodes.size() - 1))));
+            // Fix #9291 - Do not raise warning for sport=climbing + natural=cliff
+            if (!(w.hasTag("sport", "climbing") && w.hasTag("natural", "cliff"))) {
+                errors.add(new TestError(this, Severity.WARNING, tr("Area style way is not closed"), NOT_CLOSED,
+                        Collections.singletonList(w), Arrays.asList(nodes.get(0), nodes.get(nodes.size() - 1))));
+            }
         }
     }
Index: trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java	(revision 6385)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/UnclosedWays.java	(revision 6386)
@@ -68,5 +68,5 @@
         }
         test = w.get("sport");
-        if (test != null && !test.equals("water_slide")) {
+        if (test != null && !test.equals("water_slide") && !test.equals("climbing")) {
             set(1104, marktr("sport type {0}"), test);
         }