Add hint about disabling CH/LM when profile not found.

Author: easbar

core/src/main/java/com/graphhopper/routing/ch/CHProfileSelector.java

@@ -66,7 +66,9 @@ private CHProfile select() {
         }
 
         if (matchingProfiles.isEmpty()) {
-            throw new CHProfileSelectionException("Cannot find matching CH profile for your request.\nrequested:  " + getRequestAsString() + "\navailable: " + chProfiles);
+            throw new CHProfileSelectionException("Cannot find matching CH profile for your request. Please check your parameters." +
+                    "\nYou can try disabling CH using " + Parameters.CH.DISABLE + "=true" +
+                    "\nrequested:  " + getRequestAsString() + "\navailable: " + chProfiles);
         } else if (matchingProfiles.size() == 1) {
             return matchingProfiles.get(0);
         } else {
@@ -80,6 +82,7 @@ private CHProfile select() {
                 return match1.isEdgeBased() ? match1 : match2;
             }
             throw new CHProfileSelectionException("There are multiple CH profiles matching your request. Use the `weighting`,`vehicle`,`edge_based` and/or `u_turn_costs` parameters to be more specific." +
+                    "\nYou can also try disabling CH altogether using " + Parameters.CH.DISABLE + "=true" +
                     "\nrequested:  " + getRequestAsString() + "\nmatched:   " + matchingProfiles + "\navailable: " + chProfiles);
         }
     }

core/src/main/java/com/graphhopper/routing/lm/LMPreparationHandler.java

@@ -17,8 +17,6 @@
  */
 package com.graphhopper.routing.lm;
 
-import com.graphhopper.GHRequest;
-import com.graphhopper.GHResponse;
 import com.graphhopper.GraphHopperConfig;
 import com.graphhopper.routing.AlgorithmOptions;
 import com.graphhopper.routing.RoutingAlgorithm;
@@ -231,13 +229,11 @@ public RoutingAlgorithmFactory getAlgorithmFactory(HintsMap map) {
         // trivial to check whether or not this is the case so we do not allow this for now.
         String requestedString = (map.getWeighting().isEmpty() ? "*" : map.getWeighting()) + "|" +
                 (map.getVehicle().isEmpty() ? "*" : map.getVehicle());
-        throw new IllegalArgumentException("Cannot find matching LM profile for your request." +
+        throw new IllegalArgumentException("Cannot find matching LM profile for your request. Please check your parameters." +
+                "\nYou can try disabling LM by setting " + Parameters.Landmark.DISABLE + "=true" +
                 "\nrequested: " + requestedString + "\navailable: " + lmProfiles);
     }
 
-    /**
-     * @see com.graphhopper.GraphHopper#calcPaths(GHRequest, GHResponse)
-     */
     private static class LMRoutingAlgorithmFactory implements RoutingAlgorithmFactory {
         private RoutingAlgorithmFactory defaultAlgoFactory;
         private PrepareLandmarks p;

reader-osm/src/test/java/com/graphhopper/GraphHopperIT.java

@@ -1290,7 +1290,9 @@ public void testNodeBasedCHOnlyButTurnCostForNonCH() {
         assertMoscowNodeBased(tmpHopper, "false", true);
         GHResponse rsp = runMoscow(tmpHopper, "true", true);
         assertEquals(1, rsp.getErrors().size());
-        String expected = "Cannot find matching CH profile for your request.\nrequested:  *|car|edge_based=true|u_turn_costs=*\navailable: [fastest|car|edge_based=false]";
+        String expected = "Cannot find matching CH profile for your request. Please check your parameters." +
+                "\nYou can try disabling CH using ch.disable=true" +
+                "\nrequested:  *|car|edge_based=true|u_turn_costs=*\navailable: [fastest|car|edge_based=false]";
         assertTrue("unexpected error:\n" + rsp.getErrors().toString() + "\nwhen expecting an error containing:\n" + expected,
                 rsp.getErrors().toString().contains(expected));
     }
@@ -1314,7 +1316,9 @@ public void testEdgeBasedByDefaultIfOnlyEdgeBased() {
         GHResponse rsp = runMoscow(tmpHopper, "false", true);
         assertTrue(rsp.hasErrors());
         assertTrue("unexpected error: " + rsp.getErrors(), rsp.getErrors().toString().contains(
-                "Cannot find matching CH profile for your request.\nrequested:  *|car|edge_based=false|u_turn_costs=*\navailable: [fastest|car|edge_based=true|u_turn_costs=-1]"));
+                "Cannot find matching CH profile for your request. Please check your parameters." +
+                        "\nYou can try disabling CH using ch.disable=true" +
+                        "\nrequested:  *|car|edge_based=false|u_turn_costs=*\navailable: [fastest|car|edge_based=true|u_turn_costs=-1]"));
     }
 
     private GHResponse assertMoscowNodeBased(GraphHopper tmpHopper, String edgeBasedParam, boolean ch) {