fix(erlang): guard xdb:search against unconfigured pool

binding/erlang/src/xdb.erl

@@ -29,15 +29,20 @@ do_search(PoolName, Version, IpBin) ->
     case ets:lookup(CacheTable, IpBin) of
         [{_, Region}] -> Region;
         _ ->
-            Worker = poolboy:checkout(PoolName, true, infinity),
+            case whereis(PoolName) of
-            try
+                undefined ->
-                case ip2region_worker:search(Worker, IpBin) of
+                    {error, pool_not_configured};
-                    {error, _} = Err -> Err;
+                _ ->
-                    Region ->
+                    Worker = poolboy:checkout(PoolName, true, infinity),
-                        ets:insert(CacheTable, {IpBin, Region}),
+                    try
-                        Region
+                        case ip2region_worker:search(Worker, IpBin) of
-                end
+                            {error, _} = Err -> Err;
-            after
+                            Region ->
-                poolboy:checkin(PoolName, Worker)
+                                ets:insert(CacheTable, {IpBin, Region}),
+                                Region
+                        end
+                    after
+                        poolboy:checkin(PoolName, Worker)
+                    end
             end
     end.

binding/erlang/test/xdb_test.erl

@@ -34,6 +34,14 @@ invalid_search_test_() ->
         ?_assertEqual({error, bad_ip_format}, xdb:search({1,2,3}))
     ].
 
+ipv6_pool_not_configured_test() ->
+    try application:stop(ip2region) catch _:_ -> ok end,
+    try application:unload(ip2region) catch _:_ -> ok end,
+    ok = application:load(ip2region),
+    ok = application:set_env(ip2region, db, [{ipv4, "ip2region.xdb"}]),
+    {ok, _} = application:ensure_all_started(ip2region),
+    ?assertEqual({error, pool_not_configured}, xdb:search("2001:4860:4860::8888")).
+
 setup_ipv6() ->
     try application:stop(ip2region) catch _:_ -> ok end,
     try application:unload(ip2region) catch _:_ -> ok end,