The R13B03 release.OTP_R13B03

1 files changed, 1415 insertions, 0 deletions

diff --git a/lib/kernel/test/global_group_SUITE.erl b/lib/kernel/test/global_group_SUITE.erl
new file mode 100644
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+++ b/lib/kernel/test/global_group_SUITE.erl
@@ -0,0 +1,1415 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 1998-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+
+-module(global_group_SUITE).
+
+-export([all/1]).
+-export([start_gg_proc/1, no_gg_proc/1, no_gg_proc_sync/1, compatible/1, 
+	 one_grp/1, one_grp_x/1, two_grp/1, hidden_groups/1, test_exit/1]).
+-export([init/1, init/2, init2/2, start_proc/1, start_proc_rereg/1]).
+
+-export([init_per_testcase/2, fin_per_testcase/2]).
+
+%-compile(export_all).
+
+-include("test_server.hrl").
+
+-define(NODES, [node()|nodes()]).
+
+-define(UNTIL(Seq), loop_until_true(fun() -> Seq end)).
+
+all(suite) -> 
+    [start_gg_proc, no_gg_proc, no_gg_proc_sync, 
+     compatible, one_grp, one_grp_x, two_grp, test_exit,
+     hidden_groups].
+
+-define(TESTCASE, testcase_name).
+-define(testcase, ?config(?TESTCASE, Config)).
+
+init_per_testcase(Case, Config) when atom(Case), list(Config) ->
+    Dog=?t:timetrap(?t:minutes(5)),
+    [{?TESTCASE, Case}, {watchdog, Dog}|Config].
+
+fin_per_testcase(_Func, Config) ->
+    Dog=?config(watchdog, Config),
+    ?t:timetrap_cancel(Dog).
+
+%%-----------------------------------------------------------------
+%% Test suites for global groups.
+%% Should be started in a CC view with:
+%% erl -sname XXX -rsh ctrsh where XXX not in [cp1 .. cpN]
+%%-----------------------------------------------------------------
+
+
+start_gg_proc(suite) -> [];
+start_gg_proc(doc) -> ["Check that the global_group processes are started automatically. "];
+start_gg_proc(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(120)),
+
+    ?line Dir = ?config(priv_dir, Config),
+    ?line File = filename:join(Dir, "global_group.config"),
+    ?line {ok, Fd}=file:open(File, write),
+    [Ncp1,Ncp2,Ncp3] = node_names([cp1, cp2, cp3], Config),
+    ?line config(Fd, Ncp1, Ncp2, Ncp3, "cpx", "cpy", "cpz", "cpq"),
+
+    ?line Cp1nn = node_at(Ncp1),
+    ?line Cp2nn = node_at(Ncp2),
+    ?line Cp3nn = node_at(Ncp3),
+
+    ?line {ok, Cp1} = start_node(Ncp1, Config),
+    ?line {ok, Cp2} = start_node(Ncp2, Config),
+    ?line {ok, Cp3} = start_node(Ncp3, Config),
+
+    ?line [] = rpc:call(Cp1, global_group, registered_names, [{node, Cp1nn}]),
+    ?line [] = rpc:call(Cp2, global_group, registered_names, [{node, Cp2nn}]),
+    ?line [] = rpc:call(Cp3, global_group, registered_names, [{node, Cp3nn}]),
+
+    % stop the nodes, and make sure names are released.
+    stop_node(Cp1),
+    stop_node(Cp2),
+    stop_node(Cp3),
+
+    ?line ?UNTIL(undefined =:= global:whereis_name(test)),
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+
+no_gg_proc(suite) -> [];
+no_gg_proc(doc) -> ["Start a system without global groups. Nodes are not "
+		    "synced at start (sync_nodes_optional is not defined)"];
+no_gg_proc(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(200)),
+
+    ?line Dir = ?config(priv_dir, Config),
+    ?line File = filename:join(Dir, "no_global_group.config"),
+    ?line {ok, Fd} = file:open(File, write),
+    ?line config_no(Fd),
+
+    ?line NN = node_name(atom_to_list(node())),
+    ?line Cp1nn = list_to_atom("cp1@" ++ NN),
+    ?line Cp2nn = list_to_atom("cp2@" ++ NN),
+    ?line Cp3nn = list_to_atom("cp3@" ++ NN),
+    ?line Cpxnn = list_to_atom("cpx@" ++ NN),
+    ?line Cpynn = list_to_atom("cpy@" ++ NN),
+    ?line Cpznn = list_to_atom("cpz@" ++ NN),
+
+    ?line {ok, Cp1} = start_node_no(cp1, Config),
+    ?line {ok, Cp2} = start_node_no(cp2, Config),
+    ?line {ok, Cp3} = start_node_no(cp3, Config),
+    ?line {ok, Cpx} = start_node_no(cpx, Config),
+    ?line {ok, Cpy} = start_node_no(cpy, Config),
+    ?line {ok, Cpz} = start_node_no(cpz, Config),
+
+    %% let the nodes know of each other
+    ?line pong = rpc:call(Cp1, net_adm, ping, [Cp2nn]),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cp3nn]),
+    ?line pong = rpc:call(Cp3, net_adm, ping, [Cpxnn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cpynn]),
+    ?line pong = rpc:call(Cpy, net_adm, ping, [Cpznn]),
+
+    ?line wait_for_ready_net(),
+
+    ?line [test_server] = rpc:call(Cp1, global_group, registered_names, [{node, Cp1nn}]),
+    ?line [test_server] = rpc:call(Cp2, global_group, registered_names, [{node, Cp2nn}]),
+    ?line [test_server] = rpc:call(Cp3, global_group, registered_names, [{node, Cp3nn}]),
+    ?line [test_server] = rpc:call(Cp1, global_group, registered_names, [{node, Cpxnn}]),
+    ?line [test_server] = rpc:call(Cp2, global_group, registered_names, [{node, Cpynn}]),
+    ?line [test_server] = rpc:call(Cp3, global_group, registered_names, [{node, Cpznn}]),
+
+
+    % start a proc and register it
+    ?line {Pid2, yes} = rpc:call(Cp2, ?MODULE, start_proc, [test2]),
+
+    ?line RegNames = lists:sort([test2,test_server]),
+
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp1, global_group, registered_names, [{node, Cp1nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp2, global_group, registered_names, [{node, Cp2nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp3, global_group, registered_names, [{node, Cp3nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp1, global_group, registered_names, [{node, Cpxnn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp2, global_group, registered_names, [{node, Cpynn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp3, global_group, registered_names, [{node, Cpznn}])),
+
+
+    ?line undefined = rpc:call(Cp3, global_group, global_groups, []),
+
+    ?line Own_nodes_should = [node(), Cp1nn, Cp2nn, Cp3nn, 
+			      Cpxnn, Cpynn, Cpznn],
+    ?line Own_nodes = rpc:call(Cp3, global_group, own_nodes, []), 
+    ?line true = (Own_nodes -- Own_nodes_should) =:= [],
+    ?line true = (Own_nodes_should -- Own_nodes) =:= [],
+    
+    ?line Pid2 = rpc:call(Cp1, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout2)
+				 end,
+    ?line Pid2 = rpc:call(Cp2, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout3)
+				 end,
+    ?line Pid2 = rpc:call(Cpz, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout4)
+				 end,
+
+
+    % start a proc and register it
+    ?line {PidX, yes} = rpc:call(Cpx, ?MODULE, start_proc, [test]),
+
+
+    %%------------------------------------
+    %% Test monitor nodes
+    %%------------------------------------
+    ?line Pid2 = rpc:call(Cp1, global_group, send, [{node, Cp2nn}, test2, monitor]),
+    ?line PidX = rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, monitor]),
+
+
+    % Kill node Cp1
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodedown, Cp1}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodedown, Cp1}]),
+    ?line test_server:sleep(100),
+    ?line stop_node(Cp1),
+    ?line test_server:sleep(1000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Kill node Cpz
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodedown, Cpz}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodedown, Cpz}]),
+    ?line test_server:sleep(100),
+    ?line stop_node(Cpz),
+    ?line test_server:sleep(1000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Restart node Cp1
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodeup, Cp1}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodeup, Cp1}]),
+    ?line {ok, Cp1} = start_node_no(cp1, Config),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cp1nn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cp1nn]),
+    ?line wait_for_ready_net(),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Restart node Cpz
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodeup, Cpz}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodeup, Cpz}]),
+    ?line {ok, Cpz} = start_node_no(cpz, Config),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cpznn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cpznn]),
+    ?line wait_for_ready_net(),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % stop the nodes, and make sure names are released.
+    stop_node(Cp1),
+    stop_node(Cp2),
+    stop_node(Cp3),
+    stop_node(Cpx),
+    stop_node(Cpy),
+    stop_node(Cpz),
+
+    ?line ?UNTIL(undefined =:= global:whereis_name(test)),
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+
+
+no_gg_proc_sync(suite) -> [];
+no_gg_proc_sync(doc) -> 
+    ["Start a system without global groups, but syncing the nodes by using " 
+     "sync_nodes_optional."];
+no_gg_proc_sync(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(200)),
+
+    ?line Dir = ?config(priv_dir, Config),
+    ?line File = filename:join(Dir, "no_global_group_sync.config"),
+    ?line {ok, Fd} = file:open(File, write),
+
+    [Ncp1,Ncp2,Ncp3,Ncpx,Ncpy,Ncpz] = 
+        node_names([cp1,cp2,cp3,cpx,cpy,cpz], Config),
+    ?line config_sync(Fd, Ncp1, Ncp2, Ncp3, Ncpx, Ncpy, Ncpz),
+
+    ?line Cp1nn = node_at(Ncp1),
+    ?line Cp2nn = node_at(Ncp2),
+    ?line Cp3nn = node_at(Ncp3),
+    ?line Cpxnn = node_at(Ncpx),
+    ?line Cpynn = node_at(Ncpy),
+    ?line Cpznn = node_at(Ncpz),
+
+    ?line {ok, Cp1} = start_node_no2(Ncp1, Config),
+    ?line {ok, Cp2} = start_node_no2(Ncp2, Config),
+    ?line {ok, Cp3} = start_node_no2(Ncp3, Config),
+    ?line {ok, Cpx} = start_node_no2(Ncpx, Config),
+    ?line {ok, Cpy} = start_node_no2(Ncpy, Config),
+    ?line {ok, Cpz} = start_node_no2(Ncpz, Config),
+
+    %% let the nodes know of each other
+    ?line pong = rpc:call(Cp1, net_adm, ping, [Cp2nn]),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cp3nn]),
+    ?line pong = rpc:call(Cp3, net_adm, ping, [Cpxnn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cpynn]),
+    ?line pong = rpc:call(Cpy, net_adm, ping, [Cpznn]),
+
+    ?line wait_for_ready_net(),
+
+    ?line [test_server] = rpc:call(Cp1, global_group, registered_names, [{node, Cp1nn}]),
+    ?line [test_server] = rpc:call(Cp2, global_group, registered_names, [{node, Cp2nn}]),
+    ?line [test_server] = rpc:call(Cp3, global_group, registered_names, [{node, Cp3nn}]),
+    ?line [test_server] = rpc:call(Cp1, global_group, registered_names, [{node, Cpxnn}]),
+    ?line [test_server] = rpc:call(Cp2, global_group, registered_names, [{node, Cpynn}]),
+    ?line [test_server] = rpc:call(Cp3, global_group, registered_names, [{node, Cpznn}]),
+
+
+    % start a proc and register it
+    ?line {Pid2, yes} = rpc:call(Cp2, ?MODULE, start_proc, [test2]),
+
+    ?line RegNames = lists:sort([test2,test_server]),
+
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp1, global_group, registered_names, [{node, Cp1nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp2, global_group, registered_names, [{node, Cp2nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp3, global_group, registered_names, [{node, Cp3nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp1, global_group, registered_names, [{node, Cpxnn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp2, global_group, registered_names, [{node, Cpynn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp3, global_group, registered_names, [{node, Cpznn}])),
+
+
+    ?line undefined = rpc:call(Cp3, global_group, global_groups, []),
+
+    ?line Own_nodes_should = [node(), Cp1nn, Cp2nn, Cp3nn, 
+			      Cpxnn, Cpynn, Cpznn],
+    ?line Own_nodes = rpc:call(Cp3, global_group, own_nodes, []), 
+    ?line true = (Own_nodes -- Own_nodes_should) =:= [],
+    ?line true = (Own_nodes_should -- Own_nodes) =:= [],
+    
+    ?line Pid2 = rpc:call(Cp1, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout2)
+				 end,
+    ?line Pid2 = rpc:call(Cp2, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout3)
+				 end,
+    ?line Pid2 = rpc:call(Cpz, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout4)
+				 end,
+
+
+    % start a proc and register it
+    ?line {PidX, yes} = rpc:call(Cpx, ?MODULE, start_proc, [test]),
+
+
+    %%------------------------------------
+    %% Test monitor nodes
+    %%------------------------------------
+    ?line Pid2 = rpc:call(Cp1, global_group, send, [{node, Cp2nn}, test2, monitor]),
+    ?line PidX = rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, monitor]),
+
+
+    % Kill node Cp1
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodedown, Cp1}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodedown, Cp1}]),
+    ?line test_server:sleep(100),
+    ?line stop_node(Cp1),
+    ?line test_server:sleep(1000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Kill node Cpz
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodedown, Cpz}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodedown, Cpz}]),
+    ?line test_server:sleep(100),
+    ?line stop_node(Cpz),
+    ?line test_server:sleep(1000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Restart node Cp1
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodeup, Cp1}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodeup, Cp1}]),
+    ?line {ok, Cp1} = start_node_no2(Ncp1, Config),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cp1nn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cp1nn]),
+    ?line wait_for_ready_net(),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Restart node Cpz
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodeup, Cpz}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodeup, Cpz}]),
+    ?line {ok, Cpz} = start_node_no2(Ncpz, Config),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cpznn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cpznn]),
+    ?line wait_for_ready_net(),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % stop the nodes, and make sure names are released.
+    stop_node(Cp1),
+    stop_node(Cp2),
+    stop_node(Cp3),
+    stop_node(Cpx),
+    stop_node(Cpy),
+    stop_node(Cpz),
+
+    ?line ?UNTIL(undefined =:= global:whereis_name(test)),
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+
+
+compatible(suite) -> [];
+compatible(doc) -> 
+    ["Check that a system without global groups is compatible with the old R4 system."];
+compatible(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(200)),
+
+    ?line Dir = ?config(priv_dir, Config),
+    ?line File = filename:join(Dir, "global_group_comp.config"),
+    ?line {ok, Fd} = file:open(File, write),
+
+    [Ncp1,Ncp2,Ncp3,Ncpx,Ncpy,Ncpz] = 
+        node_names([cp1,cp2,cp3,cpx,cpy,cpz], Config),
+    ?line config_comp(Fd, Ncp1, Ncp2, Ncp3, Ncpx, Ncpy, Ncpz),
+
+    ?line Cp1nn = node_at(Ncp1),
+    ?line Cp2nn = node_at(Ncp2),
+    ?line Cp3nn = node_at(Ncp3),
+    ?line Cpxnn = node_at(Ncpx),
+    ?line Cpynn = node_at(Ncpy),
+    ?line Cpznn = node_at(Ncpz),
+
+    ?line {ok, Cp1} = start_node_comp(Ncp1, Config),
+    ?line {ok, Cp2} = start_node_comp(Ncp2, Config),
+    ?line {ok, Cp3} = start_node_comp(Ncp3, Config),
+    ?line {ok, Cpx} = start_node_comp(Ncpx, Config),
+    ?line {ok, Cpy} = start_node_comp(Ncpy, Config),
+    ?line {ok, Cpz} = start_node_comp(Ncpz, Config),
+
+    %% let the nodes know of each other
+    ?line pong = rpc:call(Cp1, net_adm, ping, [Cp2nn]),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cp3nn]),
+    ?line pong = rpc:call(Cp3, net_adm, ping, [Cpxnn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cpynn]),
+    ?line pong = rpc:call(Cpy, net_adm, ping, [Cpznn]),
+
+    ?line wait_for_ready_net(),
+
+    ?line [test_server] = rpc:call(Cp1, global_group, registered_names, [{node, Cp1nn}]),
+    ?line [test_server] = rpc:call(Cp2, global_group, registered_names, [{node, Cp2nn}]),
+    ?line [test_server] = rpc:call(Cp3, global_group, registered_names, [{node, Cp3nn}]),
+    ?line [test_server] = rpc:call(Cp1, global_group, registered_names, [{node, Cpxnn}]),
+    ?line [test_server] = rpc:call(Cp2, global_group, registered_names, [{node, Cpynn}]),
+    ?line [test_server] = rpc:call(Cp3, global_group, registered_names, [{node, Cpznn}]),
+
+
+    % start a proc and register it
+    ?line {Pid2, yes} = rpc:call(Cp2, ?MODULE, start_proc, [test2]),
+
+    ?line RegNames = lists:sort([test2,test_server]),
+
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp1, global_group, registered_names, [{node, Cp1nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp2, global_group, registered_names, [{node, Cp2nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp3, global_group, registered_names, [{node, Cp3nn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp1, global_group, registered_names, [{node, Cpxnn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp2, global_group, registered_names, [{node, Cpynn}])),
+    ?line RegNames = 
+	lists:sort(
+	  rpc:call(Cp3, global_group, registered_names, [{node, Cpznn}])),
+
+
+    ?line undefined = rpc:call(Cp3, global_group, global_groups, []),
+
+    ?line Own_nodes_should = [node(), Cp1nn, Cp2nn, Cp3nn, 
+			      Cpxnn, Cpynn, Cpznn],
+    ?line Own_nodes = rpc:call(Cp3, global_group, own_nodes, []), 
+    ?line true = (Own_nodes -- Own_nodes_should) =:= [],
+    ?line true = (Own_nodes_should -- Own_nodes) =:= [],
+    
+    ?line Pid2 = rpc:call(Cp1, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout2)
+				 end,
+    ?line Pid2 = rpc:call(Cp2, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout3)
+				 end,
+    ?line Pid2 = rpc:call(Cpz, global_group, send, [test2, {ping, self()}]),
+    ?line receive
+	      {pong, Cp2} -> ok
+				 after
+				     2000 -> test_server:fail(timeout4)
+				 end,
+
+
+    % start a proc and register it
+    ?line {PidX, yes} = rpc:call(Cpx, ?MODULE, start_proc, [test]),
+
+
+    %%------------------------------------
+    %% Test monitor nodes
+    %%------------------------------------
+    ?line Pid2 = rpc:call(Cp1, global_group, send, [{node, Cp2nn}, test2, monitor]),
+    ?line PidX = rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, monitor]),
+
+
+    % Kill node Cp1
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodedown, Cp1}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodedown, Cp1}]),
+    ?line test_server:sleep(100),
+    ?line stop_node(Cp1),
+    ?line test_server:sleep(1000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Kill node Cpz
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodedown, Cpz}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodedown, Cpz}]),
+    ?line test_server:sleep(100),
+    ?line stop_node(Cpz),
+    ?line test_server:sleep(1000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Restart node Cp1
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodeup, Cp1}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodeup, Cp1}]),
+    ?line {ok, Cp1} = start_node_comp(Ncp1, Config),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cp1nn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cp1nn]),
+    ?line wait_for_ready_net(),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % Restart node Cpz
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, {wait_nodeup, Cpz}]),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, {wait_nodeup, Cpz}]),
+    ?line {ok, Cpz} = start_node_comp(Ncpz, Config),
+    ?line pong = rpc:call(Cp2, net_adm, ping, [Cpznn]),
+    ?line pong = rpc:call(Cpx, net_adm, ping, [Cpznn]),
+    ?line wait_for_ready_net(),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+
+    % stop the nodes, and make sure names are released.
+    stop_node(Cp1),
+    stop_node(Cp2),
+    stop_node(Cp3),
+    stop_node(Cpx),
+    stop_node(Cpy),
+    stop_node(Cpz),
+
+    ?line ?UNTIL(undefined =:= global:whereis_name(test)),
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+
+
+one_grp(suite) -> [];
+one_grp(doc) -> ["Test a system with only one global group. "];
+one_grp(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(120)),
+
+    ?line Dir = ?config(priv_dir, Config),
+    ?line File = filename:join(Dir, "global_group.config"),
+    ?line {ok, Fd} = file:open(File, write),
+    [Ncp1,Ncp2,Ncp3] = node_names([cp1, cp2, cp3], Config),
+    ?line config(Fd, Ncp1, Ncp2, Ncp3, "cpx", "cpy", "cpz", "cpq"),
+
+    ?line {ok, Cp1} = start_node(Ncp1, Config),
+    ?line {ok, Cp2} = start_node(Ncp2, Config),
+    ?line {ok, Cp3} = start_node(Ncp3, Config),
+
+    % sleep a while to make the global_group to sync...
+    test_server:sleep(1000),
+
+    % start a proc and register it
+    ?line {Pid, yes} = rpc:call(Cp1, ?MODULE, start_proc, [test]),
+
+    % test that it is registered at all nodes
+    ?line Pid = rpc:call(Cp1, global, whereis_name, [test]),
+    ?line Pid = rpc:call(Cp2, global, whereis_name, [test]),
+    ?line Pid = rpc:call(Cp3, global, whereis_name, [test]),
+    
+    % try to register the same name
+    ?line no = rpc:call(Cp1, global, register_name, [test, self()]),
+    
+    % let process exit, check that it is unregistered automatically
+    Pid ! die,
+    ?line 
+    ?UNTIL(begin
+               (undefined =:= rpc:call(Cp1, global, whereis_name, [test])) and
+               (undefined =:= rpc:call(Cp2, global, whereis_name, [test])) and
+               (undefined =:= rpc:call(Cp3, global, whereis_name, [test]))
+           end),
+    
+    % test re_register
+    ?line {Pid2, yes} = rpc:call(Cp1, ?MODULE, start_proc, [test]),
+    ?line Pid2 = rpc:call(Cp3, global, whereis_name, [test]),    
+    Pid3 = rpc:call(Cp3, ?MODULE, start_proc_rereg, [test]),
+    ?line Pid3 = rpc:call(Cp3, global, whereis_name, [test]),        
+
+    % test sending
+    rpc:call(Cp1, global, send, [test, {ping, self()}]),
+    receive
+	{pong, Cp3} -> ok
+    after
+	2000 -> test_server:fail(timeout1)
+    end,
+
+    rpc:call(Cp3, global, send, [test, {ping, self()}]),
+    receive
+	{pong, Cp3} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+
+    ?line rpc:call(Cp3, global, unregister_name, [test]),    
+    ?line undefined = rpc:call(Cp1, global, whereis_name, [test]),
+    ?line undefined = rpc:call(Cp2, global, whereis_name, [test]),
+    ?line undefined = rpc:call(Cp3, global, whereis_name, [test]),
+
+    Pid3 ! die,
+    ?line ?UNTIL(undefined =:= rpc:call(Cp3, global, whereis_name, [test])),
+
+    % register a proc
+    ?line {_, yes} = rpc:call(Cp3, ?MODULE, start_proc, [test]),
+
+    % stop the nodes, and make sure names are released.
+    stop_node(Cp3),
+
+    ?line ?UNTIL(undefined =:= rpc:call(Cp1, global, whereis_name, [test])),
+    Pid2 ! die,
+
+    stop_node(Cp1),
+    stop_node(Cp2),
+
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+
+
+
+one_grp_x(suite) -> [];
+one_grp_x(doc) -> ["Check a system with only one global group. "
+		   "Start the nodes with different time intervals. "];
+one_grp_x(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(120)),
+
+    ?line Dir = ?config(priv_dir, Config),
+    ?line File = filename:join(Dir, "global_group.config"),
+    ?line {ok, Fd} = file:open(File, write),
+    [Ncp1,Ncp2,Ncp3] = node_names([cp1, cp2, cp3], Config),
+    ?line config(Fd, Ncp1, Ncp2, Ncp3, "cpx", "cpy", "cpz", "cpq"),
+
+    ?line {ok, Cp1} = start_node(Ncp1, Config),
+    % sleep a while to make the global_group to sync...
+    test_server:sleep(1000),
+
+    % start a proc and register it
+    ?line {Pid, yes} = rpc:call(Cp1, ?MODULE, start_proc, [test]),
+
+    ?line {ok, Cp2} = start_node(Ncp2, Config),
+    % sleep a while to make the global_group to sync...
+    test_server:sleep(1000),
+
+    % test that it is registered at all nodes
+    ?line Pid = rpc:call(Cp1, global, whereis_name, [test]),
+    ?line Pid = rpc:call(Cp2, global, whereis_name, [test]),
+
+    ?line {ok, Cp3} = start_node(Ncp3, Config),
+    % sleep a while to make the global_group to sync...
+    test_server:sleep(1000),
+
+    ?line Pid = rpc:call(Cp3, global, whereis_name, [test]),
+    
+    % try to register the same name
+    ?line no = rpc:call(Cp1, global, register_name, [test, self()]),
+    
+    % let process exit, check that it is unregistered automatically
+    Pid ! die,
+    ?line 
+    ?UNTIL(begin
+               (undefined =:= rpc:call(Cp1, global, whereis_name, [test])) and
+               (undefined =:= rpc:call(Cp2, global, whereis_name, [test])) and
+               (undefined =:= rpc:call(Cp3, global, whereis_name, [test]))
+           end),
+    
+    % test re_register
+    ?line {Pid2, yes} = rpc:call(Cp1, ?MODULE, start_proc, [test]),
+    ?line Pid2 = rpc:call(Cp3, global, whereis_name, [test]),    
+
+    Pid2 ! die,
+
+    stop_node(Cp1),
+    stop_node(Cp2),
+    stop_node(Cp3),
+
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+
+
+
+
+two_grp(suite) -> [];
+two_grp(doc) -> ["Test a two global group system. "];
+two_grp(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(200)),
+
+    ?line Dir = ?config(priv_dir, Config),
+    ?line File = filename:join(Dir, "global_group.config"),
+    ?line {ok, Fd} = file:open(File, write),
+
+    [Ncp1,Ncp2,Ncp3,Ncpx,Ncpy,Ncpz,Ncpq] = 
+        node_names([cp1,cp2,cp3,cpx,cpy,cpz,cpq], Config),
+    ?line config(Fd, Ncp1, Ncp2, Ncp3, Ncpx, Ncpy, Ncpz, Ncpq),
+
+    ?line Cp1nn = node_at(Ncp1),
+    ?line Cp2nn = node_at(Ncp2),
+    ?line Cp3nn = node_at(Ncp3),
+    ?line Cpxnn = node_at(Ncpx),
+    ?line Cpynn = node_at(Ncpy),
+    ?line Cpznn = node_at(Ncpz),
+
+    ?line {ok, Cp1} = start_node(Ncp1, Config),
+    ?line {ok, Cp2} = start_node(Ncp2, Config),
+    ?line {ok, Cp3} = start_node(Ncp3, Config),
+    ?line {ok, Cpx} = start_node(Ncpx, Config),
+    ?line {ok, Cpy} = start_node(Ncpy, Config),
+    ?line {ok, Cpz} = start_node(Ncpz, Config),
+
+    %% The groups (cpq not started):
+    %% [{nc1, [cp1,cp2,cp3]}, {nc2, [cpx,cpy,cpz]}, {nc3, [cpq]}]
+
+    % sleep a while to make the global_groups to sync...
+    test_server:sleep(1000),
+
+    % check the global group names
+    ?line {nc1, [nc2, nc3]} = rpc:call(Cp1, global_group, global_groups, []),
+    ?line {nc1, [nc2, nc3]} = rpc:call(Cp2, global_group, global_groups, []),
+    ?line {nc1, [nc2, nc3]} = rpc:call(Cp3, global_group, global_groups, []),
+    ?line {nc2, [nc1, nc3]} = rpc:call(Cpx, global_group, global_groups, []),
+    ?line {nc2, [nc1, nc3]} = rpc:call(Cpy, global_group, global_groups, []),
+    ?line {nc2, [nc1, nc3]} = rpc:call(Cpz, global_group, global_groups, []),
+
+    % check the global group nodes
+    ?line [Cp1nn, Cp2nn, Cp3nn] = rpc:call(Cp1, global_group, own_nodes, []),
+    ?line [Cp1nn, Cp2nn, Cp3nn] = rpc:call(Cp2, global_group, own_nodes, []),
+    ?line [Cp1nn, Cp2nn, Cp3nn] = rpc:call(Cp3, global_group, own_nodes, []),
+    ?line [Cpxnn, Cpynn, Cpznn] = rpc:call(Cpx, global_group, own_nodes, []),
+    ?line [Cpxnn, Cpynn, Cpznn] = rpc:call(Cpy, global_group, own_nodes, []),
+    ?line [Cpxnn, Cpynn, Cpznn] = rpc:call(Cpz, global_group, own_nodes, []),
+
+
+    % start a proc and register it
+    ?line {Pid1, yes} = rpc:call(Cp1, ?MODULE, start_proc, [test]),
+
+    ?line Pid1 = rpc:call(Cp1, global_group, send, [test, {io, from_cp1}]),
+    ?line Pid1 = rpc:call(Cpx, global_group, send, [test, {io, from_cpx}]),
+    ?line Pid1 = rpc:call(Cp1, global_group, send, [{group,nc1}, test, 
+                                                    {io, from_cp1}]),
+    ?line [test] = 
+        rpc:call(Cpx, global_group, registered_names, [{node, Cp1nn}]),
+    ?line [test] = 
+        rpc:call(Cpx, global_group, registered_names, [{group, nc1}]),
+    ?line [] = rpc:call(Cpx, global_group, registered_names, [{node, Cpxnn}]),
+    ?line [] = rpc:call(Cpx, global_group, registered_names, [{group, nc2}]),
+    ?line Pid1 = rpc:call(Cpx, global_group, send, [{group,nc1}, test, 
+                                                    {io, from_cp1}]),
+    ?line {badarg,{test,{io,from_cpx}}} = 
+	rpc:call(Cp1, global_group, send, [{group,nc2}, test, {io, from_cpx}]),
+    ?line {badarg,{test,{io,from_cpx}}} = 
+	rpc:call(Cpx, global_group, send, [{group,nc2}, test, {io, from_cpx}]),
+
+
+
+    % test that it is registered at all nodes
+    ?line Pid1 = rpc:call(Cp1, global, whereis_name, [test]),
+    ?line Pid1 = rpc:call(Cp2, global, whereis_name, [test]),
+    ?line Pid1 = rpc:call(Cp3, global, whereis_name, [test]),
+    ?line undefined = rpc:call(Cpx, global, whereis_name, [test]),
+    ?line undefined = rpc:call(Cpy, global, whereis_name, [test]),
+    ?line undefined = rpc:call(Cpz, global, whereis_name, [test]),
+    
+    % start a proc and register it
+    ?line {PidX, yes} = rpc:call(Cpx, ?MODULE, start_proc, [test]),
+
+    % test that it is registered at all nodes
+    ?line Pid1 = rpc:call(Cp1, global, whereis_name, [test]),
+    ?line Pid1 = rpc:call(Cp2, global, whereis_name, [test]),
+    ?line Pid1 = rpc:call(Cp3, global, whereis_name, [test]),
+    ?line PidX = rpc:call(Cpx, global, whereis_name, [test]),
+    ?line PidX = rpc:call(Cpy, global, whereis_name, [test]),
+    ?line PidX = rpc:call(Cpz, global, whereis_name, [test]),
+    
+    Pid1 ! die,
+    %% If we don't wait for global on other nodes to have updated its
+    %% tables, 'test' may still be defined at the point when it is
+    %% tested a few lines below.
+    ?line
+    ?UNTIL(begin 
+               Pid = rpc:call(Cp2, global, whereis_name, [test]),
+               undefined =:= Pid
+           end),
+
+    % start a proc and register it
+    ?line {Pid2, yes} = rpc:call(Cp2, ?MODULE, start_proc, [test2]),
+
+    % test that it is registered at all nodes
+    ?line Pid2 = rpc:call(Cp1, global, whereis_name, [test2]),
+    ?line Pid2 = rpc:call(Cp2, global, whereis_name, [test2]),
+    ?line Pid2 = rpc:call(Cp3, global, whereis_name, [test2]),
+    ?line PidX = rpc:call(Cpx, global, whereis_name, [test]),
+    ?line PidX = rpc:call(Cpy, global, whereis_name, [test]),
+    ?line PidX = rpc:call(Cpz, global, whereis_name, [test]),
+    
+    ?line undefined = rpc:call(Cp1, global, whereis_name, [test]),
+    ?line undefined = rpc:call(Cp2, global, whereis_name, [test]),
+    ?line undefined = rpc:call(Cp3, global, whereis_name, [test]),
+    ?line undefined = rpc:call(Cpx, global, whereis_name, [test2]),
+    ?line undefined = rpc:call(Cpy, global, whereis_name, [test2]),
+    ?line undefined = rpc:call(Cpz, global, whereis_name, [test2]),
+    
+
+    ?line Pid2 = rpc:call(Cp1, global_group, send, [test2, {ping, self()}]),
+    receive
+	{pong, Cp2} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line Pid2 = rpc:call(Cp2, global_group, send, [test2, {ping, self()}]),
+    receive
+	{pong, Cp2} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line Pid2 = rpc:call(Cp3, global_group, send, [test2, {ping, self()}]),
+    receive
+	{pong, Cp2} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+
+    ?line PidX = rpc:call(Cpx, global_group, send, [test, {ping, self()}]),
+    receive
+	{pong, Cpx} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line PidX = rpc:call(Cpy, global_group, send, [test, {ping, self()}]),
+    receive
+	{pong, Cpx} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line PidX = rpc:call(Cpz, global_group, send, [test, {ping, self()}]),
+    receive
+	{pong, Cpx} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+
+    ?line Pid2 = rpc:call(Cpx, global_group, send, [{node, Cp1nn}, test2, 
+                                                    {ping, self()}]),
+    receive
+	{pong, Cp2} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line Pid2 = rpc:call(Cpy, global_group, send, [{node, Cp2nn}, test2, 
+                                                    {ping, self()}]),
+    receive
+	{pong, Cp2} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line Pid2 = rpc:call(Cpz, global_group, send, [{node, Cp3nn}, test2, 
+                                                    {ping, self()}]),
+    receive
+	{pong, Cp2} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+
+    ?line PidX = rpc:call(Cpx, global_group, send, [{node, Cpznn}, test, 
+                                                    {ping, self()}]),
+    receive
+	{pong, Cpx} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line PidX = rpc:call(Cpy, global_group, send, [{node, Cpxnn}, test, 
+                                                    {ping, self()}]),
+    receive
+	{pong, Cpx} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line PidX = rpc:call(Cpz, global_group, send, [{node, Cpynn}, test, 
+                                                    {ping, self()}]),
+    receive
+	{pong, Cpx} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+
+    ?line Pid2 = rpc:call(Cpx, global_group, send, [{group, nc1}, test2, 
+                                                    {ping, self()}]),
+    receive
+	{pong, Cp2} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+    ?line PidX = rpc:call(Cpy, global_group, send, [{group, nc2}, test, 
+                                                    {ping, self()}]),
+    receive
+	{pong, Cpx} -> ok
+    after
+	2000 -> test_server:fail(timeout2)
+    end,
+
+    %%------------------------------------
+    %% Test monitor nodes
+    %%------------------------------------
+    ?line Pid2 = 
+        rpc:call(Cp1, global_group, send, [{node, Cp2nn}, test2, monitor]),
+    ?line PidX = 
+        rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, monitor]),    
+
+
+    % Kill node Cp1
+    ?line Pid2 = rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, 
+                                                    {wait_nodedown, Cp1}]),
+    ?line PidX = rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, 
+                                                    {wait_nodedown, Cp1}]),
+    ?line test_server:sleep(100),
+    ?line stop_node(Cp1),
+    ?line test_server:sleep(1000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop_nodedown),
+    ?line  PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, to_loop]),
+
+    % Kill node Cpz
+    ?line Pid2 = rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, 
+                                                    {wait_nodedown, Cpz}]),
+    ?line PidX = rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, 
+                                                    {wait_nodedown, Cpz}]),
+    ?line test_server:sleep(100),
+    ?line stop_node(Cpz),
+    ?line test_server:sleep(1000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop_nodedown),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, to_loop]),
+
+    % Restart node Cp1
+    ?line [Cp1nn, Cp2nn, Cp3nn] = rpc:call(Cp2, global_group, own_nodes, []),
+    ?line Pid2 = rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, 
+                                                    {wait_nodeup, Cp1}]),
+    ?line PidX = rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, 
+                                                    {wait_nodeup, Cp1}]),
+    ?line test_server:sleep(100),
+    ?line {ok, Cp1} = start_node(Ncp1, Config),
+    ?line test_server:sleep(5000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop_nodeup),
+    ?line PidX = 
+	rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, to_loop]),
+
+
+    % Restart node Cpz
+    ?line Pid2 = rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, 
+                                                    {wait_nodeup, Cpz}]),
+    ?line PidX = rpc:call(Cpx, global_group, send, [{node, Cpxnn}, test, 
+                                                    {wait_nodeup, Cpz}]),
+    ?line test_server:sleep(100),
+    ?line {ok, Cpz} = start_node(Ncpz, Config),
+    ?line test_server:sleep(5000),
+    
+    ?line ok = assert_loop(Cp2, Cp2nn, test2, Pid2, loop_nodeup),
+    ?line ok = assert_loop(Cpx, Cpxnn, test, PidX, loop),
+    ?line Pid2 = 
+	rpc:call(Cp2, global_group, send, [{node, Cp2nn}, test2, to_loop]),
+
+
+    Pid2 ! die,
+    PidX ! die,
+
+    stop_node(Cp1),
+    stop_node(Cp2),
+    stop_node(Cp3),
+    stop_node(Cpx),
+    stop_node(Cpy),
+    stop_node(Cpz),
+
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+
+hidden_groups(suite) -> [];
+hidden_groups(doc) -> ["Test hidden global groups."];
+hidden_groups(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(200)),
+
+    ?line Dir = ?config(priv_dir, Config),
+    ?line File = filename:join(Dir, "global_group.config"),
+    ?line {ok, Fd} = file:open(File, write),
+
+    [Ncp1,Ncp2,Ncp3,Ncpx,Ncpy,Ncpz,Ncpq] = 
+        node_names([cp1,cp2,cp3,cpx,cpy,cpz,cpq], Config),
+    ?line config_hidden(Fd, Ncp1, Ncp2, Ncp3, Ncpx, Ncpy, Ncpz, Ncpq),
+
+    ?line {ok, Cp1} = start_node(Ncp1, Config),
+    ?line {ok, Cp2} = start_node(Ncp2, Config),
+    ?line {ok, Cp3} = start_node(Ncp3, Config),
+    ?line {ok, Cpx} = start_node(Ncpx, Config),
+    ?line {ok, Cpy} = start_node(Ncpy, Config),
+    ?line {ok, Cpz} = start_node(Ncpz, Config),
+    ?line {ok, Cpq} = start_node(Ncpq, Config),
+
+    % sleep a while to make the global_groups to sync...
+    test_server:sleep(1000),
+
+    % check the global group names
+    ?line {nc1, [nc2, nc3]} = rpc:call(Cp1, global_group, global_groups, []),
+    ?line {nc1, [nc2, nc3]} = rpc:call(Cp2, global_group, global_groups, []),
+    ?line {nc1, [nc2, nc3]} = rpc:call(Cp3, global_group, global_groups, []),
+    ?line {nc2, [nc1, nc3]} = rpc:call(Cpx, global_group, global_groups, []),
+    ?line {nc2, [nc1, nc3]} = rpc:call(Cpy, global_group, global_groups, []),
+    ?line {nc2, [nc1, nc3]} = rpc:call(Cpz, global_group, global_groups, []),
+
+    % check the global group nodes
+    ?line [Cp1, Cp2, Cp3] = rpc:call(Cp1, global_group, own_nodes, []),
+    ?line [Cp1, Cp2, Cp3] = rpc:call(Cp2, global_group, own_nodes, []),
+    ?line [Cp1, Cp2, Cp3] = rpc:call(Cp3, global_group, own_nodes, []),
+    ?line [Cpx, Cpy, Cpz] = rpc:call(Cpx, global_group, own_nodes, []),
+    ?line [Cpx, Cpy, Cpz] = rpc:call(Cpy, global_group, own_nodes, []),
+    ?line [Cpx, Cpy, Cpz] = rpc:call(Cpz, global_group, own_nodes, []),
+    ?line [Cpq]           = rpc:call(Cpq, global_group, own_nodes, []),
+
+    % Make some inter group connections
+    ?line pong = rpc:call(Cp1, net_adm, ping, [Cpx]),
+    ?line pong = rpc:call(Cpy, net_adm, ping, [Cp2]),
+    ?line pong = rpc:call(Cp3, net_adm, ping, [Cpx]),
+    ?line pong = rpc:call(Cpz, net_adm, ping, [Cp3]),
+    ?line pong = rpc:call(Cpq, net_adm, ping, [Cp1]),
+    ?line pong = rpc:call(Cpz, net_adm, ping, [Cpq]),
+
+    % Check that no inter group connections are visible
+    NC1Nodes = lists:sort([Cp1, Cp2, Cp3]),
+    NC2Nodes = lists:sort([Cpx, Cpy, Cpz]),
+    ?line NC1Nodes = lists:sort([Cp1|rpc:call(Cp1, erlang, nodes, [])]),
+    ?line NC1Nodes = lists:sort([Cp2|rpc:call(Cp2, erlang, nodes, [])]),
+    ?line NC1Nodes = lists:sort([Cp3|rpc:call(Cp3, erlang, nodes, [])]),
+    ?line NC2Nodes = lists:sort([Cpx|rpc:call(Cpx, erlang, nodes, [])]),
+    ?line NC2Nodes = lists:sort([Cpy|rpc:call(Cpy, erlang, nodes, [])]),
+    ?line NC2Nodes = lists:sort([Cpz|rpc:call(Cpz, erlang, nodes, [])]),
+    NC12Nodes = lists:append(NC1Nodes, NC2Nodes),
+    ?line false = lists:any(fun(N) -> lists:member(N, NC12Nodes) end,
+			    rpc:call(Cpq, erlang, nodes, [])),
+
+
+    stop_node(Cp1),
+    stop_node(Cp2),
+    stop_node(Cp3),
+    stop_node(Cpx),
+    stop_node(Cpy),
+    stop_node(Cpz),
+    stop_node(Cpq),
+
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+test_exit(suite) -> [];
+test_exit(doc) -> ["Checks when the search process exits. "];
+test_exit(Config) when list(Config) ->
+    ?line Dog = test_server:timetrap(test_server:seconds(120)),
+
+    ?line NN = node_name(atom_to_list(node())),
+    ?line Cp1nn = list_to_atom("cp1@" ++ NN),
+
+    ?line {ok, Cp1} = start_node(cp1, Config),
+    ?line {ok, Cp2} = start_node(cp2, Config),
+    ?line {ok, Cp3} = start_node(cp3, Config),
+
+    test_server:sleep(1000),
+
+    ?line {error, illegal_function_call} = 
+        rpc:call(Cp1, global_group, registered_names_test, [{node, Cp1nn}]),
+    ?line {badarg,_} = 
+        rpc:call(Cp1, global_group, send, [king, "The message"]),
+    ?line undefined = rpc:call(Cp1, global_group, whereis_name, [king]),
+
+    % stop the nodes, and make sure names are released.
+    stop_node(Cp1),
+    stop_node(Cp2),
+    stop_node(Cp3),
+
+    % sleep to let the nodes die
+    test_server:sleep(1000),
+
+    ?line test_server:timetrap_cancel(Dog),
+    ok.
+    
+
+start_node(Name, Config) ->
+    Pa=filename:dirname(code:which(?MODULE)),
+    Dir=?config(priv_dir, Config),
+    ConfFile = "  -config " ++ filename:join(Dir, "global_group"),
+    test_server:start_node(Name, slave, [{args, "-pa " ++ Pa ++ ConfFile}]).
+
+start_node_no(Name, Config) ->
+    Pa=filename:dirname(code:which(?MODULE)),
+    Dir=?config(priv_dir, Config),
+    ConfFile = "  -config " ++ filename:join(Dir, "no_global_group"),
+    test_server:start_node(Name, slave, [{args, "-pa " ++ Pa ++ ConfFile}]).
+
+start_node_no2(Name, Config) ->
+    Pa=filename:dirname(code:which(?MODULE)),
+    Dir=?config(priv_dir, Config),
+    ConfFile = "  -config " ++ filename:join(Dir, "no_global_group_sync"),
+    test_server:start_node(Name, slave, [{args, "-pa " ++ Pa ++ ConfFile}]).
+
+start_node_comp(Name, Config) ->
+    Pa=filename:dirname(code:which(?MODULE)),
+    Dir=?config(priv_dir, Config),
+    ConfFile = "  -config " ++ filename:join(Dir, "global_group_comp"),
+    test_server:start_node(Name, slave, [{args, "-pa " ++ Pa ++ ConfFile}]).
+
+node_names(Names, Config) ->
+    [node_name(Name, Config) || Name <- Names].
+
+node_name(Name, Config) ->
+    U = "_",
+    Pid = os:getpid(),
+    {{Y,M,D}, {H,Min,S}} = calendar:now_to_local_time(now()),
+    Date = io_lib:format("~4w_~2..0w_~2..0w__~2..0w_~2..0w_~2..0w", 
+                         [Y,M,D, H,Min,S]),
+    L = lists:flatten(Date),
+    lists:concat([Name,U,?testcase,U,Pid,U,U,L]).
+
+stop_node(Node) ->
+    ?t:stop_node(Node).
+
+
+wait_for_ready_net() ->
+    Nodes = lists:sort(?NODES),
+    ?UNTIL(begin
+               lists:all(fun(N) -> Nodes =:= get_known(N) end, Nodes) and
+               lists:all(fun(N) -> 
+                                 LNs = rpc:call(N, erlang, nodes, []),
+                                 Nodes =:= lists:sort([N | LNs])
+                         end, Nodes)
+           end).
+
+get_known(Node) ->
+    Known = gen_server:call({global_name_server,Node}, get_known),
+    lists:sort([Node | Known]).
+
+config_hidden(Fd, Ncp1, Ncp2, Ncp3, Ncpx, Ncpy, Ncpz, Ncpq) ->
+    M = from($@, atom_to_list(node())),
+    io:format(Fd, "[{kernel, [{sync_nodes_optional, ['~s@~s','~s@~s','~s@~s', "
+                                                   " '~s@~s','~s@~s','~s@~s']},"
+	                     "{sync_nodes_timeout, 1000},"
+                             "{global_groups, [{nc1, hidden, ['~s@~s','~s@~s','~s@~s']}, "
+                                              "{nc2, hidden, ['~s@~s','~s@~s','~s@~s']}, "
+	                                      "{nc3, normal, ['~s@~s']}]} ] }]. ~n",
+	      [Ncp1, M, Ncp2, M, Ncp3, M,  
+               Ncpx, M, Ncpy, M, Ncpz, M, 
+               Ncp1, M, Ncp2, M, Ncp3, M,  
+               Ncpx, M, Ncpy, M, Ncpz, M, 
+               Ncpq, M]).
+
+config(Fd, Ncp1, Ncp2, Ncp3, Ncpx, Ncpy, Ncpz, Ncpq) ->
+    M = from($@, atom_to_list(node())),
+    io:format(Fd, "[{kernel, [{sync_nodes_optional, ['~s@~s','~s@~s','~s@~s', "
+                                                   " '~s@~s','~s@~s','~s@~s']},"
+	          "{sync_nodes_timeout, 1000},"
+                  "{global_groups, [{nc1, ['~s@~s','~s@~s','~s@~s']}, "
+                                " {nc2, ['~s@~s','~s@~s','~s@~s']}, "
+	                         "{nc3, ['~s@~s']}]} ] }]. ~n",
+	      [Ncp1, M, Ncp2, M, Ncp3, M,  
+               Ncpx, M, Ncpy, M, Ncpz, M, 
+               Ncp1, M, Ncp2, M, Ncp3, M,  
+               Ncpx, M, Ncpy, M, Ncpz, M, 
+               Ncpq, M]).
+
+config_no(Fd) ->
+    io:format(Fd, "[{kernel, [{global_groups, []}]}]. ~n",[]).
+
+config_sync(Fd, Ncp1, Ncp2, Ncp3, Ncpx, Ncpy, Ncpz) ->
+    M = from($@, atom_to_list(node())),
+    io:format(Fd, "[{kernel, [{sync_nodes_optional, ['~s@~s','~s@~s','~s@~s', "
+                                                   " '~s@~s','~s@~s','~s@~s']},"
+	          "{sync_nodes_timeout, 1000},"
+                  "{global_groups, []} ] }] .~n",
+	      [Ncp1, M, Ncp2, M, Ncp3, M,  
+               Ncpx, M, Ncpy, M, Ncpz, M]).
+
+
+config_comp(Fd, Ncp1, Ncp2, Ncp3, Ncpx, Ncpy, Ncpz) ->
+    M = from($@, atom_to_list(node())),
+    io:format(Fd, "[{kernel, [{sync_nodes_optional, ['~s@~s','~s@~s','~s@~s', "
+                                                   " '~s@~s','~s@~s','~s@~s']},"
+	          "{sync_nodes_timeout, 1000} ] }] .~n",
+	      [Ncp1, M, Ncp2, M, Ncp3, M,  
+               Ncpx, M, Ncpy, M, Ncpz, M]).
+
+node_at(N) ->
+    NN = node_name(atom_to_list(node())),
+    list_to_atom(lists:concat([N, "@", NN])).
+
+node_name(L) ->
+    from($@, L).
+
+from(H, [H | T]) -> T;
+from(H, [_ | T]) -> from(H, T);
+from(_, []) -> [].
+
+
+start_proc(Name) ->
+    Pid = spawn(?MODULE, init, [self(), Name]),
+    receive
+	{Pid, Res} -> {Pid, Res}
+    end.
+    
+start_proc_rereg(Name) ->
+    Pid = spawn(?MODULE, init2, [self(), Name]),
+    receive
+	Pid -> Pid
+    end.
+
+
+
+
+
+
+
+init(Parent) ->
+    Parent ! self(),
+    loop().
+
+init(Parent, Name) ->
+    X = global:register_name(Name, self()),
+    Parent ! {self(),X},
+    loop().
+
+init2(Parent, Name) ->
+    global:re_register_name(Name, self()),
+    Parent ! self(),
+    loop().
+
+loop() ->
+    receive
+	monitor ->
+	    global_group:monitor_nodes(true),
+	    loop();
+	stop_monitor ->
+	    global_group:monitor_nodes(false),
+	    loop();
+	{wait_nodeup, Node} ->
+	    loop_nodeup(Node);
+	{wait_nodedown, Node} ->
+	    loop_nodedown(Node);
+	{io, _Msg} ->
+	    loop();
+	{ping, From} ->
+	    From ! {pong, node()},
+	    loop();
+	{del_lock, Id} ->
+	    global:del_lock({Id, self()}),
+	    loop();
+	{del_lock, Id, Nodes} ->
+	    global:del_lock({Id, self()}, Nodes),
+	    loop();
+	{set_lock, Id, From} ->
+	    Res = global:set_lock({Id, self()}, ?NODES, 1),
+	    From ! Res,
+	    loop();
+	{set_lock, Id, From, Nodes} ->
+	    Res = global:set_lock({Id, self()}, Nodes, 1),
+	    From ! Res,
+	    loop();
+	{set_lock_loop, Id, From} ->
+	    global:set_lock({Id, self()}, ?NODES),
+	    From ! {got_lock, self()},
+	    loop();
+	{{got_notify, From}, Ref} ->
+	    receive
+		X when element(1, X) == global_name_conflict ->
+		    From ! {Ref, yes}
+	    after
+		0 -> From ! {Ref, no}
+	    end,
+	    loop();
+	{which_loop, From} ->
+	    From ! loop,
+	    loop();
+	die ->
+	    exit(normal)
+    end.
+
+
+loop_nodeup(Node) ->
+    receive
+	{nodeup, Node} ->
+	    loop();
+	to_loop ->
+	    loop();
+	{which_loop, From} ->
+	    From ! loop_nodeup,
+	    loop_nodeup(Node);
+	die ->
+	    exit(normal)
+    end.
+
+
+loop_nodedown(Node) ->
+    receive
+	{nodedown, Node} ->
+	    loop();
+	to_loop ->
+	    loop();
+	{which_loop, From} ->
+	    From ! loop_nodedown,
+	    loop_nodedown(Node);
+	die ->
+	    exit(normal)
+    end.
+
+assert_loop(Cp, CpName, Name, NamePid, Loop) ->
+    M = {which_loop, self()},
+    NamePid = rpc:call(Cp, global_group, send, [{node, CpName}, Name, M]),
+    receive
+        Loop ->
+            ok;
+        Other1 ->
+            test_server:fail(Other1)
+    after 5000 ->
+            test_server:fail(timeout)
+    end.
+
+loop_until_true(Fun) ->
+    case Fun() of
+	true ->
+	    ok;
+	_ ->
+	    loop_until_true(Fun)
+    end.
+