###[root@localhost releases]# erl
Erlang R16B03 (erts-5.10.4) [source] [64-bit] [async-threads:10] [hipe] [kernel-poll:false]
Eshell V5.10.4 (abort with ^G)
1> application:start(sasl).
=PROGRESS REPORT==== 23-Jan-2014::12:39:59 ===
supervisor: {local,sasl_safe_sup}
started: [{pid,<0.39.0>},
{name,alarm_handler},
{mfargs,{alarm_handler,start_link,[]}},
{restart_type,permanent},
{shutdown,2000},
{child_type,worker}]
=PROGRESS REPORT==== 23-Jan-2014::12:39:59 ===
supervisor: {local,sasl_safe_sup}
started: [{pid,<0.40.0>},
{name,overload},
{mfargs,{overload,start_link,[]}},
{restart_type,permanent},
{shutdown,2000},
{child_type,worker}]
=PROGRESS REPORT==== 23-Jan-2014::12:39:59 ===
supervisor: {local,sasl_sup}
started: [{pid,<0.38.0>},
{name,sasl_safe_sup},
{mfargs,
{supervisor,start_link,
[{local,sasl_safe_sup},sasl,safe]}},
{restart_type,permanent},
{shutdown,infinity},
{child_type,supervisor}]
=PROGRESS REPORT==== 23-Jan-2014::12:39:59 ===
supervisor: {local,sasl_sup}
started: [{pid,<0.41.0>},
{name,release_handler},
{mfargs,{release_handler,start_link,[]}},
{restart_type,permanent},
{shutdown,2000},
{child_type,worker}]
=PROGRESS REPORT==== 23-Jan-2014::12:39:59 ===
application: sasl
started_at: nonode@nohost
ok
2> release_handler:unpack_release("hidy-1").
{ok,"1"}
3> release_handler:which_releases().
[{"hidy app release","1",
["kernel-2.16.4","stdlib-1.19.4","sasl-2.3.4"],
unpacked},
{"OTP APN 181 01","R16B03",[],permanent}]
4> release_handler:install_release("1").
{error,{enoent,"/usr/erlang/lib/erlang/releases/R16B03/relup"}}
5> application:start(hidy_app).
{error,{"no such file or directory","hidy_app.app"}}
6> release_handler:which_releases().
[{"hidy app release","1",
["kernel-2.16.4","stdlib-1.19.4","sasl-2.3.4"],
unpacked},
{"OTP APN 181 01","R16B03",[],permanent}]
7> q().
ok
======================= ####[root@localhost releases]# erl -boot /usr/erlang/lib/erlang/releases/1/start
Erlang R16B03 (erts-5.10.4) [source] [64-bit] [async-threads:10] [hipe] [kernel-poll:false]
=PROGRESS REPORT==== 23-Jan-2014::14:58:41 ===
supervisor: {local,sasl_safe_sup}
started: [{pid,<0.35.0>},
{name,alarm_handler},
{mfargs,{alarm_handler,start_link,[]}},
{restart_type,permanent},
{shutdown,2000},
{child_type,worker}]
=PROGRESS REPORT==== 23-Jan-2014::14:58:41 ===
supervisor: {local,sasl_safe_sup}
started: [{pid,<0.36.0>},
{name,overload},
{mfargs,{overload,start_link,[]}},
{restart_type,permanent},
{shutdown,2000},
{child_type,worker}]
=PROGRESS REPORT==== 23-Jan-2014::14:58:41 ===
supervisor: {local,sasl_sup}
started: [{pid,<0.34.0>},
{name,sasl_safe_sup},
{mfargs,
{supervisor,start_link,
[{local,sasl_safe_sup},sasl,safe]}},
{restart_type,permanent},
{shutdown,infinity},
{child_type,supervisor}]
=PROGRESS REPORT==== 23-Jan-2014::14:58:41 ===
supervisor: {local,sasl_sup}
started: [{pid,<0.37.0>},
{name,release_handler},
{mfargs,{release_handler,start_link,[]}},
{restart_type,permanent},
{shutdown,2000},
{child_type,worker}]
=PROGRESS REPORT==== 23-Jan-2014::14:58:41 ===
application: sasl
started_at: nonode@nohost
=PROGRESS REPORT==== 23-Jan-2014::14:58:41 ===
supervisor: {local,hidy_sup}
started: [{pid,<0.43.0>},
{name,hidy_server},
{mfargs,{hidy_server,start_link,[]}},
{restart_type,permanent},
{shutdown,10},
{child_type,worker}]
=PROGRESS REPORT==== 23-Jan-2014::14:58:41 ===
application: hidy_app
started_at: nonode@nohost
Eshell V5.10.4 (abort with ^G)
1>release_handler:which_releases().
[{"hidy app release","1",
["kernel-2.16.4","stdlib-1.19.4","sasl-2.3.4","hidy_app-1"],
unpacked},
{"OTP APN 181 01","R16B03",[],permanent}]
2> release_handler:install_release("1").
{error,{enoent,"/usr/erlang/lib/erlang/releases/R16B03/relup"}}
3> release_handler:make_permanent("1").
{error,{bad_status,unpacked}}
4> release_handler:unpack_release("hidy-2").
{ok,"2"}
5> release_handler:install_release("2").
{error,{enoent,"/usr/erlang/lib/erlang/releases/R16B03/relup"}}
6> release_handler:which_releases().
[{"hidy app release","2",
["kernel-2.16.4","stdlib-1.19.4","sasl-2.3.4","hidy_app-2"],
unpacked},
{"hidy app release","1",
["kernel-2.16.4","stdlib-1.19.4","sasl-2.3.4","hidy_app-1"],
unpacked},
{"OTP APN 181 01","R16B03",[],permanent}]
7> release_handler:make_permanent("2").
{error,{bad_status,unpacked}}
8> release_handler:which_releases().
[{"hidy app release","2",
["kernel-2.16.4","stdlib-1.19.4","sasl-2.3.4","hidy_app-2"],
unpacked},
{"hidy app release","1",
["kernel-2.16.4","stdlib-1.19.4","sasl-2.3.4","hidy_app-1"],
unpacked},
{"OTP APN 181 01","R16B03",[],permanent}]
9>q().
ok
========================
{sys, [
{lib_dirs, ["/Users/tuan/Desktop/hidy_release_upgrade"]},
{erts, [{mod_cond, derived},
{app_file, strip}]},
{rel, "hidy", "1",
[kernel, stdlib, sasl, hidy_app]},
{boot_rel, "hidy"},
{relocatable, true},
{profile, embedded},
{app_file, strip},
{incl_cond, exclude},
{excl_app_filters, ["_tests.beam"]},
{excl_archive_filters, [".*"]},
{app, stdlib, [{mod_cond, derived}, {incl_cond, include}]},
{app, kernel, [{incl_cond, include}]},
{app, sasl, [{incl_cond, include}]},
{app, hidy_app, [{vsn, "1"}, {incl_cond, include}]}
]}.
===========================
####最终还是要通过sys.config解决热更新，如果采用erlang systools 进行打包会出现各种上述奇怪问题，而且发布到默认安装的erlang目录下，一切的根源就在这里。