Can not enable Plugin in Vernemq - plugins

Question

I am getting this error while enabling plugin in vernemq
RPC to 'dev1#127.0.0.1' failed: {'EXIT',
{{{badmatch,
{error,
{http_to_mqtt,
{{shutdown,
{failed_to_start_child,
http_to_mqtt_web,
{'EXIT',
{{case_clause,
{error,
{undef,
[{httpd_util,rfc1123_date,[],[]},
{mochiweb_clock,handle_info,2,
[{file,
"src/mochiweb_clock.erl"},
{line,88}]},
{mochiweb_clock,init,1,
[{file,
"src/mochiweb_clock.erl"},
{line,69}]},
{gen_server,init_it,6,
[{file,"gen_server.erl"},
{line,306}]},
{proc_lib,init_p_do_apply,3,
[{file,"proc_lib.erl"},
{line,237}]}]}}},
[{mochiweb_http,ensure_started,1,
[{file,"src/mochiweb_http.erl"},
{line,76}]},
{mochiweb_http,start,1,
[{file,"src/mochiweb_http.erl"},
{line,68}]},
{supervisor,do_start_child,2,
[{file,"supervisor.erl"},
{line,314}]},
{supervisor,start_children,3,
[{file,"supervisor.erl"},
{line,297}]},
{supervisor,init_children,2,
[{file,"supervisor.erl"},
{line,263}]},
{gen_server,init_it,6,
[{file,"gen_server.erl"},
{line,306}]},
{proc_lib,init_p_do_apply,3,
[{file,"proc_lib.erl"},
{line,237}]}]}}}},
{http_to_mqtt_app,start,
[normal,[]]}}}}},
[{vmq_plugin_mgr,start_plugin,1,
[{file,
"/Users/sunnyjain/Desktop/vernemq/_build/default/lib/vmq_plugin/src/vmq_plugin_mgr.erl"},
{line,489}]},
{vmq_plugin_mgr,start_plugins,1,
[{file,
"/Users/sunnyjain/Desktop/vernemq/_build/default/lib/vmq_plugin/src/vmq_plugin_mgr.erl"},
{line,471}]},
{vmq_plugin_mgr,load_plugins,2,
[{file,
"/Users/sunnyjain/Desktop/vernemq/_build/default/lib/vmq_plugin/src/vmq_plugin_mgr.erl"},
{line,410}]},
{vmq_plugin_mgr,update_plugins,2,
[{file,
"/Users/sunnyjain/Desktop/vernemq/_build/default/lib/vmq_plugin/src/vmq_plugin_mgr.erl"},
{line,354}]},
{vmq_plugin_mgr,handle_plugin_call,2,
[{file,
"/Users/sunnyjain/Desktop/vernemq/_build/default/lib/vmq_plugin/src/vmq_plugin_mgr.erl"},
{line,183}]},
{gen_server,try_handle_call,4,
[{file,"gen_server.erl"},{line,607}]},
{gen_server,handle_msg,5,
[{file,"gen_server.erl"},{line,639}]},
{proc_lib,init_p_do_apply,3,
[{file,"proc_lib.erl"},{line,237}]}]},
{gen_server,call,
[vmq_plugin_mgr,
{enable_plugin,http_to_mqtt,
[{paths,
["/Users/sunnyjain/Desktop/practice/http_to_mqtt"]}]},
infinity]}}}
The command I am using to enable plugin is:
vmq-admin plugin enable -n http_to_mqtt -p /Users/sunnyjain/Desktop/http_to_mqtt
If my PATH variable consist the below path then I am not getting the above error
/Users/sunnyjain/Desktop/vernemq/_build/default/rel/vernemq/bin
but when I change path to
/Users/sunnyjain/Desktop/vernemq/_build/dev1/rel/vernemq/bin
then I m getting the error. Can someone tell me why the error is coming and how the enabling plugin from "default" node is different from enabling it from "dev1" node. How is plugin dependent on the nodes.

Answer 1

This error was coming because the inets application is not started.
To enable the inets in vernemq you can type the following commands
vmq-admin plugin enable -n inets --path /usr/local/lib/erlang/lib/inets-5.10.6
This will remove the error.