Question

我在vernemq中启用插件时收到此错误

>>> chr(222)
'\xde'
>>> chr(222).isalpha()
False
>>> 222 < 128
False
>>>

我用来启用插件的命令是：

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]}}}

如果我的PATH变量包含以下路径，那么我没有收到上述错误

vmq-admin plugin enable -n http_to_mqtt -p /Users/sunnyjain/Desktop/http_to_mqtt

但是当我改变路径

时

/Users/sunnyjain/Desktop/vernemq/_build/default/rel/vernemq/bin

然后我收到了错误。有人能告诉我为什么错误即将到来以及“默认”节点的启用插件与“dev1”节点启用它的方式有何不同。插件如何依赖于节点。

Answer 1

此错误即将发生，因为inets应用程序未启动。

要在vernemq中启用inets，您可以键入以下命令

vmq-admin plugin enable -n inets --path /usr/local/lib/erlang/lib/inets-5.10.6

这将删除错误。

无法在Vernemq中启用插件

1 个答案: