Amazon s3 ExAws不参与生产发布（Phoenix/Arc/ExAws）

我一直在尝试为阿凡达创建一个上传程序，但我一直面临一些问题，代码在dev上运行得非常好，但在生产版本中，我遇到了以下错误：

=SUPERVISOR REPORT==== 8-Jul-2016::22:35:41 ===
     Supervisor: {local,'Elixir.ExAws.Supervisor'}
     Context:    child_terminated
     Reason:     {#{'__exception__' => true,
                    '__struct__' => 'Elixir.Poison.SyntaxError',
                    message => <<"Unexpected token: <">>,
                    token => <<"<">>},
                  [{'Elixir.Poison.Parser','parse!',2,
                       [{file,"lib/poison/parser.ex"},{line,56}]},
                   {'Elixir.Poison','decode!',2,
                       [{file,"lib/poison.ex"},{line,83}]},
                   {'Elixir.ExAws.InstanceMeta',security_credentials,1,
                       [{file,"lib/ex_aws/instance_meta.ex"},{line,16}]},
                   {'Elixir.ExAws.Config.AuthCache',refresh_config,2,
                       [{file,"lib/ex_aws/config/auth_cache.ex"},{line,37}]},
                   {'Elixir.ExAws.Config.AuthCache',handle_call,3,
                       [{file,"lib/ex_aws/config/auth_cache.ex"},{line,27}]},
                   {gen_server,try_handle_call,4,
                       [{file,"gen_server.erl"},{line,615}]},
                   {gen_server,handle_msg,5,
                       [{file,"gen_server.erl"},{line,647}]},
                   {proc_lib,init_p_do_apply,3,
                       [{file,"proc_lib.erl"},{line,247}]}]}
     Offender:   [{pid,<0.2009.0>},
                  {id,'Elixir.ExAws.Config.AuthCache'},
                  {mfargs,
                      {'Elixir.ExAws.Config.AuthCache',start_link,
                          [[{name,'Elixir.ExAws.Config.AuthCache'}]]}},
                  {restart_type,permanent},
                  {shutdown,5000},
                  {child_type,worker}]

22:35:41.624 [error] Ranch protocol #PID<0.2011.0> (:cowboy_protocol) of listener MyApp.Endpoint.HTTP terminated
** (exit) exited in: GenServer.call(ExAws.Config.AuthCache, {:refresh_config, %ExAws.S3{config: %{access_key_id: [{:system, "AWS_ACCESS_KEY_ID"}, :instance_role], host: %{"ap-northeast-1" => 
"s3-ap-northeast-1.amazonaws.com", "ap-southeast-1" => "s3-ap-southeast-1.amazonaws.com", "ap-southeast-2" => "s3-ap-southeast-2.amazonaws.com", "eu-central-1" => "s3-eu-central-1.amazonaws.c
om", "eu-west-1" => "s3-eu-west-1.amazonaws.com", "sa-east-1" => "s3-sa-east-1.amazonaws.com", "us-east-1" => "s3.amazonaws.com", "us-west-1" => "s3-us-west-1.amazonaws.com", "us-west-2" => "
s3-us-west-2.amazonaws.com"}, http_client: ExAws.Request.HTTPoison, json_codec: Poison, region: "us-east-1", scheme: "https://", secret_access_key: [{:system, "AWS_SECRET_ACCESS_KEY"}, :insta
nce_role]}, service: :s3}}, 5000)
    ** (EXIT) an exception was raised:
        ** (Poison.SyntaxError) Unexpected token: <
            (poison) lib/poison/parser.ex:56: Poison.Parser.parse!/2
            (poison) lib/poison.ex:83: Poison.decode!/2
            (ex_aws) lib/ex_aws/instance_meta.ex:16: ExAws.InstanceMeta.security_credentials/1
            (ex_aws) lib/ex_aws/config/auth_cache.ex:37: ExAws.Config.AuthCache.refresh_config/2
            (ex_aws) lib/ex_aws/config/auth_cache.ex:27: ExAws.Config.AuthCache.handle_call/3
            (stdlib) gen_server.erl:615: :gen_server.try_handle_call/4
            (stdlib) gen_server.erl:647: :gen_server.handle_msg/5
            (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3

=主管报告===2016年7月8日：：22:35:41===
主管：{local，'Elixir.ExAws.Supervisor'}
上下文：child_终止
原因：{{}{“例外情况”=>正确，
“\uuuu结构”=>“长生不老药.毒药.合成错误”，
消息=>,，
令牌=>}，
[{'Elixir.Poison.Parser'，'parse！'，2，
[{file，“lib/poison/parser.ex”}，{line，56}]}，
{'Elixir.Poison'，'decode！'，2，
[{file，“lib/poison.ex”}，{line，83}]}，
{'Elixir.ExAws.InstanceMeta'，安全性凭据，1，
[{file，“lib/ex_aws/instance_meta.ex”}，{line，16}]}，
{'Elixir.ExAws.Config.AuthCache'，刷新配置，2，
[{file，“lib/ex_aws/config/auth_cache.ex”}，{line，37}]}，
{'Elixir.ExAws.Config.AuthCache'，句柄调用，3，
[{file，“lib/ex_aws/config/auth_cache.ex”}，{line，27}]}，
{gen_服务器，尝试处理呼叫，4，
[{file，“gen_server.erl”}，{line，615}]}，
{gen_server，handle_msg，5，
[{file，“gen_server.erl”}，{line，647}]}，
{proc_lib，init_p_do_apply，3，
[{file，“proc_lib.erl”}，{line，247}]}
罪犯：[{pid，}，
{id，'Elixir.ExAws.Config.AuthCache'}，
{mfargs，
{'Elixir.ExAws.Config.AuthCache'，启动链接，
[{name，'Elixir.ExAws.Config.AuthCache'}]}，
{restart_type，permanent}，
{关闭，5000}，
{child_type，worker}]
22:35:41.624[错误]侦听器MyApp.Endpoint.HTTP的Ranch协议#PID（：cowboy_协议）已终止
**（退出）退出于：GenServer.call（ExAws.Config.AuthCache，{：刷新配置，%ExAws.S3{Config:%%{access_key_id:[{：系统，“AWS_access_key_id”}，：实例_角色]，主机：%%{“ap-northeast-1”=>
“s3-ap-northeast-1.amazonaws.com”、“ap-Southwest-1”=>“s3-ap-Southwest-1.amazonaws.com”、“ap-Southwest-2”=>“s3-ap-Southwest-2.amazonaws.com”、“eu-central-1”=>“s3-eu-central-1.amazonaws.c
om、“eu-west-1”=>“s3-eu-west-1.amazonaws.com”、“sa-east-1”=>“s3-sa-east-1.amazonaws.com”、“us-east-1”=>“s3.amazonaws.com”、“us-west-1”=>“s3-us-west-1.amazonaws.com”、“us-west-2”=>”
s3-us-west-2.amazonaws.com“}，http_客户端：ExAws.Request.HTTPoison，json_编解码器：毒药，地区：“us-east-1”，方案：“https://”，秘密访问密钥：[{：系统，“AWS_秘密访问密钥”}，安装
nce_角色]}，服务：：s3}，5000）
**（退出）引发了一个异常：
**（Poison.SyntaxError）意外标记：<
（poison）lib/poison/parser.ex:56:poison.parser.parse/2.
（毒药）lib/毒药。例：83：毒药。解码/2.
（ex_aws）lib/ex_aws/instance_meta.ex:16:ExAws.InstanceMeta.security_credentials/1
（ex_aws）lib/ex_aws/config/auth_cache.ex:37:ExAws.config.AuthCache.refresh_config/2
（ex_aws）lib/ex_aws/config/auth_cache.ex:27:ExAws.config.AuthCache.handle_call/3
（stdlib）gen_server.erl:615:：gen_server.try_handle_call/4
（stdlib）gen_server.erl:647:：gen_server.handle_msg/5
（stdlib）proc_lib.erl:247:：proc_lib.init_p_do_apply/3

---

谢谢。

您的堆栈跟踪显示ExAws使用的dep Poison无法解码json。如果您检查发出该调用的模块（

lib/ex\u aws/instance\u meta.ex

，您可以阅读），您会发现它与Amazon通信以检查您的凭据

最可能的情况是您的配置不正确，Amazon向您发送了一条格式为XML或HTML的错误消息（两者都以

开头）