让DynamoDB从Erlang中运行

Question

我正在尝试使用Erlang ddb模块与amazon的DynamoDB进行交互，并且在尝试设置时遇到了一个奇怪的错误。我调用ddb_iam：credentials（）并返回'ok'，但ddb_iam：token（）函数崩溃并出现错误:(此示例直接来自手册页。

ddb_iam:credentials(AccessKey, SecretKey).
{ok, Key, Secret, Token} = ddb_iam:token(129600).
** exception error: bad argument
     in function  ets:lookup/2
        called as ets:lookup(ibrowse_lb,{"sts.amazonaws.com",443})
     in call from ibrowse:send_req/6 (src/ibrowse.erl, line 313)
     in call from ddb_aws:retry/4 (src/ddb_aws.erl, line 50)
     in call from ddb_iam:token/1 (src/ddb_iam.erl, line 63)
8> 

Answer 1

听起来ibrowse没有启动：

ibrowse:start().