小编drf*_*nce的帖子

我正在使用:

• Python 3.4.2
• PyMongo 3.0.2
• mongolab运行mongod 2.6.9
• uWSGI 2.0.10
• CherryPy 3.7.0
• nginx 1.6.2

uWSGI启动参数:

--socket 127.0.0.1:8081 --daemonize --enable-threads --threads 2 --processes 2

我设置我的MongoClient ONE时间:

self.mongo_client = MongoClient('mongodb://user:pw@host.mongolab.com:port/mydb')
self.db = self.mongo_client['mydb']

我尝试将一个JSON字典保存到MongoDB:

result = self.db.jobs.insert_one(job_dict)

它通过单元测试工作,该测试执行与mongodb相同的代码路径.但是当我使用HTTP POST通过CherryPy和uWSGI执行时,我得到了这个:

pymongo.errors.ServerSelectionTimeoutError: No servers found yet

为什么我在通过CherryPy和uWSGI运行时会看到这种行为？这可能是PyMongo 3中的新线程模型吗？

更新:

如果我通过使用CherryPy内置服务器运行没有uWSGI和nginx,那么就insert_one()可以了.

更新1/25美国东部时间下午4:53:

在PyMongo中添加一些调试后,似乎topology._update_servers()知道服务器'myserver-a.mongolab.com'的server_type = 2.但是server_description.known_servers()服务器'myserver.mongolab.com'的server_type = 0

这导致以下堆栈跟踪:

result = self.db.jobs.insert_one(job_dict)
File "/usr/local/lib/python3.4/site-packages/pymongo/collection.py", line 466, in insert_one
with self._socket_for_writes() as sock_info:
File "/usr/local/lib/python3.4/contextlib.py", line 59, in __enter__
return next(self.gen)
File …

我正在使用AWS Javascript API并尝试获取指定的cognito id:

AWS.config.credentials.get(function(err) {
    if (!err) {
        console.log("Cognito Identity Id: " + AWS.config.credentials.identityId);
    }
});

为什么这会导致下面的消息出现400错误？

{"__type":"InvalidIdentityPoolConfigurationException","message":"Invalid identity pool configuration. Check assigned IAM roles for this pool."}

我为经过身份验证和未经身份验证的用户配置了IAM角色.

{
"Version": "2012-10-17",
"Statement": [{
    "Action": [
        "mobileanalytics:PutEvents",
        "cognito-sync:*"
    ],
    "Effect": "Allow",
    "Resource": [
        "*"
    ]
}]
}

成功获取cognito身份后，我们再尝试获取openIdToken()

AWS.config.credentials.get(function(err) {
    if (!err) {
      var cognitoIdentity = new AWS.CognitoIdentity();
      cognitoIdentity.getOpenIdToken({IdentityId: AWS.config.credentials.identityId}, function(err, data) {
        if (err) console.log(err, err.stack); // an error occurred
        else     console.log(data);           // successful response
      });

    } else {
      console.log('cognito error: ' + err);
    }
  });

但是，这失败了：

"NotAuthorizedException: Access to Identity 'us-east-1:xxxxx' is forbidden.

完整的错误跟踪：

    POST https://cognito-identity.us-east-1.amazonaws.com/ 400 (Bad Request)
    aws-sdk.min.js:5 [AWS cognitoidentity 400 0.192s 0 retries] getOpenIdToken({IdentityId: 'us-east-1:xxxxx' })
routing.html:64 Error: Access to Identity 'us-east-1:xxxxx' is forbidden.
    at a (https://www.example.com/bower_components/aws-sdk-js/dist/aws-sdk.min.js:6:3548)
    at r.SequentialExecutor.r.util.inherit.callListeners (https://www.example.com/bower_components/aws-sdk-js/dist/aws-sdk.min.js:6:28594)
    at r.SequentialExecutor.r.util.inherit.emit …